Large DB Performance problems when updating schemas

Question

Hi,
I'm facing performance problems updating the schema of large databases in SQLServer 2008 R2 and I can't find a proper solution. I would have thought that this is a fairly common problem so here it goes.
I have a database which is about 700Gb in size. I am going to detail 2 different issues:
EXAMPLE 1: CHANGING A FIELD TYPE
In that Database I have a table with the schema detailed below as Table_TB. This table contains several million records. As you can see there is a column of type TEXT (Comment_FD). What I am trying to do is changing  the column type to NVARCHAR(MAX) to
remove the deprecated TEXT type and support UNICODE characters in that field.
The command I am running is the following one:
ALTER TABLE DBA.Table_TB ALTER COLUMN Comment_FD NVARCHAR(MAX)
This operation takes several hours to complete.
I tried the following:
-Adding the new column to the same table and copying the data over
-Creating a new entire table with the new field type modified and copy the data over
-Exporting to disk the contents of the table, truncate the table and reimporting the data both with Management Studio and the bcp tool. 
-When copying to a new table I made also tried removing the PK of the table to skip the overhead of creating an index. 
-I also tried using a simple spd to copy the data over (to the column in the same table and the other table) in batches. 
In ALL my tests I set the SQLServer Recovery model to Simple to skip as much as I can the overhead of generating logs.
No matter what I do, the times to complete this operation seem to be unusable. 
Please note that I am reducing this problem to its minimum expression. Can't say precisely how long the operation takes, but a script that contain 5 field type changes identical to that one in that and other two tables takes 7 days to complete!!! The REAL problem
is that I have several other fields to which I need to change the type, and they currently amount to a total running time of 14 days!. And this is just changing a handful of fields in a handful of tables. At some point every string in the system will need
to be migrated to get unicode support, making this completely impracticable.
**Based on smaller DBs in the same system I guesstimate this table will contain about 14M records and will be about 44Gb in size. 
EXAMPLE 2: ADDING COLUMNS
I have another table int the same DB, with a schema detailed below as Table_2_TB, and again several million records in it. I am trying to add a colum using the following SQL:
ALTER TABLE DBA.Table2_TB ADD strFiDatasourceName_FD VARCHAR(64) NOT NULL DEFAULT ''
This operation takes a bit more than 7 hours to complete.
**Based on smaller DBs in the same system I guesstimate this table will contain about 54M records, and a size of 98Gb.
QUESTIONS:
---->Am I doing something wrong, or is there any way to optimize either the SQL or the SQLServer configuration to speed this up?
---->Are these performance levels normal at all when dealing with databases of this size? 
---->Anyone out there with experience on DBs of this size?
---->Does Microsoft offer some kind of service (cloud?) to make structural changes in large Dbs?
Thanks a lot for your help in advance!
This is the schema for the first table:
CREATE TABLE [DBA].[Table_TB](
[BranchCode_FD] [char](2) NOT NULL,
[FolderNo_FD] [int] NOT NULL,
[DateTime_FD] [datetime] NULL,
[Staff_FD] [char](3) NULL,
[Action_FD] [varchar](25) NULL,
[Comment_FD] [text] NULL,
[Team_FD] [varchar](8) NULL,
[Group_FD] [varchar](8) NULL,
[PopUpDate_FD] [smalldatetime] NULL,
[nRecordID_FD] [smallint] NOT NULL,
[nFiFoldItemID_FD] [smallint] NOT NULL,
PRIMARY KEY CLUSTERED
[BranchCode_FD] ASC,
[FolderNo_FD] ASC,
[nRecordID_FD] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON, FILLFACTOR = 100) ON [PRIMARY]
) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY]
GO
SET ANSI_PADDING OFF
GO
ALTER TABLE [DBA].[Table_TB] ADD CONSTRAINT [DF__Table_TB__DateTime] DEFAULT ('1980-01-01') FOR [DateTime_FD]
GO
ALTER TABLE [DBA].[Table_TB] ADD CONSTRAINT [DF__Table_TB__PopUp__096A45D7] DEFAULT ('1980-01-01') FOR [PopUpDate_FD]
GO
ALTER TABLE [DBA].[Table_TB] ADD DEFAULT ((-1)) FOR [nFiFoldItemID_FD]
GO
This is the schema for the second table:
CREATE TABLE [DBA].[Table2_TB](
[strBBranchCode_FD] [char](2) NOT NULL,
[lFFoldNo_FD] [int] NOT NULL,
[nFiFoldItemID_FD] [smallint] NOT NULL,
[strFiType_FD] [char](3) NOT NULL,
[dtFiCreateDate_FD] [smalldatetime] NOT NULL,
[strFiBookingRef_FD] [varchar](32) NOT NULL,
[strFiBookingRefDayMonth_FD] [varchar](5) NOT NULL,
[strFiBookedVia_FD] [varchar](50) NOT NULL,
[bFiInterfaced_FD] [smallint] NOT NULL,
[nFiSortOrder_FD] [smallint] NOT NULL,
[strFiCreateStaffCode_FD] [char](3) NOT NULL,
[strPcProductCode_FD] [varchar](5) NOT NULL,
[dtFiStartDateTime_FD] [smalldatetime] NOT NULL,
[lFiFinanVendID_FD] [int] NOT NULL,
[lFiItinVendID_FD] [int] NOT NULL,
[dtFiVendBalDueDate_FD] [smalldatetime] NOT NULL,
[dtFiVendDepositDueDate_FD] [smalldatetime] NOT NULL,
[strFiStatus_FD] [varchar](2) NOT NULL,
[bFiTransFeeHasBeenApplied_FD] [smallint] NOT NULL,
[bFiATOLTypeMan_FD] [smallint] NOT NULL,
[nFiATOLType_FD] [smallint] NOT NULL,
[strCcClassCode_FD] [varchar](10) NOT NULL,
[strFiStartPointCode_FD] [varchar](5) NOT NULL,
[strFiEndPointCode_FD] [varchar](5) NOT NULL,
[strFiAirlineCode_FD] [varchar](3) NOT NULL,
[strFiVendDocNo_FD] [varchar](16) NOT NULL,
[dtFiIssueDate_FD] [smalldatetime] NOT NULL,
[strFiDiscReasonCode_FD] [varchar](3) NOT NULL,
[nFiLastFoldPricingID_FD] [smallint] NOT NULL,
[strFiPrintingNote_FD] [text] NOT NULL,
[strFiNonPrintingNote_FD] [text] NOT NULL,
[dtFiStatusExpiryDate_FD] [smalldatetime] NOT NULL,
[strFiClientFreqTravellerNo_FD] [varchar](20) NOT NULL,
[strFiRouteNo_FD] [varchar](5) NOT NULL,
[nFiNumBum_FD] [smallint] NOT NULL,
[dtFiEndDateTime_FD] [smalldatetime] NOT NULL,
[strFiFareBase_FD] [varchar](15) NOT NULL,
[strFiInterfaceItemID_FD] [varchar](15) NOT NULL,
[strFiEndPointLoc_FD] [varchar](255) NULL,
[strFiStartPointLoc_FD] [varchar](255) NULL,
[strMcMealCode_FD] [varchar](5) NOT NULL,
[strFiSeatNote_FD] [text] NOT NULL,
[strFiMealNote_FD] [text] NOT NULL,
[strFiAirCraftType_FD] [varchar](5) NOT NULL,
[strFiJourneyTime_FD] [varchar](8) NOT NULL,
[strFiCheckInMins_FD] [varchar](10) NOT NULL,
[lFiJourneyDist_FD] [int] NOT NULL,
[nFiNumStop_FD] [smallint] NOT NULL,
[strFiBaggageAllow_FD] [varchar](15) NOT NULL,
[strFiIssueStaffCode_FD] [varchar](20) NOT NULL,
[dtFiDispatchDate_FD] [smalldatetime] NOT NULL,
[strFiDispatchStaffCode_FD] [varchar](3) NOT NULL,
[strDmDispatchCode_FD] [varchar](2) NOT NULL,
[lfFiVendDepositDueAmt_FD] [decimal](17, 2) NOT NULL,
[strFiRateCode_FD] [varchar](50) NOT NULL,
[strFiRatePlan_FD] [varchar](2) NOT NULL,
[strFiCabinNo_FD] [varchar](8) NOT NULL,
[strFiMileage_FD] [varchar](10) NOT NULL,
[strFiStartPointLocTelNo_FD] [varchar](40) NULL,
[strFiBookingGuarantee_FD] [varchar](60) NOT NULL,
[strFiSpecialRemarks_FD] [varchar](250) NULL,
[strFiCxnCondition_FD] [varchar](100) NOT NULL,
[bFiFlyDrive_FD] [smallint] NOT NULL,
[strFiConfNo_FD] [varchar](32) NOT NULL,
[lFiLinkID_FD] [int] NOT NULL,
[strFiCategory_FD] [varchar](15) NOT NULL,
[nFiNumRoom_FD] [smallint] NOT NULL,
[nFiNumDay_FD] [smallint] NOT NULL,
[nFiSaleFoldItemID_FD] [smallint] NOT NULL,
[bFiRefundItem_FD] [smallint] NOT NULL,
[strFiFareSavingCode_FD] [varchar](2) NOT NULL,
[lfFiFareSavingAmt_FD] [decimal](17, 2) NOT NULL,
[strFiRateNote_FD] [text] NOT NULL,
[strFiDiscCode_FD] [varchar](20) NOT NULL,
[strFiReqDispatchMethodCode_FD] [varchar](2) NOT NULL,
[dtFiReqDispatchDateTime_FD] [smalldatetime] NOT NULL,
[nFiReqDispatchVoucherType_FD] [smallint] NOT NULL,
[nFiLastFoldItemDetailID_FD] [smallint] NOT NULL,
[nFiNumConjunction_FD] [smallint] NOT NULL,
[lfFiBSPFrgnBaseFareAmt_FD] [decimal](17, 2) NOT NULL,
[lfFiBSPBaseFareAmt_FD] [decimal](17, 2) NOT NULL,
[lfFiBSPTaxDiscrepancy_FD] [decimal](17, 2) NOT NULL,
[lfFiBSPPenaltyFeeAmt_FD] [decimal](17, 2) NOT NULL,
[nFiRegion_FD] [smallint] NOT NULL,
[strFiOpenTktNo_FD] [varchar](16) NOT NULL,
[strFiTktSource_FD] [varchar](3) NOT NULL,
[strFiJourneyType_FD] [varchar](3) NOT NULL,
[strFiTktType_FD] [varchar](3) NOT NULL,
[strFiInterfaceNameRemark_FD] [varchar](50) NULL,
[nFiATOLIssuedStatus_FD] [smallint] NOT NULL,
[strFiFareSavingFareBase_FD] [varchar](13) NOT NULL,
[strFiPaxType_FD] [varchar](3) NOT NULL,
[strFiActualCarrier_FD] [varchar](2) NOT NULL,
[strFiNetRemitType_FD] [varchar](1) NOT NULL,
[strFiFareConstruction_FD] [text] NOT NULL,
[lfFiBSPTotVATAmt_FD] [decimal](17, 2) NOT NULL,
[bFiNetFare_FD] [smallint] NOT NULL,
[strFiTourCode_FD] [varchar](50) NOT NULL,
[strFiSuppFOPInfo_FD] [varchar](255) NOT NULL,
[lfFitBSPPublishedCommPerc_FD] [decimal](12, 6) NOT NULL,
[strFiBSPFareCurrCode_FD] [varchar](3) NOT NULL,
[strFiTktIssueIataNo_FD] [varchar](8) NOT NULL,
[lfFiFareOfferedSavingAmt_FD] [decimal](17, 2) NOT NULL,
[strFiFareOfferedSavingCode_FD] [varchar](2) NOT NULL,
[strFiDesc_FD] [varchar](8000) NOT NULL,
[lfFiBSPFareBuyDiscrepancyAmt_FD] [decimal](17, 2) NOT NULL,
[bFiNoPrintOnItin_FD] [smallint] NOT NULL,
[dtFiStatusCodeChangeDateTime_FD] [smalldatetime] NOT NULL,
[bFiNoPrintIfAllPricingsZeroCustAmt_FD] [smallint] NOT NULL,
[strFiFareSavingFareBaseLow_FD] [varchar](13) NOT NULL,
[lfFiFareSavingLowAmt_FD] [decimal](17, 2) NOT NULL,
[strFiBrochureCode_FD] [varchar](8) NOT NULL,
[bFiVendPayDepositNow_FD] [smallint] NOT NULL,
[bFiVendPayBalanceNow_FD] [smallint] NOT NULL,
[strFiBankBranchCode_FD] [varchar](2) NOT NULL,
[strFiOperatingAirlineCode_FD] [varchar](2) NOT NULL,
[strFiFarePassengerTypeCode_FD] [varchar](3) NOT NULL,
[strFiAssociatedFarePricingInfoID_FD] [varchar](15) NOT NULL,
[bFiVerificationReq_FD] [smallint] NOT NULL,
[dtFiLastVerifiedDateTime_FD] [datetime] NOT NULL,
[lFiLastVerifiedLevel_FD] [int] NOT NULL,
[lFiLastVerifiedWithCount_FD] [int] NOT NULL,
[dtFiTktingStatusChangeDateTime_FD] [smalldatetime] NOT NULL,
[strFiTktingInformation_FD] [text] NOT NULL,
[strFiTktingStatus_FD] [varchar](2) NOT NULL,
[lfFiBSPFareSellDiscrepancyAmt_FD] [decimal](17, 2) NOT NULL,
[lfFiBSPTaxBuyDiscrepancyAmt_FD] [decimal](17, 2) NOT NULL,
[strFiTktingBatchID_FD] [varchar](15) NOT NULL,
[dtFiTktingBatchDateTime_FD] [smalldatetime] NOT NULL,
[lIplPolicyLevelID_FD] [int] NOT NULL,
[strFiTktingDescription_FD] [varchar](1000) NOT NULL,
[strFiTktingDataVersion_FD] [varchar](10) NOT NULL,
[strFiSourceTktingSystem_FD] [varchar](20) NOT NULL,
[strFiOthPtsPmtCode_FD] [varchar](3) NOT NULL,
[bFiManualPtsEntry_FD] [smallint] NOT NULL,
[strFiEndorsement_FD] [varchar](500) NOT NULL,
[strFiOwnedByStaffCode_FD] [char](3) NOT NULL,
[strFiThirdPartyTrackingID_FD] [varchar](25) NOT NULL,
[strFiAdditionalPrintingNote_FD] [text] NULL,
[bFiOverridePrintingNote_FD] [smallint] NOT NULL,
[lfFiCarbonOffsetWeightAmt_FD] [decimal](17, 2) NOT NULL,
[strFiCancellationPolicyNote_FD] [text] NULL,
[bFiPEProcessed_FD] [smallint] NOT NULL,
[bFiActingAsAgentFor_FD] [smallint] NOT NULL,
[nFiOriginalBuyingBasis_FD] [smallint] NOT NULL,
[bFiIsOpenSegment_FD] [smallint] NOT NULL,
[nFiCreateSource_FD] [smallint] NOT NULL,
[strFiBookingSourceInvoiceNo_FD] [varchar](7) NOT NULL,
[strFiGDSPaxTypeCode_FD] [varchar](8) NOT NULL,
[strFiNetFareGDSAccountCode_FD] [varchar](8) NOT NULL,
[strFiPOSID_FD] [varchar](50) NOT NULL,
[bFiIsPOSEditable_FD] [smallint] NOT NULL,
[lfFiCustExchRate_FD] [decimal](16, 8) NOT NULL,
[lfFiCustFareSavingLowAmt_FD] [decimal](17, 2) NOT NULL,
[lfFiCustFareSavingAmt_FD] [decimal](17, 2) NOT NULL,
[lfFiCustFareOfferedSavingAmt_FD] [decimal](17, 2) NOT NULL,
[bFiCCItemPayableToBranch_FD] [smallint] NOT NULL,
[dtFiExternalAccountingDate_FD] [smalldatetime] NOT NULL,
[strFiSourceSystemBookResponseText_FD] [text] NOT NULL,
[bFiIsConnection_FD] [smallint] NOT NULL,
[bFiIsPEFoldLevelItem_FD] [smallint] NOT NULL,
[nFiReqdEndorsedConjTktType_FD] [smallint] NOT NULL,
[bFiEndorsedConjTktDetailIsManual_FD] [smallint] NOT NULL,
[strFiReqdEndorsedConjTktDetailText_FD] [varchar](30) NOT NULL,
[lFiLastTktingTemplateID_FD] [int] NOT NULL,
[dtFiBookedDate_FD] [smalldatetime] NOT NULL,
[strFiTktingVerificationWarning_FD] [varchar](1000) NOT NULL,
[strFiTktingVerificationError_FD] [varchar](1000) NOT NULL,
[strFiTktingError_FD] [varchar](1000) NOT NULL,
[strFiCustomerAccountingData00_FD] [varchar](50) NOT NULL,
[strFiCustomerAccountingData01_FD] [varchar](50) NOT NULL,
[strFiCustomerAccountingData02_FD] [varchar](50) NOT NULL,
[strFiCustomerAccountingData03_FD] [varchar](50) NOT NULL,
[strFiCustomerAccountingData04_FD] [varchar](50) NOT NULL,
[strFiCustomerAccountingData05_FD] [varchar](50) NOT NULL,
[strFiCustomerAccountingData06_FD] [varchar](50) NOT NULL,
[strFiCustomerAccountingData07_FD] [varchar](50) NOT NULL,
[strFiCustomerAccountingData08_FD] [varchar](50) NOT NULL,
[strFiCustomerAccountingData09_FD] [varchar](50) NOT NULL,
[strFiCustomerAccountingDataNote_FD] [varchar](100) NOT NULL,
[strFiCustomerAccountingData10_FD] [varchar](50) NOT NULL,
[strFiCustomerAccountingData11_FD] [varchar](50) NOT NULL,
[strFiCustomerAccountingData12_FD] [varchar](50) NOT NULL,
[strFiCustomerAccountingData13_FD] [varchar](50) NOT NULL,
[strFiCustomerAccountingData14_FD] [varchar](50) NOT NULL,
[strFiCustomerAccountingData15_FD] [varchar](50) NOT NULL,
[strFiCustomerAccountingData16_FD] [varchar](50) NOT NULL,
[strFiCustomerAccountingData17_FD] [varchar](50) NOT NULL,
[strFiCustomerAccountingData18_FD] [varchar](50) NOT NULL,
[strFiCustomerAccountingData19_FD] [varchar](50) NOT NULL,
[nFiFlightBasis_FD] [smallint] NOT NULL,
[lFiStartPointVendID_FD] [int] NOT NULL,
[lFiEndPointVendID_FD] [int] NOT NULL,
[lCtID_FD] [int] NOT NULL,
[strFiContractCode_FD] [varchar](25) NOT NULL,
[strFiContractPeriodCode_FD] [varchar](50) NOT NULL,
PRIMARY KEY CLUSTERED
[strBBranchCode_FD] ASC,
[lFFoldNo_FD] ASC,
[nFiFoldItemID_FD] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON, FILLFACTOR = 100) ON [PRIMARY]
) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY]
GO
ALTER TABLE [DBA].[Table2_TB] WITH NOCHECK ADD FOREIGN KEY([nFiReqDispatchVoucherType_FD])
REFERENCES [DBA].[VoucherTypes_TB] ([nVtCode_FD])
GO
ALTER TABLE [DBA].[Table2_TB] WITH NOCHECK ADD FOREIGN KEY([strPcProductCode_FD], [strFiType_FD])
REFERENCES [DBA].[ProductCodes_TB] ([ProductCode_FD], [Type_FD])
GO
ALTER TABLE [DBA].[Table2_TB] WITH NOCHECK ADD FOREIGN KEY([strBBranchCode_FD], [lFFoldNo_FD])
REFERENCES [DBA].[Folder_TB] ([BranchCode_FD], [FolderNo_FD])
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__strBB__44AB0736] DEFAULT ('') FOR [strBBranchCode_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__lFFol__459F2B6F] DEFAULT (0) FOR [lFFoldNo_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__nFiFo__46934FA8] DEFAULT ((-1)) FOR [nFiFoldItemID_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__strFi__478773E1] DEFAULT ('') FOR [strFiType_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__dtFiC__487B981A] DEFAULT ('1980-01-01') FOR [dtFiCreateDate_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_TB__strFiBookingRef] DEFAULT ('') FOR [strFiBookingRef_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__strFi__4A63E08C] DEFAULT ('') FOR [strFiBookingRefDayMonth_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_TB__strFiBookedVia_FD] DEFAULT ('') FOR [strFiBookedVia_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__bFiIn__4C4C28FE] DEFAULT (0) FOR [bFiInterfaced_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__nFiSo__4D404D37] DEFAULT ((-1)) FOR [nFiSortOrder_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__strFi__4E347170] DEFAULT ('') FOR [strFiCreateStaffCode_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_TB__strPcProductCode] DEFAULT ('') FOR [strPcProductCode_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__dtFiS__501CB9E2] DEFAULT ('1980-01-01') FOR [dtFiStartDateTime_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__lFiFi__5110DE1B] DEFAULT ((-1)) FOR [lFiFinanVendID_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__lFiIt__52050254] DEFAULT ((-1)) FOR [lFiItinVendID_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__dtFiV__52F9268D] DEFAULT ('1980-01-01') FOR [dtFiVendBalDueDate_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__dtFiV__53ED4AC6] DEFAULT ('1980-01-01') FOR [dtFiVendDepositDueDate_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__strFi__54E16EFF] DEFAULT ('') FOR [strFiStatus_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__bFiTr__55D59338] DEFAULT (0) FOR [bFiTransFeeHasBeenApplied_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__bFiAT__56C9B771] DEFAULT (0) FOR [bFiATOLTypeMan_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__nFiAT__57BDDBAA] DEFAULT (0) FOR [nFiATOLType_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__strCc__58B1FFE3] DEFAULT ('') FOR [strCcClassCode_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_TB__strFiStartPointCode] DEFAULT ('') FOR [strFiStartPointCode_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_TB__strFiEndPointCode] DEFAULT ('') FOR [strFiEndPointCode_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__strFi__5B8E6C8E] DEFAULT ('') FOR [strFiAirlineCode_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__strFi__5C8290C7] DEFAULT ('') FOR [strFiVendDocNo_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__dtFiI__5D76B500] DEFAULT ('1980-01-01') FOR [dtFiIssueDate_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__strFi__5E6AD939] DEFAULT ('') FOR [strFiDiscReasonCode_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__nFiLa__5F5EFD72] DEFAULT ((-1)) FOR [nFiLastFoldPricingID_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__strFi__605321AB] DEFAULT ('') FOR [strFiPrintingNote_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__strFi__614745E4] DEFAULT ('') FOR [strFiNonPrintingNote_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__dtFiS__623B6A1D] DEFAULT ('1980-01-01') FOR [dtFiStatusExpiryDate_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__strFi__632F8E56] DEFAULT ('') FOR [strFiClientFreqTravellerNo_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__strFi__6423B28F] DEFAULT ('') FOR [strFiRouteNo_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_TB__nFiNumBum] DEFAULT ((-1)) FOR [nFiNumBum_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__dtFiE__660BFB01] DEFAULT ('1980-01-01') FOR [dtFiEndDateTime_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__strFi__67001F3A] DEFAULT ('') FOR [strFiFareBase_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__strFi__67F44373] DEFAULT ('') FOR [strFiInterfaceItemID_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__strFi__68E867AC] DEFAULT ('') FOR [strFiEndPointLoc_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__strFi__69DC8BE5] DEFAULT ('') FOR [strFiStartPointLoc_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__strMc__6AD0B01E] DEFAULT ('') FOR [strMcMealCode_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__strFi__6BC4D457] DEFAULT ('') FOR [strFiSeatNote_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__strFi__6CB8F890] DEFAULT ('') FOR [strFiMealNote_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__strFi__6DAD1CC9] DEFAULT ('') FOR [strFiAirCraftType_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__strFi__6EA14102] DEFAULT ('') FOR [strFiJourneyTime_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__strFi__6F95653B] DEFAULT ('') FOR [strFiCheckInMins_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__lFiJo__70898974] DEFAULT (0) FOR [lFiJourneyDist_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__nFiNu__717DADAD] DEFAULT (0) FOR [nFiNumStop_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__strFi__7271D1E6] DEFAULT ('') FOR [strFiBaggageAllow_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__strFi__7365F61F] DEFAULT ('') FOR [strFiIssueStaffCode_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__dtFiD__745A1A58] DEFAULT ('1980-01-01') FOR [dtFiDispatchDate_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__strFi__754E3E91] DEFAULT ('') FOR [strFiDispatchStaffCode_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__strDm__764262CA] DEFAULT ('') FOR [strDmDispatchCode_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__lfFiV__77368703] DEFAULT (0) FOR [lfFiVendDepositDueAmt_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__strFi__782AAB3C] DEFAULT ('') FOR [strFiRateCode_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__strFi__791ECF75] DEFAULT ('') FOR [strFiRatePlan_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__strFi__7A12F3AE] DEFAULT ('') FOR [strFiCabinNo_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__strFi__7B0717E7] DEFAULT ('') FOR [strFiMileage_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__strFi__7BFB3C20] DEFAULT ('') FOR [strFiStartPointLocTelNo_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__strFi__7CEF6059] DEFAULT ('') FOR [strFiBookingGuarantee_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__strFi__7DE38492] DEFAULT ('') FOR [strFiSpecialRemarks_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__strFi__7ED7A8CB] DEFAULT ('') FOR [strFiCxnCondition_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__bFiFl__7FCBCD04] DEFAULT (0) FOR [bFiFlyDrive_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__strFi__00BFF13D] DEFAULT ('') FOR [strFiConfNo_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__lFiLi__01B41576] DEFAULT ((-1)) FOR [lFiLinkID_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__strFi__02A839AF] DEFAULT ('') FOR [strFiCategory_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__nFiNu__039C5DE8] DEFAULT (0) FOR [nFiNumRoom_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__nFiNu__04908221] DEFAULT (0) FOR [nFiNumDay_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__nFiSa__0584A65A] DEFAULT ((-1)) FOR [nFiSaleFoldItemID_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__bFiRe__0678CA93] DEFAULT (0) FOR [bFiRefundItem_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__strFi__076CEECC] DEFAULT ('') FOR [strFiFareSavingCode_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__lfFiF__08611305] DEFAULT (0) FOR [lfFiFareSavingAmt_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__strFi__0955373E] DEFAULT ('') FOR [strFiRateNote_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__strFi__0A495B77] DEFAULT ('') FOR [strFiDiscCode_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__strFi__0B3D7FB0] DEFAULT ('') FOR [strFiReqDispatchMethodCode_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__dtFiR__0C31A3E9] DEFAULT ('1980-01-01') FOR [dtFiReqDispatchDateTime_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__nFiRe__0D25C822] DEFAULT (0) FOR [nFiReqDispatchVoucherType_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__nFiLa__0F0E1094] DEFAULT ((-1)) FOR [nFiLastFoldItemDetailID_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__nFiNu__100234CD] DEFAULT (0) FOR [nFiNumConjunction_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__lfFiB__10F65906] DEFAULT (0) FOR [lfFiBSPFrgnBaseFareAmt_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__lfFiB__11EA7D3F] DEFAULT (0) FOR [lfFiBSPBaseFareAmt_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__lfFiB__12DEA178] DEFAULT (0) FOR [lfFiBSPTaxDiscrepancy_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__lfFiB__13D2C5B1] DEFAULT (0) FOR [lfFiBSPPenaltyFeeAmt_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__bFiDo__14C6E9EA] DEFAULT (0) FOR [nFiRegion_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__strFi__15BB0E23] DEFAULT ('') FOR [strFiOpenTktNo_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__strFi__16AF325C] DEFAULT ('') FOR [strFiTktSource_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__strFi__17A35695] DEFAULT ('') FOR [strFiJourneyType_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__strFi__18977ACE] DEFAULT ('') FOR [strFiTktType_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__strFi__198B9F07] DEFAULT ('') FOR [strFiInterfaceNameRemark_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__nFiAT__1A7FC340] DEFAULT ((-1)) FOR [nFiATOLIssuedStatus_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__strFi__1B73E779] DEFAULT ('') FOR [strFiFareSavingFareBase_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__strFi__1C680BB2] DEFAULT ('') FOR [strFiPaxType_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__strFi__1D5C2FEB] DEFAULT ('') FOR [strFiActualCarrier_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__strFi__1E505424] DEFAULT ('') FOR [strFiNetRemitType_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__strFi__1F44785D] DEFAULT ('') FOR [strFiFareConstruction_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__lfFiB__20389C96] DEFAULT (0) FOR [lfFiBSPTotVATAmt_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__bFiNe__212CC0CF] DEFAULT (0) FOR [bFiNetFare_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__strFi__2220E508] DEFAULT ('') FOR [strFiTourCode_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__strFi__23150941] DEFAULT ('') FOR [strFiSuppFOPInfo_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__lfFit__24092D7A] DEFAULT (0) FOR [lfFitBSPPublishedCommPerc_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__strFi__24FD51B3] DEFAULT ('') FOR [strFiBSPFareCurrCode_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__strFi__25F175EC] DEFAULT ('') FOR [strFiTktIssueIataNo_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__lfFiF__27D9BE5E] DEFAULT (0) FOR [lfFiFareOfferedSavingAmt_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD CONSTRAINT [DF__Table2_T__strFi__251D4D44] DEFAULT ('') FOR [strFiFareOfferedSavingCode_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ('') FOR [strFiDesc_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT (0) FOR [lfFiBSPFareBuyDiscrepancyAmt_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT (0) FOR [bFiNoPrintOnItin_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ('1980-1-1') FOR [dtFiStatusCodeChangeDateTime_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT (0) FOR [bFiNoPrintIfAllPricingsZeroCustAmt_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ('') FOR [strFiFareSavingFareBaseLow_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT (0) FOR [lfFiFareSavingLowAmt_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ('') FOR [strFiBrochureCode_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT (0) FOR [bFiVendPayDepositNow_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT (0) FOR [bFiVendPayBalanceNow_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ('') FOR [strFiBankBranchCode_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ('') FOR [strFiOperatingAirlineCode_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ('') FOR [strFiFarePassengerTypeCode_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ('') FOR [strFiAssociatedFarePricingInfoID_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT (0) FOR [bFiVerificationReq_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ('1980-01-01') FOR [dtFiLastVerifiedDateTime_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT (0) FOR [lFiLastVerifiedLevel_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT (0) FOR [lFiLastVerifiedWithCount_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ('1980-01-01') FOR [dtFiTktingStatusChangeDateTime_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ('') FOR [strFiTktingInformation_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ('') FOR [strFiTktingStatus_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT (0) FOR [lfFiBSPFareSellDiscrepancyAmt_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT (0) FOR [lfFiBSPTaxBuyDiscrepancyAmt_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ('') FOR [strFiTktingBatchID_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ('1980-01-01') FOR [dtFiTktingBatchDateTime_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ((-1)) FOR [lIplPolicyLevelID_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ('') FOR [strFiTktingDescription_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ('') FOR [strFiTktingDataVersion_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ('') FOR [strFiSourceTktingSystem_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ('') FOR [strFiOthPtsPmtCode_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT (0) FOR [bFiManualPtsEntry_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ('') FOR [strFiEndorsement_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ('') FOR [strFiOwnedByStaffCode_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ('') FOR [strFiThirdPartyTrackingID_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ('') FOR [strFiAdditionalPrintingNote_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT (0) FOR [bFiOverridePrintingNote_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT (0) FOR [lfFiCarbonOffsetWeightAmt_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ('') FOR [strFiCancellationPolicyNote_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT (0) FOR [bFiPEProcessed_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT (0) FOR [bFiActingAsAgentFor_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT (0) FOR [nFiOriginalBuyingBasis_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT (0) FOR [bFiIsOpenSegment_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT (0) FOR [nFiCreateSource_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT (' ') FOR [strFiBookingSourceInvoiceNo_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ('') FOR [strFiGDSPaxTypeCode_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ('') FOR [strFiNetFareGDSAccountCode_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ('') FOR [strFiPOSID_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT (0) FOR [bFiIsPOSEditable_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ((0)) FOR [lfFiCustExchRate_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ((0)) FOR [lfFiCustFareSavingLowAmt_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ((0)) FOR [lfFiCustFareSavingAmt_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ((0)) FOR [lfFiCustFareOfferedSavingAmt_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ((0)) FOR [bFiCCItemPayableToBranch_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ('1980-01-01') FOR [dtFiExternalAccountingDate_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ('') FOR [strFiSourceSystemBookResponseText_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ((0)) FOR [bFiIsConnection_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ((0)) FOR [bFiIsPEFoldLevelItem_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ((0)) FOR [nFiReqdEndorsedConjTktType_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ((0)) FOR [bFiEndorsedConjTktDetailIsManual_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ('') FOR [strFiReqdEndorsedConjTktDetailText_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ((-1)) FOR [lFiLastTktingTemplateID_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ('1980-01-01') FOR [dtFiBookedDate_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ('') FOR [strFiTktingVerificationWarning_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ('') FOR [strFiTktingVerificationError_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ('') FOR [strFiTktingError_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ('') FOR [strFiCustomerAccountingData00_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ('') FOR [strFiCustomerAccountingData01_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ('') FOR [strFiCustomerAccountingData02_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ('') FOR [strFiCustomerAccountingData03_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ('') FOR [strFiCustomerAccountingData04_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ('') FOR [strFiCustomerAccountingData05_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ('') FOR [strFiCustomerAccountingData06_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ('') FOR [strFiCustomerAccountingData07_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ('') FOR [strFiCustomerAccountingData08_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ('') FOR [strFiCustomerAccountingData09_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ('') FOR [strFiCustomerAccountingDataNote_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ('') FOR [strFiCustomerAccountingData10_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ('') FOR [strFiCustomerAccountingData11_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ('') FOR [strFiCustomerAccountingData12_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ('') FOR [strFiCustomerAccountingData13_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ('') FOR [strFiCustomerAccountingData14_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ('') FOR [strFiCustomerAccountingData15_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ('') FOR [strFiCustomerAccountingData16_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ('') FOR [strFiCustomerAccountingData17_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ('') FOR [strFiCustomerAccountingData18_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ('') FOR [strFiCustomerAccountingData19_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ((0)) FOR [nFiFlightBasis_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ((-1)) FOR [lFiStartPointVendID_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ((-1)) FOR [lFiEndPointVendID_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ((-1)) FOR [lCtID_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ('') FOR [strFiContractCode_FD]
GO
ALTER TABLE [DBA].[Table2_TB] ADD DEFAULT ('') FOR [strFiContractPeriodCode_FD]
GO

Answer 1

Hi,
I just wanted to summarize the conclusions we got here, in case it helps someone else.
For the case of the ALTER statement:
First we analyzed the query performance and found out that the query was I/O bound. A handful of useful scripts can be found on the links below. Some high values on PAGEIOLATCH wait times suggested some memory pressure, so we incremented the amount of memory
dedicated to the server up to 32GB. This single change was one of the most effective ones and reduced the query execution time by about 40%-50%. I guess SQLServer needs less paging to perform the operation when it can load more pages in memory at the same
time.
We run more tests tweaking some other mentioned variables like the server maxDOP, which made in fact the query slower the higher the value we set. The initial server config was set with auto CPU affinity, but I/O mask affinity set to the first 4 CPUs, and
we found out that setting it to ALL AUTO perform faster for some reason.
After some analysis made by Microsoft on the diagnostics/metrics data, the only interesting finding was that a couple of the storage volumes were performing slightly slower than the rest causing a bit of a bottleneck. We recommended the customer to look
into it with their storage team, but even with those fixed, we won't expect the query to run much faster.
No other tweaks have been found useful to speed up the ALTER statement. Basically it comes up to how fast you I/O subsystem is, and how much can SQLServer can cache in memory. No other suggestion has been made by Microsoft, and they've advised that any
other tweaked query (split the column addition and the constraints for example) is going to perform worse than the plain and simple alter statement.
On the NVARCHAR type problem:
As it was suggested by Erland Sommarskog, SQLServer 2014 Enterprise edition performed this operation about 40% faster than SQLServer 2008 R2 with the same hardware specs.
At the moment upgrading the customer infrastructure is not an option for us, so we don't have a proper solution to accomplish this in a workable time frame on SQLServer 2008. 
The strategy that we found might be the best option was the one suggessted by E. Sommarskog, bind our code for reading access to a COALESCED calculated column, and writing on the new converted NVARCHAR column. Schedule a batch job in the backgroud
to migrate all the data over time to the new column, and finally remove the old column.
Thanks a lot everyone for your help.
David.
Useful links:
http://www.sqlskills.com/blogs/paul/wait-statistics-or-please-tell-me-where-it-hurts/
http://msdn.microsoft.com/en-us/library/ms189768.aspx
http://rusanu.com/2014/02/24/how-to-analyse-sql-server-performance/