Count the No.of Columns in a Table

Hi,Is it possible to write a Select statement
that returns back the number of columns in a table?
Or is there any other way on knowing the number of
columns in a table?

Hi
Subtle point:
USER_TAB_COLUMNS returns information relating only to tables owned by the current user.
ALL_TAB_COLUMNS includes all the tables which the current user can select from, whether owned by the current user or not.
DBA_TAB_COLUMNS, if the user has access to it, gives information about all tables in all schemas, regardless of whether the current user can select from them or not.
...so USER_TAB_COLUMNS may or may not be the best view to use.
regards
Andrew
UK

Similar Messages

Query to find the no of columns in a table

Is there a query to find the total number of columns in a table?

Dou you know read?
-- the number of rows in a table named yourtable:
select count(1) from yourtable;
-- the number of columns in a table
-- If is a user's table:
select count(1)
from user_tab_columns
where table_name='YOURTABLE'
--If it is´t
select count(1)
from DBA_tab_columns
where owner = 'USEROWNER'
and table_name='YOURTABLE'

Can you programmatically change the width of columns in a table control\indicator

Is it possible to programmatically change the width of columns in a table control\indicator ie to fit to width of the data or in my case the header information.

Create a property node (or reference) and use the 'Active Cell' property to select which column you want to change and then use the 'Cell size'--> 'Width' property to change the size.
"There is a God shaped vacuum in the heart of every man which cannot be filled by any created thing, but only by God, the Creator, made known through Jesus." - Blaise Pascal
Attachments:
table.vi ‏33 KB

Changing the order of columns in a table

Can anyone tell me how to change the order of column in a table.
I want a new column to be added in a table in 2nd position.
Is there any way out for it?

1) Does this have something to do with security? If not, it really ought to be posted in a more appropriate forum (Database - General for example).
2) Why? If you care about the order of columns in a table, you're almost certainly doing something wrong. You can control the order of columns in a view, however, so you can put a view layer on top of the table to present the columns in a friendly fashion.
3) Not without recreating the table. You can use the DBMS_REDEFINITION package to recreate the table with zero or minimal downtime but behind the scenes, you're really just creating a new table, copying the data over, dropping the old table, and renaming the new table to use the old table's name. DBMS_REDEFINITION does some extra work to track changes so that the original table can be available until the last possible moment.
Justin

Counting the number of occurences in a table column

Hi All
I have a table with a column that contains approx. 5000 6-digit codes. A number of these codes are duplicted in the column, and I want to count the number of occurences of each code. The column looks a bit like -
WCID
940042
920012
940652
940199
188949
155146
155196
174196
152148
151281
196209
174015
182163
195465
195318
182008
189589
150675
There can be mulitple instances of each WCID and I need to count the number of instances of each. I also have access to another table that also has a column of each WCID, but only once - ie no multiple instances. The second table is identical except that there are only single instances of each WCID.
I thought I could either loop through on the table to be counted, from 100000 to 999999 and count each occurence that way, but it would be very inefficient. The other way I thought would be to perhaps select a WCID from the unique table, count the occurence of that, select the next WCID from the unique table, count that and so on, however I'm not sure how to do it in PL/SQL. Perhaps select the WCID from the unique table into a cursor, loop through that and compare it with the original table and count the instances?
I hope this makes some sense, any help would be really appreciated
Thanks
Bill

Hi, Bill,
That sounds like a job for GROUP BY:
SELECT    wcid
,         COUNT (*)       AS num_found
FROM      table_x
GROUP BY wcid
ORDER BY wcid
I hope that answers your question.
If not, post CREATE TABLE and INSERT statements for a little sample data, and the results you want from that data.

How do i know the number of columns in a table??

dont think the question is too odd for me to post here..
i am a new bee to oracle..
so i just to know is there some way by which i can know the the total number of columns in a table..
Thnks in advance for any solutions given

did you try it whaterver is suggested?
SQL> desc dept;
Name
DEPTNO
DNAME
LOC
SQL> SELECT c.TABLE_NAME,c.COLUMN_NAME,c.COLUMN_ID FROM user_tab_columns c
2 WHERE table_name='DEPT';
TABLE_NAME                     COLUMN_NAME                     COLUMN_ID
DEPT                           DEPTNO                                  1
DEPT                           DNAME                                   2
DEPT                           LOC                                     3
SQL> SELECT COUNT(c.COLUMN_NAME) FROM user_tab_columns c
2 WHERE table_name='DEPT';
COUNT(C.COLUMN_NAME)
                   3

How to find the frequently updated columns in a table

Hi ,
I need to find out all the columns of a tables which are frequently getting updated.
is there any way that I can achieve this ? I am not sure if any meta data information for DML operations exist in Oracle 9 i. Any input is welcome.
Thanks in Advance !!

Thank u , i am thinking the same, Thanks for the suggestion.
any other idea.... like is there any system table which we can query to get details about these dml operations on a table ?are there any kind of system audit tables in oracle where these get recorded ?

Count the number of columns return in an user-input sql query

I need to do something like this
I let an user input a sql query and then execute it
assuming the sql query is always correct, it will return a Resultset
then a table will pop up to accomodate the number of columns the resultset will produce
i'm stuck at the part on how to check how many columns of data will be return in the resultset

     ResultSet rs = stmt.executeQuery("SELECT a, b, c FROM TABLE2");
     ResultSetMetaData rsmd = rs.getMetaData();
     int numberOfColumns = rsmd.getColumnCount();

Count the number of rows in each table

I have a list of table names, how to I write a query to find out the row count of each table.
select table_name from all_tables a where owner='XXX' and num_row > 100
or
select table_name from all_tables a where owner='XXX' and sample_size > 100
doesn't quite work.
Why?
Thanks in advance,
Edited by: mpt_fz on Jan 12, 2010 12:06 PM

Well, then another method learned from Michael ;)
scott@ORCL>
scott@ORCL>select * from v$version;
BANNER
Oracle Database 11g Enterprise Edition Release 11.1.0.6.0 - Production
PL/SQL Release 11.1.0.6.0 - Production
CORE    11.1.0.6.0      Production
TNS for 32-bit Windows: Version 11.1.0.6.0 - Production
NLSRTL Version 11.1.0.6.0 - Production
Elapsed: 00:00:00.14
scott@ORCL>
scott@ORCL>
scott@ORCL>select table_name,
2         DBMS_XMLGEN.getxmltype(
3                                 'select count(*) c from '||table_name
4                               ).extract('//text()').getnumberval() tot_rows
5 from user_tables
6 where iot_type is null
7 or iot_type != 'IOT_OVERFLOW';
TABLE_NAME                       TOT_ROWS
A_TEST_TB_CASHFLOW                     14
TEST_DUMMY                              1
A_TEST_TB_CASHFLOW_N                    1
TEST_CAST                               1
DEPT                                    4
EMP                                    14
BONUS                                   0
SALGRADE                                5
EMP_DETAILS                             3
T_EMP                                   0
AUDIT_T                                 0
TABLE_NAME                       TOT_ROWS
C_C                                     4
TRAIN_DET                               2
TEST_COM_IMP                            2
TIME_P                                  1
PRI_UQ                                  4
TEST_CHK                                0
ANSHUMANSAHAISGENIOUS                   1
T                                       1
XEUROPE                                 2
D_D                                     8
PUBLICTRANSPORT                         4
TABLE_NAME                       TOT_ROWS
XASIA                                   2
TF1                                     0
TEST_HH                                14
TEST_SWAP                               4
REVIVE_XML                              3
XGMT                                    1
CUSTOMER_DET                            1
FOURWHEELER                             2
SPOOL_LOG                              13
CITYTRANSPORT                           8
T1                                      2
TABLE_NAME                       TOT_ROWS
T2                                      2
A_A                                     1
B_B                                     2
AUTOMOBILE                              1
XDUAL                                   1
S_TEMP                                  0
39 rows selected.
Elapsed: 00:00:08.78
scott@ORCL>Regards.
Satyaki De.

Populate dates within the date range columns in a table

Hi ,
I have a Students table with StudentID, StartDate and EndDate. For one of the requirements, I need to populate all the dates within and includeing the StartDate and EndDate for all the students. Please find the DDL for the source table samples and also below
samples of Source table columns and how the output should be.
create table #Students (ID int,startdate date,Enddate date)
insert into #Students values (1000, '2014-01-01',
'2014-01-10')
insert into #Students values (1000, '2014-02-22',
'2014-02-28')
insert into #Students values (1001, '2013-07-01',
'2013-07-12')
insert into #Students values (1001, '2013-08-01',
'2013-08-03')
insert into #Students values (1001, '2014-04-01',
'2014-04-05')
--select * from #Students order by id,startdate
--drop table #students
Thanks in advance for your help!

Hi vskindia,
A recursive way to achieve the expected output.
create table #Students (ID int,startdate date,Enddate date)
insert into #Students values (1000, '2014-01-01',
'2014-01-10')
insert into #Students values (1000, '2014-02-22',
'2014-02-28')
insert into #Students values (1001, '2013-07-01',
'2013-07-12')
insert into #Students values (1001, '2013-08-01',
'2013-08-03')
insert into #Students values (1001, '2014-04-01',
'2014-04-05')
;WITH cte AS
SELECT ID,startdate,Enddate FROM #Students
UNION ALL
SELECT ID,DATEADD(DAY,1,startdate) AS startdate,Enddate FROM cte
WHERE startdate<Enddate
SELECT id,startdate FROM CTE ORDER BY ID,startdate
If you have any question, feel free to let me know.
Eric Zhang
TechNet Community Support

How to Update the oracle toad column value in table by using SSRS 2008

Hi Team,
How to update the oracle DB table column value by using SSRS 2008.
Can any one help me on this.
Thanks,
Manasa.
Thank You, Manasa.V

Hi veerapaneni,
According to your description, you want to use SSRS to update data in database table. Right?
Though Reporting Services is mostly used for rendering data, your requirement is still can be achieved technically. You need to create a really complicated stored procedure. Pass insert/delete/update and the columns we need to insert/delete/update as
parameters into the stored procedure. When we click "View Report", the stored procedure will execute so that we can execute insert/delete/update inside of the stored procedure. Please take a reference to two related articles below:
Update Tables with Reporting Services – T-SQL Tuesday #005
SQL Server: Using SQL Server Reporting Services to Manage Data
If you have any question, please feel free to ask.
Best Regards,
Simon Hou

Get the arrow on column header data table

<t:commandSortHeader columnName="spclMngmtAreaNm" arrow="true"
                              immediate="true">i am using <t:commandSortHeader with t:dataTable ,
when form intialize this arrow on datatable not showing.
when i click on column header only showing arrow .
how to show arrow on datatable column by form inilize.
thanks
siva

The easiest way to do this: set a default value for the sort column in your backing bean.
Example:
     private String sortColumn="firstName";
     public String getSortColumn() {
          return sortColumn;
     <t:dataTable sortColumn="#{yourBean.sortColumn}" ... />On page load, the arrow is set by default to the firstname column.
Best Regards,
Dimi

Workflow Manager with Project Server error Exception Starting Workflow: The value for column _WORKFLOW_INSTANCE_UID_ in table _WorkflowInstance_ is DBNull

Hello,
The project server workflows were running fine on my servers (2 App and 2 WFE). suddenly workflows are not working anymore.
and I am getting the below error:
DBNull.. Trace: at Microsoft.Office.Project.Server.Schema.WorkflowDataSet.WorkflowInstanceRow.get_WORKFLOW_INSTANCE_UID() at Microsoft.Office.Project.Server.BusinessLayer.Workflow.StartWorkflow(Guid projectGuid, Guid enterpriseProjectTypeUid, Boolean
isNewProject, Guid previousEntepriseProjectTypeUid, Boolean skipStage, Guid stageToSkipTo):
WorkflowExceptionStartingWorkflow (35115). Details: id='35115' name='WorkflowExceptionStartingWorkflow' uid='047a6f2d-8a44-e411-8bf4-0050568b37eb'.
I checked all DBs; all running fine. Also I tried to re-register the workflow with my site collection. but nothing worked.
Any suggestions?
Twitter : @MShoubaki | http://jo.linkedin.com/in/mshoubaki

Hi Mohammad,
I was able to resolve my issue by installing KB2880963. I did not have any of the other updates mentioned installed, but it did resolve the issue.
Note: I did need to restart my servers.
See Below from
http://social.technet.microsoft.com/Forums/windowsserver/en-US/b189e4b8-bb9e-4ade-a3d5-cd2e0f90e93f/workflow-not-working-after-installing-service-pack-1-and-patches?forum=sharepointadmin
Here is
the security update which you will need to install.
Update 2880963 for SharePoint Server 2013
http://support.microsoft.com/kb/2880963
Chcek the link for details.
http://expertsharepoint.blogspot.de/2014/08/workflow-not-working-after-installing.html

Join query to get the constraint type ,column type and table name

Hi ,This is my query
select
table_name , column_name from user_cons_columns where table_name='EMP_CLASS'
table_name     column_name
emp_class        empno
emp_class        deptno
select constraint_type,table_name from user_constraints where table_name='EMP_CLASS'
constraint_type    table_name
p                        emp_class
u                        emp_class
I need query for this out put combining above two query.
constraint_type        column_name   table_name
p                             empno            emp_class
u                            deptno             emp_classThanks,
Deekay.

Hi,
Try this:
select a.table_name , a.column_name ,b.constraint_type from user_cons_columns a, user_constraints b
where a.table_name=b.table_name and a.table_name='EMP_CLASS'How about reading the JOIN documentation??
http://download.oracle.com/docs/cd/E11882_01/server.112/e10592/queries006.htm#SQLRF30046
Cheers,
Avinash

How to: Count columns in a table?

Quite simple question actually. How do I count the number of columns in a table using SQL?

For AdventureWorks2012 tables & views:
SELECT TABLE_CATALOG, TABLE_SCHEMA, TABLE_NAME, COUNT(COLUMN_NAME ) ColCount
FROM INFORMATION_SCHEMA.COLUMNS
GROUP BY TABLE_CATALOG, TABLE_SCHEMA, TABLE_NAME
ORDER BY TABLE_CATALOG, TABLE_SCHEMA, TABLE_NAME;
TABLE_SCHEMA TABLE_NAME ColCount
dbo AWBuildVersion 4
dbo DatabaseLog 8
dbo ErrorLog 9
HumanResources Department 4
HumanResources Employee 16
HumanResources EmployeeDepartmentHistory 6
HumanResources EmployeePayHistory 5
HumanResources JobCandidate 4
HumanResources Shift 5
HumanResources vEmployee 18
HumanResources vEmployeeDepartment 10
HumanResources vEmployeeDepartmentHistory 11
HumanResources vJobCandidate 16
HumanResources vJobCandidateEducation 13
HumanResources vJobCandidateEmployment 11
Person Address 9
Person AddressType 4
Person BusinessEntity 3
Person BusinessEntityAddress 5
Person BusinessEntityContact 5
Person ContactType 3
Person CountryRegion 3
Person EmailAddress 5
Person Password 5
Person Person 13
Person PersonPhone 4
Person PhoneNumberType 3
Person StateProvince 8
Person vAdditionalContactInfo 17
Person vStateProvinceCountryRegion 7
Production BillOfMaterials 9
Production Culture 3
Production Document 14
Production Illustration 3
Production Location 5
Production Product 25
Production ProductCategory 4
Production ProductCostHistory 5
Production ProductDescription 4
Production ProductDocument 3
Production ProductInventory 7
Production ProductListPriceHistory 5
Production ProductModel 6
Production ProductModelIllustration 3
Production ProductModelProductDescriptionCulture 4
Production ProductPhoto 6
Production ProductProductPhoto 4
Production ProductReview 8
Production ProductSubcategory 5
Production ScrapReason 3
Production TransactionHistory 9
Production TransactionHistoryArchive 9
Production UnitMeasure 3
Production vProductAndDescription 5
Production vProductModelCatalogDescription 25
Production vProductModelInstructions 11
Production WorkOrder 10
Production WorkOrderRouting 12
Purchasing ProductVendor 11
Purchasing PurchaseOrderDetail 11
Purchasing PurchaseOrderHeader 13
Purchasing ShipMethod 6
Purchasing Vendor 8
Purchasing vVendorWithAddresses 9
Purchasing vVendorWithContacts 12
Sales CountryRegionCurrency 3
Sales CreditCard 6
Sales Currency 3
Sales CurrencyRate 7
Sales Customer 7
Sales PersonCreditCard 3
Sales SalesOrderDetail 11
Sales SalesOrderHeader 26
Sales SalesOrderHeaderSalesReason 3
Sales SalesPerson 9
Sales SalesPersonQuotaHistory 5
Sales SalesReason 4
Sales SalesTaxRate 7
Sales SalesTerritory 10
Sales SalesTerritoryHistory 6
Sales ShoppingCartItem 6
Sales SpecialOffer 11
Kalman Toth Database & OLAP Architect
sqlusa.com
Paperback / Kindle: Pass SQL Exam 70-461 & Job Interview: Programming SQL Server 2012

Count the No.of Columns in a Table

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