SQL Query to calculate on-time dispatch with a calendar table

Hi Guys,
I have a query (view) to calculate orders' fulfillment leadtimes.
The current criteria exclude week-ends but not bank holidays therefore I have created a calendar table with a column name
isBusinessDay but I don't know how to best use this table to calculate the On-Time metric. I have been looking everywhere but so far I have been unable to solve my problem.
Please find below the current calculation for the On-Time Column:
SELECT
Week#
, ClntGroup
, CORD_DocumentCode
, DESP_DocumentCode
, Cord_Lines --#lines ordered
, CORD_Qty --total units orderd
, DESP_Lines --#lines dispatched
, DESP_Qty --total units dispatched
, Status
, d_status
, OpenDate --order open date
, DateDue
, DESP_PostedDate --order dispatched date
, DocType
, [Lead times1]
, [Lead times2]
, InFxO
, OnTime
, InFxO + OnTime AS InFullAndOneTime
, SLADue
FROM (
SELECT
DATEPART(WEEK, d.DateOpn) AS Week#
, Clients.CustCateg
, Clients.ClntGroup
, d.DocumentCode AS CORD_DocumentCode
, CDSPDocs.DocumentCode AS DESP_DocumentCode
, COUNT(CORDLines.Qnty) AS Cord_Lines
, SUM(CORDLines.Qnty) AS CORD_Qty
, COUNT(CDSPLines.Qnty) AS DESP_Lines
, SUM(CDSPLines.Qnty) AS DESP_Qty
, CDSPLines.Status
, d.Status AS d_status
, d.OpenDate
, d.DateDue
, CDSPDocs.PostDate AS DESP_PostedDate
, d.DocType
, DATEDIFF(DAY, d.OpenDate, d.DateDue) AS [Lead times1]
, DATEDIFF(DAY, d.OpenDate, CDSPDocs.PostDate) AS [Lead times2]
, CASE WHEN SUM(CORDLines.Qnty) = SUM(CDSPLines.Qnty) THEN 1 ELSE 0 END AS InFxO --in-full
--On-Time by order according to Despatch SLAs
, CASE
WHEN Clients.ClntGroup IN ('Local Market', 'Web Sales', 'Mail Order')
AND (DATEDIFF(DAY, d.OpenDate, CDSPDocs.PostDate) - (DATEDIFF(WEEK, d.OpenDate, CDSPDocs.PostDate) * 2 ) <= 2)
THEN 1
WHEN Clients.ClntGroup IN ('Export Market', 'Export Market - USA')
AND (DATEDIFF(DAY, d.OpenDate, CDSPDocs.PostDate) - (DATEDIFF(WEEK, d.OpenDate, CDSPDocs.PostDate) * 2) <= 14)
THEN 1
WHEN Clients.ClntGroup = 'Export Market' OR Clients.CustCateg = 'UK Transfer'
AND d.DateDue >= CDSPDocs.PostDate
THEN 1
ELSE 0
END AS OnTime
--SLA Due (as a control)
, CASE
WHEN Clients.ClntGroup IN ('Local Market', 'Web Sales','Mail Order') AND CDSPDocs.PostDate is Null
THEN DATEADD(DAY, 2 , d.OpenDate)
WHEN Clients.ClntGroup IN ('Export Market', 'Export Market - UK', 'Export Market - USA') OR (Clients.CustCateg = 'UK Transfer')
AND CDSPDocs.PostDate IS NULL
THEN DATEADD (DAY, 14 , d.OpenDate)
ELSE CDSPDocs.PostDate
END AS SLADue
FROM dbo.Documents AS d
INNER JOIN dbo.Clients
ON d.ObjectID = dbo.Clients.ClntID
AND Clients.ClientName NOT in ('Samples - Free / Give-aways')
LEFT OUTER JOIN dbo.DocumentsLines AS CORDLines
ON d.DocID = CORDLines.DocID
AND CORDLines.TrnType = 'L'
LEFT OUTER JOIN dbo.DocumentsLines AS CDSPLines
ON CORDLines.TranID = CDSPLines.SourceID
AND CDSPLines.TrnType = 'L'
AND (CDSPLines.Status = 'Posted' OR CDSPLines.Status = 'Closed')
LEFT OUTER JOIN dbo.Documents AS CDSPDocs
ON CDSPLines.DocID = CDSPDocs.DocID
LEFT OUTER JOIN DimDate
ON dimdate.[Date] = d.OpenDate
WHERE
d.DocType IN ('CASW', 'CORD', 'MORD')
AND CORDLines.LneType NOT IN ('Fght', 'MANF', 'Stor','PACK', 'EXPS')
AND CORDLines.LneType IS NOT NULL
AND d.DateDue <= CONVERT(date, GETDATE(), 101)
GROUP BY
d.DateOpn
,d.DocumentCode
,Clients.CustCateg
,CDSPDocs.DocumentCode
,d.Status
,d.DocType
,d.OpenDate
,d.DateReq
,CDSPDocs.PostDate
,CDSPLines.Status
,Clients.ClntGroup
,d.DocumentName
,d.DateDue
,d.DateOpn
) AS derived_table
Please find below the DimDate table
FullDateNZ HolidayNZ IsHolidayNZ IsBusinessDay
24/12/2014 NULL 0 1
25/12/2014 Christmas Day 1 0
26/12/2014 Boxing Day 1 0
27/12/2014 NULL 0 0
28/12/2014 NULL 0 0
29/12/2014 NULL 0 1
30/12/2014 NULL 0 1
31/12/2014 NULL 0 1
1/01/2015 New Year's Day 1 0
2/01/2015 Day after New Year's 1 0
3/01/2015 NULL 0 0
4/01/2015 NULL 0 0
5/01/2015 NULL 0 1
6/01/2015 NULL 0 1
This is what I get from the query:
Week# ClntGroup CORD_DocumentCode OpenDate DESP_PostedDate OnTime
52 Web Sales 123456 24/12/2014 29/12/2014 0
52 Web Sales 123457 24/12/2014 30/12/2014 0
52 Web Sales 123458 24/12/2014 29/12/2014 0
52 Local Market 123459 24/12/2014 29/12/2014 0
1 Web Sale 123460 31/12/2014 5/01/2015 0
1 Local Market 123461 31/12/2014 6/01/2015 0
As the difference between the dispatched and open date is 2 business days or less, the result I expect is this:
Week# ClntGroup CORD_DocumentCode OpenDate DESP_PostedDate OnTime
52 Web Sales 123456 24/12/2014 29/12/2014 1
52 Web Sales 123457 24/12/2014 30/12/2014 1
52 Web Sales 123458 24/12/2014 29/12/2014 1
52 Local Market 123459 24/12/2014 29/12/2014 1
1 Web Sale 123460 31/12/2014 5/01/2015 1
1 Local Market 123461 31/12/2014 6/01/2015 1
I am using SQL Server 2012
Thanks
Eric

>> The current criteria exclude week-ends but not bank holidays therefore I have created a calendar table with a column name “isBusinessDay” but I don't know how to best use this table to calculate the On-Time metric. <<
The Julian business day is a good trick. Number the days from whenever your calendar starts and repeat a number for a weekend or company holiday.
CREATE TABLE Calendar
(cal__date date NOT NULL PRIMARY KEY,
julian_business_nbr INTEGER NOT NULL,
INSERT INTO Calendar
VALUES ('2007-04-05', 42),
('2007-04-06', 43), -- good Friday
('2007-04-07', 43),
('2007-04-08', 43), -- Easter Sunday
('2007-04-09', 44),
('2007-04-10', 45); --Tuesday
To compute the business days from Thursday of this week to next
Tuesdays:
SELECT (C2.julian_business_nbr - C1.julian_business_nbr)
FROM Calendar AS C1, Calendar AS C2
WHERE C1.cal__date = '2007-04-05',
AND C2.cal__date = '2007-04-10';
We do not use flags in SQL; that was assembly language. I see from your code that you are still in a 1960's mindset. You used camelCase for a column name! It makes the eyes jump and screws up maintaining code; read the literature.
The “#” is illegal in ANSI/ISO Standard SQL and most other ISO Standards. You are writing 1970's Sybase dialect SQL! The rest of the code is a mess.
The one column per line, flush left and leading comma layout tells me you used punch cards when you were learning programming; me too! We did wrote that crap because a card had only 80 columns and uppercase only IBM 027 character sets. STOP IT, it make you
look stupid in 2015.
You should follow ISO-11179 rules for naming data elements. You failed. You believe that “status” is a precise, context independent data element name! NO!
You should follow ISO-8601 rules for displaying temporal data. But you used a horrible local dialect. WHY?? The “yyyy-mm-dd” is the only format in ANSI/ISO Standard SQL. And it is one of the most common standards embedded in ISO standards. Then you used crap
like “6/01/2015” which is varying length and ambiguous that might be “2015-06-01” or “2015-01-06” as well as not using dashes.
We need to know the data types, keys and constraints on the table. Avoid dialect in favor of ANSI/ISO Standard SQL.
And you need to read and download the PDF for:
https://www.simple-talk.com/books/sql-books/119-sql-code-smells/
>> Please find below the current calculation for the On-Time Column: <<
“No matter how far you have gone down the wrong road, turn around”
-- Turkish proverb
Can you throw out this mess and start over? If you do not, then be ready to have performance got to hell? You will have no maintainable code that has to be kludged like you are doing now? In a good schema an OUTER JOIN is rare, but you have more of them in
ONE statement than I have seen in entire major corporation databases.
--CELKO-- Books in Celko Series for Morgan-Kaufmann Publishing: Analytics and OLAP in SQL / Data and Databases: Concepts in Practice Data / Measurements and Standards in SQL SQL for Smarties / SQL Programming Style / SQL Puzzles and Answers / Thinking
in Sets / Trees and Hierarchies in SQL

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