SQL Snippet: Generate Row Numbers

Microsoft SQL ServerIf you’ve been following this blog, you’ll know that I write a fair bit of SQL. I’m going to post some small snippets of SQL which I had to work out how to accomplish a small task as part of a larger script.

In thi spost, I am going to show how use ROW_NUMBER to generate a unique row number. There are three examples of code.

This first example, the simplest of the three, shows how to generate a unique number for each row in the recordset:

/*
Created by Ian Grieve of azurecurve|Ramblings of a Dynamics GP Consultant (http://www.azurecurve.co.uk)
This code is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike 2.0 UK: England & Wales (CC BY-NC-SA 2.0 UK).
*/
SELECT
	PONUMBER
	,ORD
	,ITEMNMBR
	,ITEMDESC
	,ROW_NUMBER() OVER(ORDER BY PONUMBER, ORD ASC) AS CUSTOM_ROW_ID
FROM
	POP30110
GO

The second example, shows a row number can be assigned to the lines of each transaction (this is accomplished :

/*
Created by Ian Grieve of azurecurve|Ramblings of a Dynamics GP Consultant (http://www.azurecurve.co.uk)
This code is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike 2.0 UK: England & Wales (CC BY-NC-SA 2.0 UK).
*/
SELECT
	PONUMBER
	,ORD
	,ITEMNMBR
	,ITEMDESC
	,ROW_NUMBER() OVER(PARTITION BY PONUMBER ORDER BY PONUMBER, ORD ASC) AS CUSTOM_ROW_ID
FROM
	POP30110
GO

This final example, takes the first example and shows how we can select a range of row numbers (this is useful if you are selecting data to display on a page):

/*
Created by Ian Grieve of azurecurve|Ramblings of a Dynamics GP Consultant (http://www.azurecurve.co.uk)
This code is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike 2.0 UK: England & Wales (CC BY-NC-SA 2.0 UK).
*/
WITH POTRX AS
	(SELECT
		PONUMBER
		,ORD
		,ITEMNMBR
		,ITEMDESC
		,ROW_NUMBER() OVER(ORDER BY PONUMBER ORDER BY PONUMBER, ORD ASC) AS CUSTOM_ROW_ID
	FROM
		POP30110)
SELECT
	*
FROM
	POTRX
WHERE
	CUSTOM_ROW_ID BETWEEN 40 AND 59
GO

SQL Snippet: Format Dates

Microsoft SQL ServerIf you’ve been following this blog, you’ll know that I write a fair bit of SQL. I’m going to post some small snippets of SQL which I had to work out how to accomplish a small task as part of a larger script.

This second example, shows how to format a date in two of the most common formats I work with. Each example returns the date using the FORMAT command introduced in SQL Server 2012 and the more traditional method.

The first example, returns the date as day month year separated with /:

/*
Created by Ian Grieve of azurecurve|Ramblings of a Dynamics GP Consultant (http://www.azurecurve.co.uk)
This code is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike 2.0 UK: England & Wales (CC BY-NC-SA 2.0 UK).
*/
DECLARE @DATE DATETIME = '2017-05-31 11:59:59.000'

SELECT
	CONVERT(VARCHAR(10), @DATE, 103)
	,FORMAT(@DATE, 'dd/MM/yyyy')

The second returns the date in ISO 8601 format:

/*
Created by Ian Grieve of azurecurve|Ramblings of a Dynamics GP Consultant (http://www.azurecurve.co.uk)
This code is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike 2.0 UK: England & Wales (CC BY-NC-SA 2.0 UK).
*/
DECLARE @DATE DATETIME = '2017-05-31 11:59:59.000'

SELECT
	CONVERT(VARCHAR(10), @DATE, 126)
	,FORMAT(@DATE, 'yyyy-MM-dd')

SQL Snippet: Return Comma Delimited String

Microsoft SQL ServerIf you’ve been following this blog, you’ll know that I write a fair bit of SQL. I’m going to post some small snippets of SQL which I had to work out how to accomplish a small task as part of a larger script.

This first example, shows how to return a comma delimited string of vlues from a select instead of the usual multiline recordset:

/*
Created by Ian Grieve of azurecurve|Ramblings of a Dynamics GP Consultant (http://www.azurecurve.co.uk)
This code is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike 2.0 UK: England & Wales (CC BY-NC-SA 2.0 UK).
*/
DECLARE @DOCDATE DATETIME = '2017-04-12'
SELECT (STUFF((
        SELECT
			', ' + RTRIM(CNTRLNUM)
        FROM
			PM00400
        WHERE
			DOCDATE = @DOCDATE
        ORDER BY
			CNTRLNUM
        FOR XML PATH('')
        ), 1, 2, '')
    ) AS ReturnString

The example above, is created against the Microsoft Dynamics GP sample database and returns a comma delimited list of vouchers for a particular date.