D J Horton Consulting Ltd

Personal reference to useful tips and tricks for SQL Server, SQL Server Reporting Services and Crystal Reports.



My alternative to scraps of paper lying about.



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Tuesday, 30 November 2010

Converting Datetime values to various formats - SQL

Using the CONVERT function in SQL Server 2005 the following datetime formats can be produced:


SELECT
GETDATE() AS UnconvertedDateTimeUsingGetDate,
CURRENT_TIMESTAMP AS UnconvertedDateTimeUsingCurrentTimestamp,
CAST(GETDATE() AS nvarchar(30)) AS UsingCast,
CONVERT(nvarchar(30), GETDATE(), 100) AS [Default mon dd yyyy hh:miAM (or PM)],
CONVERT(nvarchar(30), GETDATE(), 101) AS [USA mm/dd/yy],
CONVERT(nvarchar(30), GETDATE(), 102) AS [ANSI yy.mm.dd],
CONVERT(nvarchar(30), GETDATE(), 103) AS [British/French dd/mm/yy],
CONVERT(nvarchar(30), GETDATE(), 104) AS [German dd.mm.yy],
CONVERT(nvarchar(30), GETDATE(), 105) AS [Italian dd-mm-yy],
CONVERT(nvarchar(30), GETDATE(), 106) AS [dd mon yy],
CONVERT(nvarchar(30), GETDATE(), 107) AS [Mon dd, yy],
CONVERT(nvarchar(30), GETDATE(), 108) AS [hh:mm:ss],
CONVERT(nvarchar(30), GETDATE(), 109) AS [Default+milliseconds mon dd yyyy hh:mi:ss:mmmAM (or PM)],
CONVERT(nvarchar(30), GETDATE(), 110) AS [USA mm-dd-yy],
CONVERT(nvarchar(30), GETDATE(), 111) AS [Japan yy/mm/dd],
CONVERT(nvarchar(30), GETDATE(), 112) AS [ISO yymmdd],
CONVERT(nvarchar(30), GETDATE(), 113) AS [Europe default + milliseconds dd mon yyyy hh:mm:ss:mmm(24h)],
CONVERT(nvarchar(30), GETDATE(), 114) AS [hh:mi:ss:mmm(24h)],
CONVERT(nvarchar(30), GETDATE(), 120) AS [ODBC canonical yyyy-mm-dd hh:mi:ss(24h)],
CONVERT(nvarchar(30), GETDATE(), 121) AS [ODBC canonical (with milliseconds) yyyy-mm-dd hh:mi:ss.mmm(24h)],
CONVERT(nvarchar(30), GETDATE(), 126) AS [ISO8601 yyyy-mm-dd Thh:mm:ss.mmm(no spaces)],
CONVERT(nvarchar(30), GETDATE(), 130) AS [Hijri**** dd mon yyyy hh:mi:ss:mmmAM],
CONVERT(nvarchar(30), GETDATE(), 131) AS [ Hijri**** dd/mm/yy hh:mi:ss:mmmAM]

Wednesday, 24 November 2010

Create a CTE list of dates on the fly - SQL

CTE list of dates on the fly:

WITH D AS
(
SELECT number AS rn FROM master.dbo.spt_values
WHERE type = 'P' AND number BETWEEN 0 AND 29
)
SELECT DATEADD(dd, -D.rn, DATEADD(dd, DATEDIFF(dd,0,GETDATE()), 0)) AS ReportDate
FROM D;


2000/pre CTE solution here

Tuesday, 23 November 2010

Create a list of dates on the fly - SQL

I've recently had the requirement to produce a list of the last 30 days on the fly (I didn't have the option to refer to a 'Numbers' table). This was to be used as a 'Command' in Crystal Reports and joined to a database table to produce 'missing dates'.

Using the system table, spt_values, the first stage was to produce a list of numbers:

SELECT number AS rn FROM master.dbo.spt_values
WHERE type = 'P' AND number BETWEEN 0 AND 29

This is then extended to produce a list of the last 30 dates.

SELECT DATEADD(dd, -D.rn, DATEADD(dd, DATEDIFF(dd,0,GETDATE()), 0)) AS ReportDate
FROM (
SELECT number AS rn FROM master.dbo.spt_values
WHERE type = 'P' AND number BETWEEN 0 AND 29
) AS D

This was with help from both Chris Morris & Kevin McKelvey at http://www.sqlservercentral.com/

CTE solution here



 

Monday, 15 November 2010

DateName function - SQL

SELECT DATENAME(month, GETDATE()) AS 'MonthName';

Wednesday, 10 November 2010

Column aliases and derived tables in TSQL 2005 - SQL

SELECT YearMonth, COUNT(JobLogID) AS JobCount
FROM
(SELECT JobLogID, CONVERT(VARCHAR(7), JobLogSignOffTimeStamp, 121) AS YearMonth
FROM JobLog WHERE JobLogSignOff ='1') AS J
GROUP BY YearMonth
ORDER BY YearMonth;

Monday, 1 November 2010

Row numbering in TSQL 2005 - SQL

New to SQL Server 2005 is ROW_NUMBER function.

SELECT
JobLog.JobLogID,
Establishment.EstablishmentName,
JobSubType.JobSubTypeDescription,
JobLog.JobLogSignOffTimeStamp,
ROW_NUMBER() OVER(ORDER BY EstablishmentName ) AS rownumNonDeterministic,
ROW_NUMBER() OVER(ORDER BY EstablishmentName,JobLog.JobLogSignOffTimeStamp ) AS rownumDeterministic,
ROW_NUMBER() OVER(PARTITION BY EstablishmentName ORDER BY EstablishmentName,JobLog.JobLogSignOffTimeStamp ) AS rownumPartitioning
FROM JobLog
INNER JOIN
Establishment ON JobLog.JobLog_EstablishmentID = Establishment.EstablishmentID  
INNER JOIN
JobSubType ON JobLog.JobLog_JobSubTypeID = JobSubType.JobSubTypeID
WHERE JobLog.JobLogSignOff = '1'
ORDER BY EstablishmentName,JobLog.JobLogSignOffTimeStamp