How to extract date fields from string/text field in sql server 2005

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There is a text filed in a table called as description. I would like to extract two date fields from this string when there is an occurrence of '~' character using sql server 2005 stored procedure. Help me out in this case.

Example: string: '长期租金;10/1/2012 ~ 10/31/2012'. At occurrence of ~ operator I would like to have from-date: 20121001 and to-date: 20121031.

Posted 21-Oct-12 23:40pm

prafulrk

Updated 22-Oct-12 7:04am

Maciej Los

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Corporal Agarn 22-Oct-12 11:39am

Is the data you are looking for always dates? Or of a given size?

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**Zoltán Zörgő** · Answer 1 · 2012-10-22T07:11:00

The easiest way is to use regular expressions. As SQL server does not support regular expressions by default, you have to extend it using .net integrated user function. It is really not complicated. See these two articles: http://msdn.microsoft.com/en-us/magazine/cc163473.aspx[^], Regular Expressions in MS SQL Server 2005/2008[^].
If this task has to be done regularly, I suggest you implement two functions based on one of the above, that extracts first of last dates directly to sql date.

Maciej Los · Answer 2 · 2012-10-22T07:10:00

Use CHARINDEX[^] function to find ~ and then LEFT[^] or RIGHT[^] or SUBSTRING[^] function to return the part of string.

For example:

SQL

DECLARE @inputstring NVARCHAR(100)
DECLARE @pos INT
DECLARE @fromdate NVARCHAR(10)
DECLARE @todate NVARCHAR(10)

SET @inputstring = '长期租金;10/01/2012 ~ 10/31/2012'
SET @pos = CHARINDEX('~', @inputstring)

IF @pos >0
    BEGIN
        SET @fromdate = SUBSTRING(@inputstring,@pos-11,10)
        SET @todate = SUBSTRING(@inputstring,@pos+1,10)
        SELECT @fromdate as [from-date], @todate as [to-date]
    END
ELSE --@pos =0
    PRINT 'There''s no matches!'

damodara naidu betha · Answer 3 · 2012-10-23T21:18:00

Hi ..,

try this batch

SQL

DECLARE @String VARCHAR(200) = '长期租金;10/1/2012 ~ 10/31/2012'

SET @String = SUBSTRING(@String,CHARINDEX(';',@String,0)+1,LEN(@String))

SELECT SUBSTRING(@String,0,CHARINDEX('~',@String,0)) [From-Date], 
SUBSTRING(@String,CHARINDEX('~',@String,0)+1,LEN(@String)) [To-Date]

Thank you

How to extract date fields from string/text field in sql server 2005

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