February 21, 2008

How to check if a date is a valid date in Sql Server 2005

At times, in our stored procedures or sql queries, we need to check if the date specified in the variables is a valid date.

Use the ISDATE() function.

The ISDATE() function determines whether the variable or the expression contains a valid date. It returns 1(true) if the input expression is a valid date; otherwise, it returns 0 (false).

For eg:
DECLARE @dt varchar(10)
SET @dt = '02/21/08'
-- Returns 1

DECLARE @dt varchar(10)
SET @dt = '13/21/08'
-- Returns 0 as 13 is not a valid month

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Suprotim Agarwal, ASP.NET Architecture MVP works as an Architect Consultant and provides consultancy on how to design and develop Web applications.

Suprotim is also the founder and primary contributor to DevCurry, DotNetCurry and SQLServerCurry. He has also written an EBook 51 Recipes using jQuery with ASP.NET Controls.

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2 Responses to "How to check if a date is a valid date in Sql Server 2005"
  1. Anonymous said...
    February 21, 2008 at 6:41 PM

    very useful..thanks.

  2. Anonymous said...
    April 20, 2009 at 11:22 PM

    Not always such a good idea, especially when you have international clients - if they use a DD/MM/YY format it will fail, and you wont know why...


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