Max of Dates in mysql varchar column

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hi all

i have a table in which i have a varchar column which stores date of some events. is ther any way to get the maximum and minimum dates from that column using mysql Query.
its a very old table and it contains so many records , i cant modify the schema and all since it is also used in some other applications.
dates are stored in dd-MMM-yyyy format
thank you

Posted 30-May-15 0:56am

vikaskallidantheyil

Updated 30-May-15 0:58am

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Advay Pandya · Answer 1 · 2015-05-31T21:33:00

Hi,

You can use "IsDate" function of SQL to check whether the string is in proper date format or not.

Can you please try with below query ?

VB

SELECT MAX(T.DATE)
FROM (
    SELECT CASE
            WHEN ISDATE(YourDate) = 1
                THEN CAST(YourDate AS DATE)
            ELSE NULL
            END AS DATE
    FROM YourTable
    ) T

Please let me know if you have any concern or query on this.

Thanks
Advay Pandya