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Derived Column isnull with a date

Derived Column isnull with a date

Derived Column isnull with a date

In a Derived Column transformation I want to transform a date such that if it is a null then replace it with 1753-01-01 otherwise keep the date value.  However I’m getting an error.

I’m using the following expression:

ISNULL( [hrs_client_dob] ) ? 1753-01-01 00:00:00.000  :  [hrs_client_dob]

[hrs_client_dob] is being sourced from a SQL Server 2005 table and has datetime format.

The data type of the expression in the Derived Column transformation is DT_DBTimeStamp

I’ve tried double & single quotes around the date/time. I’ve tried it with no time values.  I’ve tried different data types in the Derived Column transformation.  All with no success.

What am I doing wrong?



RE: Derived Column isnull with a date

When  you are editing the Expression is it in RED or black?
Can you see the error?

RE: Derived Column isnull with a date

Thanks for responding manmaria.

The expression is in red.

If I click on OK, the Microsoft Visual Studio error is:

Error at Dim_Client [Replace Nulls[1132]]: Attempt to parse the expression “ISNULL( [hrs_client_dob] ) ? 1753-01-01 00:00:00.000  :  [hrs_client_dob]” failed.  The expression might contain an invalid token, an incomplete token, or an invalid element.  It might not be well-formed, or might be missing part of a required element such as a parenthesis.



RE: Derived Column isnull with a date

manmaria ... I've since found the solution. I needed to cast the date as per below.

ISNULL(hrs_client_dob) ? (DT_DBTIMESTAMP)"1753-01-01 00:00:00.000" : hrs_client_dob

Thanks must go to manmaria in the SQLServerCentral.com forum.



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