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Ignore parameter if no value entered

MikeM670 asked
Last Modified: 2016-09-08
Crystal Reports IX
SQL 2014

I have a report with multiple parameter values.  There are four parameter's that check on single field.  I want to allow the report to ignore any of the second, third or fourth parameter's that are left blank if they are not needed in the query.

First the field I wish to search:
Table: CaseMaster
Field: UCRCodeAll  varchar()   Allows Nulls but would need to check for both NULLS or ""

A hardcoded query looks like this:
(({CaseMaster.UCRCodeAll} like "*8028*") or ({CaseMaster.UCRCodeAll} like "*5060*"))

A Parameter based query that requires the user to enter a value.
(({CaseMaster.UCRCodeAll} like "*" & {?UCR Code 1} & "*")
or ({CaseMaster.UCRCodeAll} like "*" & {?UCR Code 2} & "*"))

UCRCodeAll data looks like this:


Data would be returned on the 1st - 3rd row.

The parameter fields are:
UCR Code 1
UCR Code 2
UCR Code 3
UCR Code 4
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