Hi - I am trying to use a select statement to select where empty(blank) memo fields. I am using vfp 8.0 with a sql server backend. so using the empty() function with the foxpro backend works but doesn't with sql server. Any help for selecting blank memo fields would be great. Thanks
oh here's an example of my statement - prono is the memo field type.
"SELECT ornum AS sono, invno " + ;
"FROM " + go_SQL.cmpa_armast.sc_tabl
" WHERE EMPTY(prono) " + ;
"AND NOT EMPTY(ornum) " + ;
"AND EMPTY(artype)"
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Technically, you could get the same error in VFP IF you set the properties for the memo field where it would allow NULLs. Generally, most developers (none that I know of) do that with a VFP memo field. Since the SQL Server back-end is a text field or at least something non-memo field like that allows NULL values, you can't possibly have the same command for both environments when the possibility of a NULL value exists.
While I was sure VFP had an ISNULL() function, I had to check SQL Server. It has one as well to aid in evaluating whether a row in a column has a NULL value.
ISNULL (Transact-SQL)
http://msdn2.microsoft.com
i guess you need to have a different SQL-statement for when your backend is FoxPro or SQL Server... try making you SQL-statement dynamically....
This will work in SQL Server:
"SELECT ornum AS sono, invno " + ;
"FROM " + go_SQL.cmpa_armast.sc_tabl
" WHERE DATALENGTH(prono)=0 " + ;
"AND NOT EMPTY(ornum) " + ;
"AND EMPTY(artype)"
while your original SQL statement should be used for FoxPro backend.
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by: CarlWarnerPosted on 2007-03-21 at 10:50:41ID: 18765881
I am not clear what you're looking for since SQL Server doesn't have a memo field type. ????