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If-statements and count

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If-statements and count Database Management forum discussing non-database specific SQL. Structured Query Language was designed to be a robust and standardized language for manipulating relational databases.

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  #1  
Old April 28th, 2008, 05:03 PM
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If-statements and count
I'm not particularly adept in SQL :|

I want to perform some SQL under the condition that the count of a table is 0.

Something like...

Code:
IF ( (SELECT COUNT(*) FROM table1) = 0 )


Could someone help me with the syntax of this?

Thanks in advance
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  #2  
Old April 28th, 2008, 05:24 PM
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that looks fine
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Old April 29th, 2008, 08:46 AM
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It appears the if-block is ALWAYS being entered

Code:
IF ((SELECT COUNT(*) FROM table1) = 0)
BEGIN
  -- some SQL here
END


If I run the SELECT statement, I get 178683 returned. The SQL inside the BEGIN and END still gets ran.

Any ideas?
Last edited by AndyMNE : April 29th, 2008 at 10:44 AM.
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Old April 29th, 2008, 10:55 AM
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I've also tried...

Code:
IF ((SELECT COUNT(*) FROM table1) = 0)
THEN
  -- some SQL here
#LOG test
END IF
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Old April 29th, 2008, 11:17 AM
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I'm guessing #LOG isnt processed by the SQL and just runs no matter what.
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Old April 29th, 2008, 02:50 PM
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you might want to begin by telling us which DBMS you're running

and how/where you are executing that SQL

and whether you are using an application programming language where possibly you should be doing the IF logic instead
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