Can we use Union to combine from more than two tables? Is there a limit on ow many?
Can we use Union to combine from more than two tables? Is there a limit on ow many?
I believe the limit is on the overall size of the query, not the number of unions, but don't quote me on that. I've done 15 or so for a specialized report.
I hit a limit of 50 SELECT lines in one UNION.
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