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Results tagged with mysql
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user 124203
All versions of MySQL (not Microsoft SQL Server). Please also add a version-specific tag like mysql-5.7 if that is relevant to the question.
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Accepted
Extract N rows from 2 tables (t1, t2) - if t1 doesn't match N rows, then (and only then) ext...
You should be able to do this by using a union to join the two queries together. This assumes that Origin is a value that signifies which table is being queried so that results from t1 take precedence …
- 69
0
votes
MySQL Select Query not using Required Index
MySQL will only use one index per table per query, on a composite index it will use the columns from left to right, the where clause needs to have the columns specified in the same order. …
- 69