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Difference between mysql uion and unionall

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The difference between uion and unionall in mysql the main difference between uion and unionall is that unionall directly merges the result set, but performs distinct for the result after unionall, results After Repeated Records are removed.

The difference between uion and union all in mysql the main difference between uion and union all is that union all directly merges result sets, instead, union performs a distinct operation on the results of union all to remove the results of Repeated Records.

Difference between mysql uion and union all
The main difference between uion and union all is that union all directly merges the result sets. Rather, union performs a distinct operation on the results after union all to remove the results after repeated records.

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