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link from EXISTS to WHERE

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Alexey 2021-11-13 20:00:00 +00:00
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docs/en/sql-reference/operators/exists.md
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@ -2,6 +2,8 @@
The `EXISTS` operator tests how many records are in the result of a subquery. If it is empty, then the operator returns `0`. Otherwise it returns `1`.
`EXISTS` can be used in a [WHERE](../../sql-reference/statements/select/where.md) clause.
!!! warning "Warning"
References to main query tables and columns are not supported in a subquery.