- Non-standard alternative:
minus - Explicit keyword
distinctnot supported - Requires the keyword
distinctexplicitly
The table operator except [distinct] returns the rows of the first result except those that are also in the second.
SELECT ...
FROM ...
EXCEPT DISTINCT
SELECT ...
FROM ...As with all table operators both sides of except must have the same number of columns and their types must be compatible based on their position (see corresponding). All null values are considered being the same (not distinct) for this operation.
If a row exists in the second result it will not appear in the final result—not even if it is multiple times in the first result.
Related
Other table operators:
Union:
union [distinct],union allIntersect:
intersect [distinct],intersect all
Normative References
The except [distinct] operator is defined in ISO/IEC 9075-2:2023 as the mandatory feature E071-03, "EXCEPT DISTINCT table operator".
