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nexedi
MariaDB
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f5c4daf5
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f5c4daf5
authored
Sep 04, 2002
by
unknown
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A small explanation regarding comparison of ENUM and SET values
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Docs/manual.texi
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f5c4daf5
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@@ -33868,6 +33868,11 @@ Returns the minimum or maximum value of @code{expr}. @code{MIN()} and
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@@ -33868,6 +33868,11 @@ Returns the minimum or maximum value of @code{expr}. @code{MIN()} and
@code{MAX()} may take a string argument; in such cases they return the
@code{MAX()} may take a string argument; in such cases they return the
minimum or maximum string value. @xref{MySQL indexes}.
minimum or maximum string value. @xref{MySQL indexes}.
There is one inconsistency in MySQL in handling @code[ENUM] and @code[SET]
types when it comes to @code{MIN()}, @code{MAX()} and other aggregating
functions. MySQL will compare values based on string values of the columns,
instead of it's relative position. This will be fixed in future.
@example
@example
mysql> SELECT student_name, MIN(test_score), MAX(test_score)
mysql> SELECT student_name, MIN(test_score), MAX(test_score)
-> FROM student
-> FROM student
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