cherry pick pingcap#5268 to release-5.0

Signed-off-by: ti-srebot <ti-srebot@pingcap.com>
ti-srebot · Apr 19, 2021 · a5b200c · a5b200c
1 parent 12a1ea3
commit a5b200c
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diff --git a/user-defined-variables.md b/user-defined-variables.md
@@ -178,4 +178,8 @@ SELECT @col FROM t;
 +------+
 ```
 
+## MySQL compatibility
+
+Except for `SELECT ... INTO <variable>`, the syntax supported in MySQL and TiDB is identical.
+
 For more information, see [User-Defined Variables in MySQL](https://dev.mysql.com/doc/refman/5.7/en/user-variables.html).