diff --git a/functions-and-operators/set-operators.md b/functions-and-operators/set-operators.md
index e5177dcf7012a..2c1f869e8e515 100644
--- a/functions-and-operators/set-operators.md
+++ b/functions-and-operators/set-operators.md
@@ -116,7 +116,7 @@ TiDB supports using parentheses to specify the precedence of set operations. Exp
 
 ## Use `ORDER BY` and `LIMIT`
 
-TiDB supports using [`ORDER BY`](/media/sqlgram/OrderByOptional.png) or [`LIMIT`](/media/sqlgram/LimitClause.png) clause in set operations. These two clauses must be at the end of the entire statement.
+TiDB supports using `ORDER BY` or `LIMIT` clause on the entire result of set operations. These two clauses must be at the end of the entire statement.
 
 ```sql
 (SELECT * FROM t1 UNION ALL SELECT * FROM t1 INTERSECT SELECT * FROM t2) ORDER BY a LIMIT 2;