diff --git a/表达式函数.md b/表达式函数.md
index de58634..fd931ae 100644
--- a/表达式函数.md
+++ b/表达式函数.md
@@ -10,7 +10,7 @@ var t1 = fsql.Select<T>()
 //WHERE (a.`Id` in (1,2,3))
 ```
 
-> 已优化，防止 where in 元素多过的 SQL 错误
+> 已优化，防止 where in 元素多过的 SQL 错误，如：[Err] ORA-01795: maximum number of expressions in a list a 1000
 
 原来：where id in (1..1333)