From 0044724a629b7d41e6a22644046c13c77c6fbae0 Mon Sep 17 00:00:00 2001
From: Hui Li <52318143+plum-lihui@users.noreply.github.com>
Date: Tue, 12 Oct 2021 17:49:36 +0800
Subject: [PATCH] Update docs.md

---
 documentation20/cn/12.taos-sql/docs.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/documentation20/cn/12.taos-sql/docs.md b/documentation20/cn/12.taos-sql/docs.md
index 6eecdae8fa..4d0f1f9af2 100644
--- a/documentation20/cn/12.taos-sql/docs.md
+++ b/documentation20/cn/12.taos-sql/docs.md
@@ -756,7 +756,7 @@ Query OK, 1 row(s) in set (0.001091s)
 
    **正则表达式规范**
 
-   确保使用的正则表达式符合POSIX的规范，具体规范内容可参见[](https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap09.html)
+   确保使用的正则表达式符合POSIX的规范，具体规范内容可参见[Regular Expressions](https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap09.html)
 
    **使用限制**
 
-- 
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