diff --git a/docs/.vuepress/sidebar/en.js b/docs/.vuepress/sidebar/en.js
index e59ce6d32f..7c60858788 100644
--- a/docs/.vuepress/sidebar/en.js
+++ b/docs/.vuepress/sidebar/en.js
@@ -345,10 +345,6 @@ module.exports = [
               "concat_ws",
               "ends_with",
               "find_in_set",
-              "get_json_double",
-              "get_json_int",
-              "get_json_string",
-              "group_concat",
               "hex",
               "instr",
               "lcase",
@@ -396,6 +392,7 @@ module.exports = [
             directoryPath: "aggregate-functions/",
             children: [
               "approx_count_distinct",
+              "group_concat",
               "avg",
               "bitmap_union",
               "count",
@@ -455,6 +452,18 @@ module.exports = [
               "bitnot"
             ],
           },
+          {
+            title: "json function",
+            directoryPath: "json-functions/",
+            children: [
+              "get_json_double",
+              "get_json_int",
+              "get_json_string",
+              "json_array",
+              "json_object",
+              "json_quote",
+            ],
+          },
           {
             title: "Encryption and Digest Functions",
             directoryPath: "encrypt-digest-functions/",
diff --git a/docs/.vuepress/sidebar/zh-CN.js b/docs/.vuepress/sidebar/zh-CN.js
index d7a4bf1be3..9ca42dba91 100644
--- a/docs/.vuepress/sidebar/zh-CN.js
+++ b/docs/.vuepress/sidebar/zh-CN.js
@@ -349,10 +349,6 @@ module.exports = [
               "concat_ws",
               "ends_with",
               "find_in_set",
-              "get_json_double",
-              "get_json_int",
-              "get_json_string",
-              "group_concat",
               "hex",
               "instr",
               "lcase",
@@ -400,6 +396,7 @@ module.exports = [
             directoryPath: "aggregate-functions/",
             children: [
               "approx_count_distinct",
+              "group_concat",
               "avg",
               "bitmap_union",
               "count",
@@ -459,6 +456,18 @@ module.exports = [
               "bitnot"
             ],
           },
+          {
+            title: "json 函数",
+            directoryPath: "json-functions/",
+            children: [
+              "get_json_double",
+              "get_json_int",
+              "get_json_string",
+              "json_array",
+              "json_object",
+              "json_quote",
+            ],
+          },
           {
             title: "Hash函数",
             directoryPath: "hash-functions/",
diff --git a/docs/en/sql-reference/sql-functions/string-functions/group_concat.md b/docs/en/sql-reference/sql-functions/aggregate-functions/group_concat.md
similarity index 86%
rename from docs/en/sql-reference/sql-functions/string-functions/group_concat.md
rename to docs/en/sql-reference/sql-functions/aggregate-functions/group_concat.md
index 0a2cefa64a..bdff73360b 100644
--- a/docs/en/sql-reference/sql-functions/string-functions/group_concat.md
+++ b/docs/en/sql-reference/sql-functions/aggregate-functions/group_concat.md
@@ -1,6 +1,6 @@
 ---
 {
-    "title": "group_concat",
+    "title": "GROUP_CONCAT",
     "language": "en"
 }
 ---
@@ -28,7 +28,7 @@ under the License.
 ## description
 ### Syntax
 
-`VARCHAR group_concat(VARCHAR str[, VARCHAR sep])`
+`VARCHAR GROUP_CONCAT(VARCHAR str[, VARCHAR sep])`
 
 
 This function is an aggregation function similar to sum (), and group_concat links multiple rows of results in the result set to a string. The second parameter, sep, is a connection symbol between strings, which can be omitted. This function usually needs to be used with group by statements.
@@ -45,16 +45,16 @@ mysql> select value from test;
 | c     |
 +-------+
 
-mysql> select group_concat(value) from test;
+mysql> select GROUP_CONCAT(value) from test;
 +-----------------------+
-| group_concat(`value`) |
+| GROUP_CONCAT(`value`) |
 +-----------------------+
 | a, b, c               |
 +-----------------------+
 
-mysql> select group_concat(value, " ") from test;
+mysql> select GROUP_CONCAT(value, " ") from test;
 +----------------------------+
-| group_concat(`value`, ' ') |
+| GROUP_CONCAT(`value`, ' ') |
 +----------------------------+
 | a b c                      |
 +----------------------------+
diff --git a/docs/en/sql-reference/sql-functions/string-functions/get_json_double.md b/docs/en/sql-reference/sql-functions/json-functions/get_json_double.md
similarity index 100%
rename from docs/en/sql-reference/sql-functions/string-functions/get_json_double.md
rename to docs/en/sql-reference/sql-functions/json-functions/get_json_double.md
diff --git a/docs/en/sql-reference/sql-functions/string-functions/get_json_int.md b/docs/en/sql-reference/sql-functions/json-functions/get_json_int.md
similarity index 100%
rename from docs/en/sql-reference/sql-functions/string-functions/get_json_int.md
rename to docs/en/sql-reference/sql-functions/json-functions/get_json_int.md
diff --git a/docs/en/sql-reference/sql-functions/string-functions/get_json_string.md b/docs/en/sql-reference/sql-functions/json-functions/get_json_string.md
similarity index 100%
rename from docs/en/sql-reference/sql-functions/string-functions/get_json_string.md
rename to docs/en/sql-reference/sql-functions/json-functions/get_json_string.md
diff --git a/docs/en/sql-reference/sql-functions/string-functions/json_array.md b/docs/en/sql-reference/sql-functions/json-functions/json_array.md
similarity index 100%
rename from docs/en/sql-reference/sql-functions/string-functions/json_array.md
rename to docs/en/sql-reference/sql-functions/json-functions/json_array.md
diff --git a/docs/en/sql-reference/sql-functions/string-functions/json_object.md b/docs/en/sql-reference/sql-functions/json-functions/json_object.md
similarity index 100%
rename from docs/en/sql-reference/sql-functions/string-functions/json_object.md
rename to docs/en/sql-reference/sql-functions/json-functions/json_object.md
diff --git a/docs/en/sql-reference/sql-functions/string-functions/json_quote.md b/docs/en/sql-reference/sql-functions/json-functions/json_quote.md
similarity index 100%
rename from docs/en/sql-reference/sql-functions/string-functions/json_quote.md
rename to docs/en/sql-reference/sql-functions/json-functions/json_quote.md
diff --git a/docs/zh-CN/sql-reference/sql-functions/string-functions/group_concat.md b/docs/zh-CN/sql-reference/sql-functions/aggregate-functions/group_concat.md
similarity index 86%
rename from docs/zh-CN/sql-reference/sql-functions/string-functions/group_concat.md
rename to docs/zh-CN/sql-reference/sql-functions/aggregate-functions/group_concat.md
index 1ba5fe6b45..bc435758a9 100644
--- a/docs/zh-CN/sql-reference/sql-functions/string-functions/group_concat.md
+++ b/docs/zh-CN/sql-reference/sql-functions/aggregate-functions/group_concat.md
@@ -1,6 +1,6 @@
 ---
 {
-    "title": "group_concat",
+    "title": "GROUP_CONCAT",
     "language": "zh-CN"
 }
 ---
@@ -28,7 +28,7 @@ under the License.
 ## description
 ### Syntax
 
-`VARCHAR group_concat(VARCHAR str[, VARCHAR sep])`
+`VARCHAR GROUP_CONCAT(VARCHAR str[, VARCHAR sep])`
 
 
 该函数是类似于 sum() 的聚合函数，group_concat 将结果集中的多行结果连接成一个字符串。第二个参数 sep 为字符串之间的连接符号，该参数可以省略。该函数通常需要和 group by 语句一起使用。
@@ -45,16 +45,16 @@ mysql> select value from test;
 | c     |
 +-------+
 
-mysql> select group_concat(value) from test;
+mysql> select GROUP_CONCAT(value) from test;
 +-----------------------+
-| group_concat(`value`) |
+| GROUP_CONCAT(`value`) |
 +-----------------------+
 | a, b, c               |
 +-----------------------+
 
-mysql> select group_concat(value, " ") from test;
+mysql> select GROUP_CONCAT(value, " ") from test;
 +----------------------------+
-| group_concat(`value`, ' ') |
+| GROUP_CONCAT(`value`, ' ') |
 +----------------------------+
 | a b c                      |
 +----------------------------+
diff --git a/docs/zh-CN/sql-reference/sql-functions/string-functions/get_json_double.md b/docs/zh-CN/sql-reference/sql-functions/json-functions/get_json_double.md
similarity index 100%
rename from docs/zh-CN/sql-reference/sql-functions/string-functions/get_json_double.md
rename to docs/zh-CN/sql-reference/sql-functions/json-functions/get_json_double.md
diff --git a/docs/zh-CN/sql-reference/sql-functions/string-functions/get_json_int.md b/docs/zh-CN/sql-reference/sql-functions/json-functions/get_json_int.md
similarity index 100%
rename from docs/zh-CN/sql-reference/sql-functions/string-functions/get_json_int.md
rename to docs/zh-CN/sql-reference/sql-functions/json-functions/get_json_int.md
diff --git a/docs/zh-CN/sql-reference/sql-functions/string-functions/get_json_string.md b/docs/zh-CN/sql-reference/sql-functions/json-functions/get_json_string.md
similarity index 100%
rename from docs/zh-CN/sql-reference/sql-functions/string-functions/get_json_string.md
rename to docs/zh-CN/sql-reference/sql-functions/json-functions/get_json_string.md
diff --git a/docs/zh-CN/sql-reference/sql-functions/string-functions/json_array.md b/docs/zh-CN/sql-reference/sql-functions/json-functions/json_array.md
similarity index 100%
rename from docs/zh-CN/sql-reference/sql-functions/string-functions/json_array.md
rename to docs/zh-CN/sql-reference/sql-functions/json-functions/json_array.md
diff --git a/docs/zh-CN/sql-reference/sql-functions/string-functions/json_object.md b/docs/zh-CN/sql-reference/sql-functions/json-functions/json_object.md
similarity index 100%
rename from docs/zh-CN/sql-reference/sql-functions/string-functions/json_object.md
rename to docs/zh-CN/sql-reference/sql-functions/json-functions/json_object.md
diff --git a/docs/zh-CN/sql-reference/sql-functions/string-functions/json_quote.md b/docs/zh-CN/sql-reference/sql-functions/json-functions/json_quote.md
similarity index 100%
rename from docs/zh-CN/sql-reference/sql-functions/string-functions/json_quote.md
rename to docs/zh-CN/sql-reference/sql-functions/json-functions/json_quote.md