Update 1.explain-and-profile.md

docs-2.0/3.ngql-guide/17.query-tuning-statements/1.explain-and-profile.md

@@ -17,13 +17,13 @@
 - `EXPLAIN`
 
     ```ngql
-    EXPLAIN [format= {"row" | "dot"}] <your_nGQL_statement>;
+    EXPLAIN [format= {"row" | "dot" | "tck"}] <your_nGQL_statement>;
     ```
 
 - `PROFILE`
 
     ```ngql
-    PROFILE [format= {"row" | "dot"}] <your_nGQL_statement>;
+    PROFILE [format= {"row" | "dot" | "tck"}] <your_nGQL_statement>;
     ```
 
 ## 输出格式
@@ -114,18 +114,49 @@ Execution Plan
 
 ## `tck`格式
 
-基于查询语句生成用于测试的 tck 特征文件内容。
+`tck`格式类似于表格，但是没有边框和行之间的间的分割线。用户可以将结果用在单元测试的测试用例中。
+关于`tck`格式的测试用例,可以查看：https://github.com/vesoft-inc/nebula-graph/tree/master/tests#how-to-add-test-case
 
-```ngql
-nebula> PROFILE format="tck" FETCH PROP ON player "player_1","player_2","player_3" yield properties(vertex).name AS name, properties(vertex).age AS age;
+- `EXPLAIN`
 
-| name         | age |
-| "Piter Park" | 24  |
-| "aaa"        | 24  |
-| "ccc"        | 24  |
+    ```ngql
+    nebula> EXPLAIN format="tck" FETCH PROP ON player "player_1","player_2","player_3" yield properties(vertex).name as name, properties(vertex).age as age;
+    Execution succeeded (time spent 261µs/613.718µs)
 
-Got 3 rows (time spent 1.784ms/2.298714ms)
+    Execution Plan (optimize time 28 us)
 
-Execution Plan (optimize time 46 us)
-```
 
+    | id | name        | dependencies | profiling data | operator info |
+    |  2 | Project     | 1            |                |               |
+    |  1 | GetVertices | 0            |                |               |
+    |  0 | Start       |              |                |               |
+                                                          
+
+    Wed, 22 Mar 2023 23:15:52 CST
+
+    ```
+
+- `PROFILE`
+
+    ```ngql
+    nebula> PROFILE format="tck" FETCH PROP ON player "player_1","player_2","player_3" yield properties(vertex).name as name, properties(vertex).age as age;
+
+    | name         | age |
+    | "Piter Park" | 24  |
+    | "aaa"        | 24  |
+    | "ccc"        | 24  |
+
+    Got 3 rows (time spent 1.474ms/2.19677ms)
+
+    Execution Plan (optimize time 41 us)
+
+
+    | id | name        | dependencies | profiling data                                                                                                      | operator info |
+    |  2 | Project     | 1            | {"rows":3,"version":0}                                                                                              |               |
+    |  1 | GetVertices | 0            | {"resp[0]":{"exec":"232(us)","host":"127.0.0.1:9779","total":"758(us)"},"rows":3,"total_rpc":"875(us)","version":0} |               |
+    |  0 | Start       |              | {"rows":0,"version":0}                                                                                              |               |
+
+
+    Wed, 22 Mar 2023 23:16:13 CST
+
+    ```