Merge branch '3.0' of https://github.com/taosdata/TDengine into test/3.0/TS-3260

docs/en/12-taos-sql/24-show.md

@@ -129,6 +129,14 @@ SHOW QNODES;
 
 Shows information about qnodes in the system.
 
+## SHOW QUERIES
+
+```sql
+SHOW QUERIES;
+```
+
+Shows the queries in progress in the system.
+
 ## SHOW SCORES
 
 ```sql

docs/zh/12-taos-sql/24-show.md

@@ -129,6 +129,14 @@ SHOW QNODES;
 
 显示当前系统中 QNODE （查询节点）的信息。
 
+## SHOW QUERIES
+
+```sql
+SHOW QUERIES;
+```
+
+显示当前系统中正在进行的查询。
+
 ## SHOW SCORES
 
 ```sql