Revert "Revert "added guide""

This reverts commit d9f5b37.

Author: soyeric128

docs/en/guides/54-query/08-stored-procedure.md

@@ -0,0 +1,92 @@
+---
+title: Stored Procedure
+---
+
+A stored procedure is a set of executable commands or logic blocks stored within the database, written in SQL or other programming languages, designed to be reusable for efficiently performing specific tasks or operations.
+
+## Supported Languages
+
+**Databend currently supports [SQL scripting](#sql-scripting) only**. Using SQL scripting, users can define procedures with control flow constructs like loops (FOR, WHILE, REPEAT) and conditionals (IF, CASE), enabling complex logic and effective multi-step operations.
+
+### SQL Scripting
+
+In Databend, stored procedures support a rich set of features to allow users to define complex operations through SQL scripting. Here are the supported capabilities:
+
+- **Variable Declaration**: Variables can be declared using the `LET` keyword, followed by the variable name, an optional type, and the initial value.
+
+    ```sql title='Examples:'
+    LET x := 100;
+    ```
+
+- **Query Execution**: SQL queries can be executed within the script, and results can be stored in variables or result sets.
+
+    ```sql title='Examples:'
+    LET result RESULTSET := SELECT * FROM t1;
+    ```
+
+- **Control Flow Constructs**
+  - **FOR Loop**: Iterates over a range or a result set.
+
+    ```sql title='Examples:'
+    FOR i IN 1..10 DO ... END FOR;
+    ```
+
+  - **WHILE Loop**: Executes a block of code as long as a specified condition is true.
+
+    ```sql title='Examples:'
+    WHILE condition DO ... END WHILE;
+    ```
+
+  - **REPEAT Loop**: Executes a block of code until a condition is met.
+
+    ```sql title='Examples:'
+    REPEAT ... UNTIL condition END REPEAT;
+    ```
+
+  - **LOOP**: Executes a block of code indefinitely until a `BREAK` statement is encountered.
+
+    ```sql title='Examples:'
+    LOOP ... END LOOP;
+    ```
+
+  - **CASE Statement**: Allows conditional execution of code blocks based on different conditions.
+
+    ```sql title='Examples:'
+    CASE [operand]
+    WHEN condition1 THEN ...
+    WHEN condition2 THEN ...
+    ELSE ...
+    END;
+    ```
+
+  - **IF Statement**: Executes a block of code based on a condition.
+
+    ```sql title='Examples:'
+    IF condition THEN ...
+    ELSEIF condition THEN ...
+    ELSE ...
+    END IF;
+    ```
+
+- **RETURN**: Returns from the script with an optional value.
+
+    ```sql title='Examples:'
+    RETURN [expr];
+    ```
+
+- **RETURN TABLE**: Returns from the script with a table result.
+
+    ```sql title='Examples:'
+    RETURN TABLE(result_set_name | SELECT ...);
+    ```
+
+- **Comments**
+  - **Single-line comments**: `-- comment`
+  - **Multi-line comments**: `/* comment */`
+
+## Managing Stored Procedures
+
+Databend offers a range of commands for managing stored procedures. For more details, see [Stored Procedure](/sql/sql-commands/ddl/procedure/).
+
+## Usage Example
+

docs/en/sql-reference/10-sql-commands/00-ddl/18-procedure/_category_.json

@@ -1,3 +1,3 @@
 {
-  "label": "Procedure"
+  "label": "Stored Procedure"
 }

docs/en/sql-reference/10-sql-commands/00-ddl/18-procedure/index.md

@@ -1,8 +1,8 @@
 ---
-title: Procedure
+title: Stored Procedure
 ---
 import IndexOverviewList from '@site/src/components/IndexOverviewList';
 
-This page provides reference information for the procedure-related commands in Databend.
+This page provides reference information for the stored procedure-related commands in Databend.
 
 <IndexOverviewList />