How to call a cursor in a PL/SQL stored procedure?

2 years ago
Sophia Anderson
1 minute

To invoke a cursor in a PL/SQL stored procedure, you can follow these steps:

  1. Declare a cursor variable and associate it with a cursor in the stored procedure. For example:
DECLARE
  CURSOR cursor_name IS
    SELECT column1, column2
    FROM table_name;
BEGIN
  -- 存储过程的其他逻辑
END;
  1. Unlocked
OPEN cursor_name;
  1. Bring
FETCH cursor_name INTO variable1, variable2;
  1. Handle the data in the cursor. After getting the data in the cursor, you can process it as needed.
  2. Close the cursor. Use the CLOSE statement to close the cursor, for example:
CLOSE cursor_name;

The complete example code is as follows:

DECLARE
  CURSOR cursor_name IS
    SELECT column1, column2
    FROM table_name;
  variable1 table_name.column1%TYPE;
  variable2 table_name.column2%TYPE;
BEGIN
  OPEN cursor_name;
  
  LOOP
    FETCH cursor_name INTO variable1, variable2;
    EXIT WHEN cursor_name%NOTFOUND;
    
    -- 对游标中的数据进行处理
    -- 在此处可以使用变量variable1和variable2来访问游标中的数据
    
    -- 处理完成后，继续循环获取下一行数据
  END LOOP;
  
  CLOSE cursor_name;
  
  -- 存储过程的其他逻辑
END;

Please note that the above sample code is just a basic template, you will need to modify and supplement it according to your actual requirements.

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