MYSQL 可执行的游标示例

以下是MYSQL中可执行的游标示例：

1. 声明游标

DECLARE cursor_name CURSOR FOR SELECT column_name FROM table_name;

2. 打开游标

OPEN cursor_name;

3. 获取游标数据

FETCH cursor_name INTO @variable_name;

4. 处理游标数据

WHILE @@FETCH_STATUS = 0
BEGIN
-- 处理数据
FETCH cursor_name INTO @variable_name;
END

5. 关闭游标

CLOSE cursor_name;

6. 释放游标资源

DEALLOCATE cursor_name;