mysql定義游標

-- 1.聲明變量和游標

declare result varchar(3000);

declare flag1 varchar(100);

DECLARE done INT DEFAULT FALSE;

declare cur1 CURSOR FOR SELECT flag from bmlx;

-- 2.變量賦值

DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE;

set result = '';

-- 3.打開游標和循環
open cur1;

read_loop: LOOP

-- 給游標賦值
FETCH cur1 INTO flag1;

-- 跳出循環
IF done THEN

LEAVE read_loop;

END IF;

-- 循環獲取游標數據，進行累加
set result = CONCAT(result, flag1 ,',');

END LOOP;

-- 關閉游標
close cur1;

-- 返回參數
set result = CONCAT(result,'<span style="color:Red">');

RETURN result;

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