我有以下查询在phpMyAdmin中工作
SELECT CONCAT("'",GROUP_CONCAT( fence_id SEPARATOR "','" ),"'") AS fence_ids
FROM asset_fence af
INNER JOIN assets a ON a.vehicle_id = af.vehicle_id
WHERE a.client_id=1
但是同样的查询在存储过程中给出了错误
错误是:
您的SQL语法有错误;检查与MariaDB服务器版本对应的手册,以便在'@fence_ids = SELECT CONCAT(“'”,GROUP_CONCAT(fence_id SEPARATOR“','”),“'”附近使用正确的语法)第8行的AS'
存储过程是
DELIMITER $$
CREATE PROCEDURE `prcDeleteClient`(IN `f_client_id` INT, OUT AROWS INT)
BEGIN
START TRANSACTION;
@fence_ids = SELECT CONCAT("'",GROUP_CONCAT( fence_id SEPARATOR "','" ),"'") AS fence_ids FROM asset_fence af INNER JOIN assets a ON a.vehicle_id = af.vehicle_id WHERE a.client_id=f_client_id
DELETE
asset_fence,
geo_fence
FROM
geo_fence gf INNER JOIN asset_fence af ON gf.fence_id = af.fence_id
WHERE
af.fence_id IN (@fence_ids)
DELETE
client,
assets,
asset_movement
FROM
asset_movement am INNER JOIN assets a ON am.vehicle_id = a.vehicle_id
assets a INNER JOIN client c ON a.client_id = c.client_id
WHERE
c.client_id=f_client_id
SET @AROWS = ROW_COUNT();
SELECT @AROWS as AROWS;
COMMIT;
END $$
DELIMITER ;
更新程序是
DELIMITER $$
CREATE PROCEDURE `prcDeleteClient`(IN `f_client_id` INT, OUT AROWS INT)
BEGIN
START TRANSACTION;
DELETE
af,
gf
FROM
geo_fence gf
INNER JOIN asset_fence af ON gf.fence_id = af.fence_id
INNER JOIN assets a ON a.vehicle_id = af.vehicle_id
WHERE
a.client_id=f_client_id;
DELETE
c,
a,
am
FROM
asset_movement am INNER JOIN assets a ON am.vehicle_id = a.vehicle_id
assets a INNER JOIN clients c ON a.client_id = c.client_id
WHERE
c.client_id=f_client_id;
SELECT ROW_COUNT() AS AROWS;
COMMIT;
END $$
DELIMITER ;
错误是:MULTI DELETE中的未知表'c'
什么是错误,我该如何纠正?
最好的祝福
首先,分配变量的语法是错误的,它需要在变量名之前使用SET
命令。
其次,如果要将SELECT
查询的结果用作值,则必须在其周围加上括号:
SET @fence_ids = (SELECT ...);
三,使用时:
WHERE af.fence_id IN (@fence_ids)
它会将@fence_ids
视为单个ID,而不是ID列表。所以这相当于:
WHERE af.fence_id = @fence_ids
如果要在逗号分隔列表中搜索某些内容,则需要使用FIND_IN_SET
:
WHERE FIND_IN_SET(af.fence_id, @fence_ids)
您也不应该在GROUP_CONCAT()
中的值周围添加引号。
但是你首先不应该使用GROUP_CONCAT
,你应该加入返回所需ID的查询。
DELETE
af,
gf
FROM
geo_fence gf
INNER JOIN asset_fence af ON gf.fence_id = af.fence_id
INNER JOIN assets a ON a.vehicle_id = af.vehicle_id
WHERE a.client_id=f_client_id;
您不需要在两个语句中执行此操作:
SET @AROWS = ROW_COUNT();
SELECT @AROWS as AROWS;
你可以这样做:
SELECT ROW_COUNT() AS AROWS;
您正在设置一个值,因此您不需要列别名...删除theAS fence_ids
SELECT CONCAT("'", GROUP_CONCAT( af.fence_id SEPARATOR "','" ),"'")
FROM asset_fence af
INNER JOIN assets a ON a.vehicle_id = af.vehicle_id
WHERE a.client_id=1
你错过了每次删除的命令终结符
DELETE
asset_fence,
geo_fence
FROM
geo_fence gf INNER JOIN asset_fence af ON gf.fence_id = af.fence_id
WHERE
af.fence_id IN (@fence_ids);
DELETE
client,
assets,
asset_movement
FROM
asset_movement am INNER JOIN assets a ON am.vehicle_id = a.vehicle_id
assets a INNER JOIN client c ON a.client_id = c.client_id
WHERE
c.client_id=f_client_id;