CREATE DEFINER = 'root'@'%' TRIGGER `tg_i` AFTER INSERT ON `table1` //建立触发器
FOR EACH ROW
BEGIN //开始
SET @inNodeIds= (SELECT group_concat(CR.nodeId) FROM table2 CR WHERE CR.parkingId = new.parkingId AND CR.directionInOut=0); //查询另一个表并且把查询结果设成一个变量
INSERT INTO cloud (dataType, jsonData)
VALUES ('TABLE1',
CONCAT_WS(
',',CONCAT('{"recordId":"', new.recordId, '"'),
CONCAT_WS(':','"inNodeIds"', IF(@inNodeIds IS NULL OR @inNodeIds='', '""', CONCAT('"', @inNodeIds, '"'))),
CONCAT_WS(':', '"areaName"', IF(new.areaName IS NULL OR new.areaName='', '""}', CONCAT('"', new.areaName, '"}')))
)); //new.xxx是触发器生成的即将插入或修改的信息,old.xxx是触发器所在的表的旧的信息
END; //结束