Question

我正在尝试在问题中写的内容，可能是一个愚蠢的问题，但我找不到解决方案，基本上这就是我想做的事情：

if(a.operator_id!=0){
    UPDATE ".$SupportTicketsTable." a ,".$SupportUserTable." b 
    SET a.title=? , a.priority=?, a.ticket_status=?, 
    b.solved_tickets= CASE 
        WHEN a.ticket_status!='0' THEN (b.solved_tickets+1) 
        ELSE b.solved_tickets END , 
    b.assigned_tickets= CASE  
        WHEN a.ticket_status!='0' THEN (b.assigned_tickets-1) 
        ELSE b.assigned_tickets END ,a.ticket_status='0' 
    WHERE a.enc_id=? AND b.id=a.operator_id
}
else{
    UPDATE ".$SupportTicketsTable." a ,".$SupportUserTable." b 
    SET a.title=? , a.priority=?, a.ticket_status=?
        ELSE b.assigned_tickets END ,a.ticket_status='0' 
    WHERE a.enc_id=?
}

当a.operator_id=0没有符合条件的b.id值时有没有办法只在一个查询中执行此操作？提前致谢

Answer 1

我认为你的分支ELSE错了：

...
else{
UPDATE ".$SupportTicketsTable." a ,".$SupportUserTable." b 
SET a.title=? , a.priority=?, a.ticket_status=?
    ELSE b.assigned_tickets END ,a.ticket_status='0' 
WHERE a.enc_id=?
}

您可以使用dynamicSQL创建一个或两个srored过程，并将表名作为参数放入其中。例如：

DELIMITER $$
DROP PROCEDURE IF EXISTS my_proc $$
CREATE PROCEDURE my_proc (IN SupportTicketsTable VARCHAR(20), IN SupportUserTable VARCHAR(20))
BEGIN
SET @SQLS = CONCAT('UPDATE ',SupportTicketsTable, 'a ', SupportUserTable,' b 
    SET a.title=? , a.priority=?, a.ticket_status=?, 
    b.solved_tickets= CASE 
       WHEN a.ticket_status!='0' THEN (b.solved_tickets+1) 
       ELSE b.solved_tickets END , 
    b.assigned_tickets= CASE  
       WHEN a.ticket_status!='0' THEN (b.assigned_tickets-1) 
       ELSE b.assigned_tickets END ,
    a.ticket_status='0' 
    WHERE a.enc_id=? AND b.id=a.operator_id';

PREPARE STMT FROM @SQLS;
EXECUTE STMT;
DEALLOCATE PREPARE STMT;

END$$

根据列值更新不同表中的不同列

1 个答案: