php - 根据列值更新不同表中的不同列

Question

我正在尝试问题中所写的内容，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:

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时，b.id没有与条件匹配的值 有没有一种方法可以仅在一个查询中执行此操作？提前致谢

Answer 1

1. 我认为你的分支 ELSE 是错误的:

   ...
   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=?
   }
   

2. 您可以创建一两个内部包含动态SQL的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$$