我想为此多个查询创建单个查询答案

【问题标题】：I want to create single query for this multiple queries我想为此多个查询创建单个查询
【发布时间】：2018-02-01 19:46:27
【问题描述】：

Update TransactionsMovs SET SubNumId='5253420' where SubNumId='3014362178619A000000033F' and CustNumKey='0024180002'
Update TransactionsMovs SET SubNumID='5253416' where SubNumId='301402662C2DC5800000017C' and CustNumKey='0024180003' 
Update TransactionsMovs SET SubNumID='5253419' where SubNumId='301402662C42F480000036AF' and CustNumKey='0024180004'
Update TransactionsMovs SET SubNumID='5253418' where SubNumId='30143639F809E880000003AA' and ItemNumKey='055270490-32-30'
Update TransactionsMovs SET SubNumID='5253417' where SubNumId='30140BA4EC4833C00000008C' and CustNumKey='0022870002'

【问题讨论】：

您正在更新具有不同字段的不同键，为什么要将其合并到 1 个查询中？这样做有什么好处？
你不能.....
尝试使用案例...
Is it possible to perform multiple updates with a single UPDATE SQL statement?的可能重复
请详细说明您的要求。

标签： sql

【解决方案1】：

您想减少数据库往返吗？如果是，您可以用 begin end 包围查询；

BEGIN
    Update TransactionsMovs SET SubNumId='5253420' where SubNumId='3014362178619A000000033F' and CustNumKey='0024180002';
    Update TransactionsMovs SET SubNumID='5253416' where SubNumId='301402662C2DC5800000017C' and CustNumKey='0024180003';
    Update TransactionsMovs SET SubNumID='5253419' where SubNumId='301402662C42F480000036AF' and CustNumKey='0024180004';
    Update TransactionsMovs SET SubNumID='5253418' where SubNumId='30143639F809E880000003AA' and ItemNumKey='055270490-32-30';
    Update TransactionsMovs SET SubNumID='5253417' where SubNumId='30140BA4EC4833C00000008C' and CustNumKey='0022870002';
END;

【讨论】：

【解决方案2】：

您正在尝试实现这样的目标，将所有条件与一个 UPDATE 语句结合起来。

Update TransactionsMovs
SET    SubNumId = CASE WHEN SubNumId='3014362178619A000000033F' AND CustNumKey='0024180002' THEN '5253420' 
                       WHEN SubNumId='301402662C2DC5800000017C' AND CustNumKey='0024180003' THEN '5253416' 
                       WHEN SubNumId='301402662C42F480000036AF' AND CustNumKey='0024180004' THEN '5253419' 
                       WHEN SubNumId='30143639F809E880000003AA' AND ItemNumKey='055270490-32-30' THEN '5253418'
                       WHEN SubNumId='30140BA4EC4833C00000008C' AND CustNumKey='0022870002' THEN '5253417'         
          END

【讨论】：