根据 Id [重复] 将行从一个表更新到另一个表

【问题标题】：Update rows from one table to another table based on Id [duplicate]根据 Id [重复] 将行从一个表更新到另一个表
【发布时间】：2015-02-01 20:28:03
【问题描述】：

两个表都有一个 client_id 列。当client_id 列相等时，需要将#LocalDashboardtable 中的数据插入T004_Dashboard。我已经尝试过了，但它无助于显示错误“',' 附近的语法不正确。”

    update T004_Dashboard  set T004_Dashboard.[GrossCharge],T004_Dashboard.[NetCharge] 
= (select #LocalDashboardtable.[GrossCharge] , #LocalDashboardtable.[NetCharge] 
from #LocalDashboardtable   where 
#LocalDashboardtable.client_id =T004_Dashboard.client_id and 
#LocalDashboardtable.[month] =T004_Dashboard.[month] 
and #LocalDashboardtable.[year] =T004_Dashboard.[year]  )

请帮帮我

【问题讨论】：

您使用的是 SQL Server 语法，但问题标记为 MySQL。您真正使用的是哪个数据库？
我使用的是 SQL Server2008 R2

标签： sql-server sql-server-2008-r2 sql-update

【解决方案1】：

这是您的查询（看起来很像 SQL Server）：

update T004_Dashboard
    set T004_Dashboard.[GrossCharge],
        T004_Dashboard.[NetCharge] = (select #LocalDashboardtable.[GrossCharge], #LocalDashboardtable.[NetCharge] 
                                      from #LocalDashboardtable
                                      where #LocalDashboardtable.client_id = T004_Dashboard.client_id and 
                                            #LocalDashboardtable.[month] = T004_Dashboard.[month] and
                                            #LocalDashboardtable.[year] = T004_Dashboard.[year]
                                     );

您不能将一对列设置为子查询中的一对列。相反，使用join:

update T004_Dashboard
    set GrossCharge = ld.GrossCharge,
        NetCharge = ld.NetCharge
    from T004_Dashboard d join
         #LocalDashboardtable ld
         on ld.[month] = d.[month] and ld.[year] = d.[year] and
            ld.client_id = d.client_id;

此外，SQL Server 不允许在 update/set 语句中使用限定列名

【讨论】：