Question

我现在正在使用DB2并尝试更新多行，但在查询下方返回SQL0811N，即

标量全选，SELECT INTO语句或VALUES INTO语句的结果不止一行＆＃34;。

我正在寻找可以通过子查询选择的每个值更新多行的查询。

update
    table_004
set
    status = 99,
    bar_date = (
        select
            max(foo_date) as bar_date
        from
            table_001 t1
            inner join
                table_002 t2
            on  t1.keyA = t2.keyA
            inner join
                table_003 t3
            on  t2.keyA = t3.keyA
            inner join
                table_004 t4
            on  t4.keyB = t3.keyB
        where
            t1.id in(1, 2, 3, 4, 5)
        group by
            t1.id,
            t4.keyB
    )

Answer 1

您的表004不需要进入子选择。试试这个：

update table_004 t4
set (t4.status, t4.bar_date) =
(
    select  99,  max(foo_date)
    from table_001 t1
    inner join table_002 t2 on  t1.keyA = t2.keyA
    inner join table_003 t3 on  t2.keyA = t3.keyA
    where t1.id in(1, 2, 3, 4, 5) and t4.keyB = t3.keyB
    group by t1.id
)
where exists
(
    select *
    from table_001 t1
    inner join table_002 t2 on  t1.keyA = t2.keyA
    inner join table_003 t3 on  t2.keyA = t3.keyA
    where t1.id in(1, 2, 3, 4, 5) and t4.keyB = t3.keyB
)

Answer 2

我添加了

比较我要更新的表与子查询中使用的表之间的id的条件
app.block.service.patrick: class: AppBundle\Block\PatrickBlockService arguments: - "Patrick Block" - "@templating"条款where声明

并且查询已经完全按照我的要求执行。万岁！

编辑过的SQL：

update

如何从子查询更新多行？

2 个答案: