sql - 如何在一个查询中选择和更新？

Question

我需要返回一行：

.NET[tableReturn] = select top(1) * from [table] where x = 0 order by desc

但同时我需要更新它：

update [table] set x = 1 where [id] = .NET[tableReturn].[id]

并且需要这一行的所有数据

可以在同一个查询中吗？

Answer 1

解决这个！

DECLARE @id int;
SET @id = (select top(1) id from [table] where [x] = 0 order by id desc);

select * from [table] where id = @id;
update [table] set [x] = 20 where id = @id;

:D

Answer 2

尝试这个

with cte as (select top(1) * from [table] where x=0 order by 1 desc)
update [table] set x=1 from cte join [table] c on c.id =cte.id;

Answer 3

使用存储过程。在存储过程中，您可以根据需要执行任意数量的查询。
没有它，您将不得不独立调用多个查询。

希望这可以帮助。

Answer 4

尝试以下查询以使用单个查询更新列。

update [table] set x = 1 where x = (select cte.x from (select top(1) * from [table] where x = 0 order by x desc) cte)

注意：-但更新的列不应该是标识列