从别名 table 中删除无效（但 select 有效）

Question

我需要从 table 中删除一些在另一个类似 table 中不可用的行。我可以使用这段代码 select 正确地删除要删除的行

SELECT *
FROM [DB01].[forward].[forward_value] as DB01
WHERE Id_forward like 'test' and
NOT EXISTS (SELECT *
    FROM [DB02].[db_marketdata].[forward].[forward_value] as DB02
    WHERE DB01.Id_Forward = DB02.Id_Forward and
        DB01.Id_Block = DB02.Id_Block and
        DB01.Id_PriceType = DB02.Id_PriceType and
)

当我将 SELECT (*) 更改为 DELETE 时出现错误，因为我无法为第一个 table.

添加别名

Msg 156, Level 15, State 1, Line 2

Incorrect syntax near the keyword 'as'.

如何在不使用别名正确 select 行的情况下删除这些值？

Answer 1

将您的别名放在 DELETE 语法中，如下所示：

delete DB01
FROM [DB01].[forward].[forward_value] as DB01
WHERE Id_forward like 'test' and
NOT EXISTS (SELECT *
    FROM [DB02].[db_marketdata].[forward].[forward_value] as DB02
    WHERE DB01.Id_Forward = DB02.Id_Forward and
        DB01.Id_Block = DB02.Id_Block and
        DB01.Id_PriceType = DB02.Id_PriceType 
)

Answer 2

好的，你可以像这样使用别名

DELETE DB01
FROM [DB01].[forward].[forward_value] AS DB01
WHERE Id_forward LIKE 'test'
    AND NOT EXISTS (
        SELECT *
        FROM [DB02].[db_marketdata].[forward].[forward_value] AS DB02
        WHERE DB01.Id_Forward = DB02.Id_Forward
            AND DB01.Id_Block = DB02.Id_Block
            AND DB01.Id_PriceType = DB02.Id_PriceType
            AND
        )

从别名 table 中删除无效（但 select 有效）

Delete from aliased table doesn't work (but select does)

sql-server

alias