DELETE FROM L_DanWei WHERE dw_id = @dw_id这几句话啥意思 特别是后面的dw_id 和 @dw_id啥意思

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DELETE FROM L_DanWei WHERE dw_id = @dw_id这几句话啥意思 特别是后面的dw_id 和 @dw_id啥意思
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DELETE FROM L_DanWei WHERE dw_id = @dw_id这几句话啥意思 特别是后面的dw_id 和 @dw_id啥意思
DELETE FROM L_DanWei WHERE dw_id = @dw_id
这几句话啥意思 特别是后面的dw_id 和 @dw_id啥意思

DELETE FROM L_DanWei WHERE dw_id = @dw_id这几句话啥意思 特别是后面的dw_id 和 @dw_id啥意思
把数据库中“L_DanWei”这张表里的 “dw_id”(单位id)等于“@dw_id”的记录删除
@dw_id是dw_id的变量,它可以为任意的很多值,比如程序提示你输入一个dw_id(单位id)去删除对应的单位记录,你输入的这个单位id就是@dw_id,它根据你的输入可以为不同的许多值.你可以输入5,也可输入50,500他们都是dw_id的变量的值.

dw 应该是dwelling地址,id就是identity身份了吧
这应该是原程序里的语句。
delete form删除表格,danwei应该是单位。

指L_DanWei WHERE dw_id = @dw_id这个不知是什么的东西
被删除了

这应该是一句编程语言。
应该是 从语段dw_id 为@dw_id的L_DanWei中删除。

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