关于sql：如何使用join和where子句从表中删除？

How can I delete from a table using the join and where clause?

本问题已经有最佳答案，请猛点这里访问。

下面是迄今为止我的代码，选择查询是我要从事件表中删除的查询。

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DECLARE @maxsnapevent TABLE (sita VARCHAR(10), snap DATE)
INSERT INTO @maxsnapevent
SELECT sita, MAX(snapshot_date) FROM ukrmc.dbo.strategy GROUP BY sita
--select * from @maxsnapevent

--need to delete everything that the following code gives
SELECT events.sita, events.date, events.event FROM ukrmc.dbo.events events
JOIN @maxsnapevent MAX ON MAX.sita = events.sita
WHERE DATE >= MAX.snap AND events.sita != 'lcypd' AND events.sita != 'lonza'

策略表中的示例数据：

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DATE sita Event Snapshot_date
2018-01-01 London Bank Holiday 2017-12-31
2018-01-02 London 2017-12-31
2018-01-03 London 2017-12-31
2018-01-04 London Concert 2017-12-31
2018-01-02 London 2018-01-01
2018-01-03 London 2018-01-01
2018-01-04 London Concert 2018-01-01
2018-01-01 Bham Bank Holiday 2017-12-31
2018-01-02 Bham 2017-12-31
2018-01-03 Bham 2017-12-31
2018-01-04 Bham 2017-12-31
2018-01-02 Bham 2018-01-01
2018-01-03 Bham Charity 2018-01-01
2018-01-04 Bham 2018-01-01

号

事件表中的示例数据：

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DATE sita Event
2018-01-01 London Bank Holiday
2018-01-02 London
2018-01-03 London
2018-01-04 London Concert
2018-01-01 Bham Bank Holiday
2018-01-02 Bham
2018-01-03 Bham
2018-01-04 Bham Concert

如您所见，每个快照都有几个具有多个日期的sita。