Sql 如何删除以2列作为复合主键的多行

例如，我们有一个在Oracle中工作的查询，但是它在SQL Server中不工作。我们如何为SQL server重写它

delete from cpi
where (countryid, year) in (('AD', 2010), ('AF', 2009), ('AG', 1992))

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相比之下，它要笨重得多，但是您可以使用来在

EXISTS

子句中创建元组列表，并以这种方式进行匹配，例如

DELETE FROM cpi
WHERE EXISTS 
      ( SELECT  1
        FROM (VALUES ('AD', 2010), ('AF', 2009), ('AG', 1992)) AS v (countryid, year)
        WHERE v.countryid = cpi.countryid
        AND v.year = cpi.year
      );

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如果真的只有几对，只需：

 delete from cpi
 where (countryid = 'AD' and year = 2010) or (countryid = 'AF' and year = 2009) or (countryid = 'AG' and year = 1992)

或者，如果有更多，可能类似于：

 delete from cpi
 where countryid + '|' + convert(varchar(4),year) in ('AD|2010','AF|2009','AG|1992')

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您可以使用表值构造函数来表示它。在

删除中

：

delete from cpi
    from (values ('AD', 2010), ('AF', 2009), ('AG', 1992) ) v(countryid, year)
    where cpi.countryid = v.countryid and cpi.year = cpi.year;

不需要子查询