Question

我有两个日期列[START DATE]和[END DATE]，我想只插入日期不在任一列中的记录。这就是我的逻辑：

MERGE TABLE_A                                      AS Target
USING (SELECT DISTINCT * FROM TABLE_B)             AS Source
ON (SELECT Target.[START DATE] + Target.[END DATE] AS Target.[COMPAREDATE] = 
    SELECT Source.[START DATE] + Source.[END DATE] AS Source.[COMPAREDATE]) 
WHEN NOT MATCHED THEN
INSERT ([DATE ADDED], [END DATE], ...)
VALUES (Source.[DATE ADDED], Source.[END DATE], ...);

我也尝试了下面的代码，但它继续插入重复项：

ON (Target.[START DATE] = Source.[START DATE] AND Target.[END DATE] = Source.[END DATE])

感谢您的帮助，谢谢！

Answer 1

此代码已关闭：

ON (Target.[START DATE] = Source.[START DATE] AND Target.[END DATE] = Source.[END DATE])

它说，“如果StartDate和EndDate都匹配，那么行匹配”。

如果你想说“如果StartDates匹配或者EndDates匹配，那么行匹配”，那么你应该这样做：

ON (Target.[START DATE] = Source.[START DATE] OR Target.[END DATE] = Source.[END DATE])

在MERGE sql server的ON搜索条件中组合两列

1 个答案: