Oracle坑之-空字符串与NULL

Oracle坑之-空字符串与NULL 空字符串与NULL 首先有以下代码html SELECT * FROM Pdc_DataDomain DD INNER JOIN Pdc_DD_Table DDT ON DD.DataDomainID = DDT.DataDomainID AND DD.ApplicationDBID = '3e7c6764d73f4c7786c99e5b72eb6912' A

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