SQL where条件和jion on条件的详解及区别
(编辑:jimmy 日期: 2024/12/23 浏览:3 次 )
sql 语句中where条件和jion on条件的区别
与有很大的差别,请注意!
SELECT TBL_SchemaDetail.MaterialNo, TBL_StockMaterial.SalePrice FROM TBL_StockMaterial RIGHT OUTER JOIN TBL_SchemaDetail ON TBL_StockMaterial.MaterialNo = TBL_SchemaDetail.MaterialNo AND TBL_SchemaDetail.SchemaNo = '7411' AND TBL_StockMaterial.SalePrice = 0
条件全部放到join的on中。
SELECT TBL_SchemaDetail.MaterialNo, TBL_StockMaterial.SalePrice FROM TBL_StockMaterial RIGHT OUTER JOIN TBL_SchemaDetail ON TBL_StockMaterial.MaterialNo = TBL_SchemaDetail.MaterialNo WHERE (TBL_SchemaDetail.SchemaNo = '7411') AND (TBL_StockMaterial.SalePrice = 0)
连接和条件分开。
感谢阅读,希望能帮助到大家,谢谢大家对本站的支持!
下一篇:SQLServer2005创建定时作业任务