SQL where条件和join on条件的详解及区别

sql 语句中where条件和join 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！

原文链接：http://www.cnblogs.com/cate/sqlserver/