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。