SQL where条件和jion　on条件的详解及区别

SQL where条件和jion　on条件的详解及区别

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。

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