select F_ID,F_Name,F_CLsID From T_Product Where F_ClsID in ( Select F_ID From T_Class Where F_ID='D0C37275-2279-4590-A679-C65A4F28918F'OR F_ParentIdStr like'%D0C37275-2279-4590-A679-C65A4F28918F%')
效果上等效于
Select P.F_ID,P.F_Name,P.F_ClsID From T_Product As P InnerJoin T_Class As C On C.F_ID = P.F_CLSID where C.F_ID='D0C37275-2279-4590-A679-C65A4F28918F'OR C.F_ParentIdStr like'%D0C37275-2279-4590-A679-C65A4F28918F%'
或
Select P.F_ID,P.F_Name,P.F_ClsID From T_Product As P,T_Class As C where P.F_ClSID = C.F_ID And ( C.F_ID='D0C37275-2279-4590-A679-C65A4F28918F'OR C.F_ParentIdStr like'%D0C37275-2279-4590-A679-C65A4F28918F%')
linq to sql的等效写法:
var query = from p in db.T_Products join c in db.T_Classes on p.F_CLSID equals c.F_ID where c.F_ID ==new Guid("D0C37275-2279-4590-A679-C65A4F28918F") || c.F_ParentIDStr.Contains("D0C37275-2279-4590-A679-C65A4F28918F") select new{ p.F_ID, p.F_Name };
或
var query = from p in db.T_Products from c in db.T_Classes where p.F_CLSID == c.F_ID && (c.F_ID ==new Guid("D0C37275-2279-4590-A679-C65A4F28918F") || c.F_ParentIDStr.Contains("D0C37275-2279-4590-A679-C65A4F28918F")) select new{ p.F_ID, p.F_Name };