124 lines
3.7 KiB
Transact-SQL
124 lines
3.7 KiB
Transact-SQL
Use TPCH;
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Go
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-- IN嵌套查询
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-- 查询订购了“海大”制造的“船舶模拟驾驶舱”的顾客。
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SELECT custkey, name
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FROM Sales.Customer
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WHERE custkey IN(
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SELECT O.custkey
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FROM Sales.Orders AS O, Sales.Lineitem L, Sales.Partsupp PS, Sales.Part P
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WHERE O.orderkey = L.orderkey
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AND L.partkey = PS.partkey
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AND L.suppkey = PS.suppkey
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AND PS.partkey = P.partkey
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AND P.mfgr = N'海大' AND P.name = N'船舶模拟驾驶舱'
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);
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Go
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-- 单层EXISTS嵌套查询
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-- 查询没有购买过“海大”制造的“船舶模拟驾驶舱”的顾客。
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SELECT custkey, name
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FROM Sales.Customer C
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WHERE NOT EXISTS(
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SELECT O.custkey
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FROM Sales.Orders O, Sales.Lineitem L, Sales.Partsupp PS, Sales.Part P
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WHERE C.custkey = O.custkey
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AND O.orderkey = L.orderkey
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AND L.partkey = PS.partkey
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AND L.suppkey = PS.suppkey
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AND PS.partkey = P.partkey
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AND P.mfgr = N'海大' AND P.name = N'船舶模拟驾驶舱'
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);
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Go
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-- 双层EXISTS嵌套查询
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-- 查询至少购买过顾客“张三”购买过的全部零件的顾客姓名。
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SELECT CA.name
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FROM Sales.Customer CA
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WHERE NOT EXISTS(
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SELECT *
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FROM Sales.Customer CB, Sales.Orders OB, Sales.Lineitem LB
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WHERE CB.custkey = OB.custkey
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AND OB.orderkey = LB.orderkey
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AND CB.name = N'张三'
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AND NOT EXISTS(
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SELECT *
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FROM Sales.Orders OC, Sales.Lineitem LC
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WHERE CA.custkey = OC.custkey
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AND OC.orderkey = LC.orderkey
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AND LB.suppkey = LC.suppkey
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AND LB.partkey = LC.partkey
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)
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);
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Go
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-- FROM子句中的嵌套查询
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-- 查询订单平均金额超过1万元的顾客中的中国籍顾客信息。
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SELECT C.*
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FROM Sales.Customer C,(
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SELECT custkey
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FROM Sales.Orders
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GROUP BY custkey
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HAVING AVG(totalprice) > 10000
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) B, Sales.Nation N
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WHERE C.custkey = B.custkey
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AND C.nationkey = N.nationkey
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AND N.name = N'中国';
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Go
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-- 集合查询（交）
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-- 查询顾客“张三”和“李四”都订购过的全部零件的信息。
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SELECT P.*
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FROM Sales.Customer C, Sales.Orders O, Sales.Lineitem L, Sales.Partsupp PS, Sales.Part P
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WHERE C.custkey = O.custkey
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AND O.orderkey = L.orderkey
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AND L.suppkey = PS.suppkey
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AND L.partkey = PS.partkey
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AND PS.partkey = P.partkey
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AND C.name = N'张三'
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INTERSECT
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SELECT P.*
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FROM Sales.Customer C, Sales.Orders O, Sales.Lineitem L, Sales.Partsupp PS, Sales.Part P
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WHERE C.custkey = O.custkey
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AND O.orderkey = L.orderkey
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AND L.suppkey = PS.suppkey
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AND L.partkey = PS.partkey
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AND PS.partkey = P.partkey
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AND C.name = N'李四';
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Go
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-- 集合查询（并）
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-- 查询顾客“张三”和“李四”订购的全部零件的信息。
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SELECT P.*
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FROM Sales.Customer C, Sales.Orders O, Sales.Lineitem L, Sales.Partsupp PS, Sales.Part P
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WHERE C.custkey = O.custkey
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AND O.orderkey = L.orderkey
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AND L.suppkey = PS.suppkey
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AND L.partkey = PS.partkey
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AND PS.partkey = P.partkey
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AND C.name = N'张三'
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UNION
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SELECT P.*
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FROM Sales.Customer C, Sales.Orders O, Sales.Lineitem L, Sales.Partsupp PS, Sales.Part P
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WHERE C.custkey = O.custkey
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AND O.orderkey = L.orderkey
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AND L.suppkey = PS.suppkey
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AND L.partkey = PS.partkey
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AND PS.partkey = P.partkey
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AND C.name = N'李四';
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Go
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-- 集合查询（差）
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-- 顾客“张三”订购过而“李四”没订购过的零件的信息。
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SELECT P.*
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FROM Sales.Customer C, Sales.Orders O, Sales.Lineitem L, Sales.Partsupp PS, Sales.Part P
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WHERE C.custkey = O.custkey
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AND O.orderkey = L.orderkey
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AND L.suppkey = PS.suppkey
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AND L.partkey = PS.partkey
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AND PS.partkey = P.partkey
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AND C.name = N'张三'
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EXCEPT
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SELECT P.*
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FROM Sales.Customer C, Sales.Orders O, Sales.Lineitem L, Sales.Partsupp PS, Sales.Part P
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WHERE C.custkey = O.custkey
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AND O.orderkey = L.orderkey
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AND L.suppkey = PS.suppkey
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AND L.partkey = PS.partkey
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AND PS.partkey = P.partkey
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AND C.name = N'李四';
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Go |