Initial commit

Experiment1.3/Exp1-3.sql

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