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15
数据库/头歌/MAX() 函数和 MIN() 函数的使用/1. MAX() 函数和 MIN() 函数的使用.sh
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USE Mall
GO
SET NOCOUNT ON
------ return the price of the least expensive item ------
-- ********** Begin ********** --
SELECT prod_name, prod_price
FROM Products
WHERE prod_price = (SELECT MIN(prod_price) FROM Products)
-- ********** End ********** --
GO

16
数据库/头歌/SUM() 函数的使用/1. SUM() 函数的使用.sh
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USE Mall
GO
SET NOCOUNT ON
------ return the amount of all products ------
-- ********** Begin ********** --
SELECT SUM(prod_price * quantity) as amount
FROM Products
-- ********** End ********** --
GO

19
数据库/头歌/内连接查询/内连接查询.sh
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@ -1,19 +0,0 @@
USE Mall
GO
SET NOCOUNT ON
--********** Begin **********--
SELECT
p.prod_id,
p.prod_name,
p.prod_price,
p.vend_id,
v.vend_name,
v.vend_phone
FROM Products p
INNER JOIN Vendors v
ON p.vend_id = v.vend_id
--********** End **********--
GO

24
数据库/头歌/外连接查询/外连接查询.sh
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@ -1,24 +0,0 @@
USE Mall
GO
SET NOCOUNT ON
--********** 左连接 **********--
--********** Begin **********--
SELECT p.prod_id, p.prod_name, p.prod_price, p.vend_id,
v.vend_id, v.vend_name, v.vend_phone
FROM Products p LEFT JOIN Vendors v
ON p.vend_id = v.vend_id;
--********** End **********--
--********** 右连接 **********--
--********** Begin **********--
SELECT p.prod_id, p.prod_name, p.prod_price, p.vend_id,
v.vend_id, v.vend_name, v.vend_phone
FROM Products p RIGHT JOIN Vendors v
ON p.vend_id = v.vend_id;
--********** End **********--
GO

15
数据库/头歌/带 WHERE 子句的多表查询/1. 带 WHERE 子句的多表查询.sh
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@ -1,15 +0,0 @@
USE Mall
GO
SET NOCOUNT ON
--********** Begin **********--
SELECT p.prod_id, p.prod_name, p.prod_price, p.vend_id,
v.vend_id, v.vend_name, v.vend_phone
FROM Products p, Vendors v
WHERE p.vend_id = v.vend_id
--********** End **********--
GO

18
数据库/头歌/视图的创建和使用/1. 数据库视图的创建和使用.sh
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USE studentdb
go
SET NOCOUNT ON
go
--********** create score_view_cdept **********--
--********** Begin **********--
CREATE VIEW score_view_cdept AS
SELECT s.sno, s.name, c.cname, sc.grade
FROM Student s
JOIN Score sc ON s.sno = sc.sno
JOIN Course c ON sc.cno = c.cno;
--********** End **********--
go