SQL Server存储过程与触发器课堂练习及答案

1、存储过程与触发器课堂练习及答案1.创建一个存储过程,显示所有价格在15美元以下的书的书名,类型,价格。CREATE PROCEDURE show_titleASSELECT title,type,priceFROM titlesWHERE price < 15GOEXEC show_title2.把价格作为参数,创建一个能显示在某两个指定价格之间的书的书名,类型,价格。CREATE PROCEDURE show_title2price1 money,price2 moneyASSELECT title,type,priceFROM titlesWHERE price between pr

2、ice1 and price2GOshow_title2 12,203.使用OUTPUT参数,创建一个计算圆柱体体积的存储过程。并执行它。CREATE PROCEDURE comp_arear smallint,h smallint,result decimal(10,2 OUTPUTASSET result = PI(*SQUARE(r* hGODECLARE answer decimal(10,2EXECUTE comp_area 2,3, answer OUTPUTSELECT 'The result is: ', answer4.A 建立price_change表,准备

3、用来存放书的价格变化信息,有以下几列:title_id, type,old_price, new_price, change_date, operator。B 建立一个更新触发器,一旦titles表发生更新,立即把相关信息存放到price_change表中。create table price_change(title_id varchar(20,type varchar(20,old_price money,new_price money,change_date datetime,operator varchar(20gocreate trigger tri_priceon titlesfo

4、r updateasinsert into price_changeselect o.title_id,o.type,o.price,n.price,getdate(,user_name(from deleted o JOIN inserted nON o.title_id = n.title_idgoupdate titles set price = price*1.15.修改练习4,使得只有当price列被更新时,才会触发触发器。create trigger tri_priceon titlesfor updateasif update(pricebegininsert into pric

5、e_changeselect o.title_id,o.type,o.price,n.price,getdate(,user_name(from deleted o JOIN inserted nON o.title_id = n.title_idendgo6.创建一个存放书的编号、书名、类型、价格、对应作者的编号、姓名、电话、住址的视图。use pubsgocreate view v_titledetailasselect t.title_id, title, type, price, a.au_id, au_lname, au_fname, phone, addressfrom title

6、s t,titleauthor ta,authors awhere t.title_id = ta.title_id and ta.au_id = a.au_id7.为这个视图创建一个Instead of更新触发器,把对视图的更新放到触发器里面来做。(假设,我们只允许更新这个视图的某几个列:price, phone, addresscreate trigger tri_titledetailon v_titledetailinstead of updateasdeclare price money,phone varchar(20,address varchar(40,title_id var

7、char(20,au_id varchar(20select title_id = title_id, price = price, au_id = au_id, phone = phone ,address = address from insertedupdate titles set price = price where title_id = title_idupdate authors set phone = phone, address = address where au_id = au_idgo8.添加测试数据。更新v_titledetail,把书编号为LI1234的书的价格改为2