From 4dd55e886ee5384f3cdef21f78906bfef939635f Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?=E6=B1=9F=E8=B4=A4=E6=A6=95?= <1697362358@qq.com> Date: Wed, 23 Oct 2024 22:43:23 +0800 Subject: [PATCH] 1023 --- .../\347\273\203\344\271\240.md" | 128 ++++++++++++++++++ 1 file changed, 128 insertions(+) create mode 100644 "\346\261\237\350\264\244\346\246\225/175\347\273\203\344\271\240/\347\273\203\344\271\240.md" diff --git "a/\346\261\237\350\264\244\346\246\225/175\347\273\203\344\271\240/\347\273\203\344\271\240.md" "b/\346\261\237\350\264\244\346\246\225/175\347\273\203\344\271\240/\347\273\203\344\271\240.md" new file mode 100644 index 0000000..c29f333 --- /dev/null +++ "b/\346\261\237\350\264\244\346\246\225/175\347\273\203\344\271\240/\347\273\203\344\271\240.md" @@ -0,0 +1,128 @@ +# 二、综合题 +-- 1. 描述（10分） +-- 针对如下表Author结构创建索引，写出创建索引的SQL语句： +CREATE TABLE Author +( + Id int PRIMARY KEY , + FirstName varchar(45) NOT NULL, + LastName varchar(45) NOT NULL, + UpdatedTime datetime NOT NULL + ) +-- 对FirstName创建唯一索引uniq_idx_firstname，对LastName创建普通索引idx_lastname +# 答题区： +-- ----------------------------------------------------------------- + + CREATE UNIQUE index uniq_idx_firstname on Author ( FirstName) + CREATE index idx_lastname on Author (LastName) + +-- ----------------------------------------------------------------- + +-- 2. 描述（15分） +-- 构造一个触发器trg_AuditLog，在向Employees表中插入一条数据的时候，触发插入相关的数据到AuditLog中。 +-- -- 职员表 +CREATE TABLE Employees +( + Id INT PRIMARY KEY auto_increment, + Name varchar(80) NOT NULL, + Age INT NOT NULL, + Address varchar(50), + SALARY decimal(18,2) +); +-- -- 审计日志表 +CREATE TABLE AuditLog +( + Id int primary key auto_increment, + NAME TEXT NOT NULL, + Salary decimal(18,2) +); +-- 写好触发器后，往Employees插入一条数据: +INSERT INTO Employees (NAME,AGE,ADDRESS,SALARY)VALUES ('Paul', 32, 'California', 20000.00 ); +-- 然后从AuditLog里面使用查询语句: +select NAME,Salary from AuditLog; +-- 会输出： +mysql> select NAME,Salary from AuditLog; ++------+----------+ +| NAME | Salary | ++------+----------+ +| Paul | 20000.00 | ++------+----------+ + +# 答题区： +-- ----------------------------------------------------------------- + +CREATE TRIGGER trg_AuditLog +AFTER INSERT on Employees +for each row +INSERT INTO AuditLog (NAME,Salary) VALUES (new.NAME,new.SALARY); + + +-- ----------------------------------------------------------------- + +-- 3. 描述（10分） +-- 针对Author表创建视图vw_Author，只包含FirstName以及LastName两列，并对这两列重新命名，FirstName为v_FirstName，LastName修改为v_LastName： +-- 先往Author表插入2条测试数据: +insert into Author values (1,'PENELOPE', 'GUINESS', '2006-02-15 12:34:33'), (2,'NICK', 'WAHLBERG', '2006-02-15 12:34:33'); +-- 查询视图：select * from vw_Author; +-- 输出： ++-------------+------------+ +| v_FirstName | v_LastName | ++-------------+------------+ +| PENELOPE | GUINESS | +| NICK | WAHLBERG | ++-------------+------------+ +# 答题区： +-- ----------------------------------------------------------------- + +CREATE view vw_Author as SELECT FirstName as v_FirstName,LastName as v_LastName FROM Author; + +SELECT * FROM vw_Author + +-- ----------------------------------------------------------------- + +-- 4. 描述（10分） +-- 使用以下数据，完成相关操作 +-- -- 新建表 +CREATE TABLE user +( + Id int primary key auto_increment, + UserCode varchar(80), + Birthday date NOT NULL, + FirstName varchar(14) NOT NULL, + LastName varchar(16) NOT NULL, + Gender char(1) NOT NULL, + HireDate date NOT NULL +); +# 插入一些数据： +INSERT INTO `user` (UserCode,Birthday,FirstName,LastName,Gender,HireDate) VALUES('10001','1953-09-02','Georgi','Facello','M','1986-06-26'); +INSERT INTO `user` (UserCode,Birthday,FirstName,LastName,Gender,HireDate) VALUES('10002','1964-06-02','Bezalel','Simmel','F','1985-11-21'); +INSERT INTO `user` (UserCode,Birthday,FirstName,LastName,Gender,HireDate) VALUES('10003','1959-12-03','Parto','Bamford','M','1986-08-28'); +INSERT INTO `user` (UserCode,Birthday,FirstName,LastName,Gender,HireDate) VALUES('10004','1954-05-01','Chirstian','Koblick','M','1986-12-01'); +INSERT INTO `user` (UserCode,Birthday,FirstName,LastName,Gender,HireDate) VALUES('10005','1955-01-21','Kyoichi','Maliniak','M','1989-09-12'); +INSERT INTO `user` (UserCode,Birthday,FirstName,LastName,Gender,HireDate) VALUES('10006','1953-04-20','Anneke','Preusig','F','1989-06-02'); +INSERT INTO `user` (UserCode,Birthday,FirstName,LastName,Gender,HireDate) VALUES('10007','1957-05-23','Tzvetan','Zielinski','F','1989-02-10'); +INSERT INTO `user` (UserCode,Birthday,FirstName,LastName,Gender,HireDate) VALUES('10008','1958-02-19','Saniya','Kalloufi','M','1994-09-15'); +INSERT INTO `user` (UserCode,Birthday,FirstName,LastName,Gender,HireDate) VALUES('10009','1952-04-19','Sumant','Peac','F','1985-02-18'); +INSERT INTO `user` (UserCode,Birthday,FirstName,LastName,Gender,HireDate) VALUES('10010','1963-06-01','Duangkaew','Piveteau','F','1989-08-24'); +INSERT INTO `user` (UserCode,Birthday,FirstName,LastName,Gender,HireDate) VALUES('10011','1953-11-07','Mary','Sluis','F','1990-01-22'); +-- +-- 查询user表，实现以下显示效果： ++----------+------------+-----------+-----------+--------+------------+ +| UserCode | Birthday | FirstName | LastName | Gender | HireDate | ++----------+------------+-----------+-----------+--------+------------+ +| 10001 | 1953-09-02 | Georgi | Facello | 女 | 1986-06-26 | +| 10002 | 1964-06-02 | Bezalel | Simmel | 男 | 1985-11-21 | +| 10003 | 1959-12-03 | Parto | Bamford | 女 | 1986-08-28 | +| 10004 | 1954-05-01 | Chirstian | Koblick | 女 | 1986-12-01 | +| 10005 | 1955-01-21 | Kyoichi | Maliniak | 女 | 1989-09-12 | +| 10006 | 1953-04-20 | Anneke | Preusig | 男 | 1989-06-02 | +| 10007 | 1957-05-23 | Tzvetan | Zielinski | 男 | 1989-02-10 | +| 10008 | 1958-02-19 | Saniya | Kalloufi | 女 | 1994-09-15 | +| 10009 | 1952-04-19 | Sumant | Peac | 男 | 1985-02-18 | +| 10010 | 1963-06-01 | Duangkaew | Piveteau | 男 | 1989-08-24 | +| 10011 | 1953-11-07 | Mary | Sluis | 男 | 1990-01-22 | ++----------+------------+-----------+-----------+--------+------------+ + +# 答题区： +-- ----------------------------------------------------------------- +SELECT UserCode,Birthday,FirstName,LastName,IF(Gender='M','女','男'),HireDate FROM user +-- ----------------------------------------------------------------- \ No newline at end of file -- Gitee