1.选择数据库 USE
刚链接到MySQL时，没有数据库打开供你使用，而我们需要选择一个数据库，才能进行以下的操作。
方法：USE语句
USE Mdatabase;
如此，才能打开数据库，读取其中的数据
2.显示信息 SHOW
MySQL从内部表中提取信息
SHOW database;
返回可用数据库的一个列表
SHOW tables;
返回数据库内的表的列表
SHOW columns from table;
显示表列
3.创建表 CREATE TABLE
基本语法：
//by LMY
CREATE DATABASE 数据库名; /*创建数据库*/
USE 数据库名; /*连接数据库*/
CREATE TABLE 表名1
(
列名1 数据类型 要求,
列名2 数据类型 要求,
列名3 数据类型 要求,
.......
PRIMARY KEY (主键) /*注意，此处没有逗号*/
);
以我的数据库作业作为栗子：
（环境，MySQL workbench）
要求：
创建一个名为”my_own_movie_database“的数据库，之后，建如下几个表，之后把相应输入插入
首先，打开workbench，添加一个新的SQL文件
之后，在新的文件中写入sql语句
写入相应sql语句，写完，你会在左侧发现，有了一个新的数据库，点进去，还可以看到你建的表
完整代码如下：
drop database if exists `my_own_movie_database`;
create database `my_own_movie_database`;
USE `my_own_movie_database`;
CREATE TABLE `movieexec` (
`name` char(30) DEFAULT NULL,
`address` varchar(100) DEFAULT NULL,
`cert` int(11) NOT NULL DEFAULT "0
",
`netWorth` int(11) DEFAULT NULL,
PRIMARY KEY (`cert`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
#
# Data for table "movieexec"
#
INSERT INTO `movieexec` VALUES ("Calvin Coolidge","Fast Lane",123,20000000),("Merv Griffin","Riot Rd.",199,112000000),("Stephen Spielberg","123 ET road",222,100000000),("Ted Turner","Turner Av.",333,125000000),("George Lucas","Oak Rd.",555,200000000),("Jane Fonda","Turner Av.",567,200000000);
#
# Source for table "movies"
#
CREATE TABLE `studio` (
`name` char(30) NOT NULL DEFAULT "",
`address` varchar(100) DEFAULT NULL,
`presC` int(11) DEFAULT NULL,
PRIMARY KEY (`name`)
) ;
#
# Data for table "studio"
#
INSERT INTO `studio` VALUES ("MGM","MGM Boulevard",123),("Fox","Fox Boulevard",199),("Disney","Disney Boulevard",222),("USA Entertainm","USA Entertainm Boulevard",333),("Paramount","Paramount Boulevard",555);
CREATE TABLE `movies` (
`title` char(100) NOT NULL DEFAULT "",
`year` int(11) NOT NULL DEFAULT "0",
`length` int(11) DEFAULT NULL,
`movieType` char(10) DEFAULT NULL,
`studioName` char(30) ,
`producerC` int(11) DEFAULT NULL,
PRIMARY KEY (`title`,`year`),
foreign key(studioName) references studio(name) on delete cascade
) ;
#
# Data for table "movies"
#
INSERT INTO `movies` VALUES ("Empire Strikes Back",1980,111,"drama","Fox",555),("Gone With the Wind",1938,null,"drama","MGM",123),("Logan"s run",1977,120,"drama","MGM",888),("Pretty Woman",1990,119,"drama","Disney",999),("Star Trek",1979,132,"sciFic","Paramount",444),("Star Trek: Nemesis",2002,116,"sciFic","Paramount",321),("Star Wars",1977,124,"sciFic","Fox",555),("Terms of Endearment",1983,132,"drama","MGM",123),("The Man Who Wasn"t There",2001,116,"comedy","USA Entertainm",777),("The Usual Suspects",1995,106,"drama","MGM",999);
#
# Source for table "moviestar"
#
CREATE TABLE `moviestar` (
`name` char(30) NOT NULL DEFAULT "",
`address` varchar(255) DEFAULT NULL,
`gender` char(1) DEFAULT NULL,
`birthdate` date DEFAULT NULL,
PRIMARY KEY (`name`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
#
# Data for table "moviestar"
#
INSERT INTO `moviestar` VALUES ("Alec Baldwin","Baldwin Av.","M","1977-06-07"),("Debra Winger","A way","F","1978-05-06"),("Harrison Ford","Prefect Rd.","M","1955-05-05"),("Jack Nicholson""s","X path","M","1949-05-05"),("Jane Fonda","Turner Av.","F","1977-07-07");
#
# Source for table "starsin"
#
CREATE TABLE `starsin` (
`movieTitle` char(100) NOT NULL DEFAULT "",
`movieYear` int(11) NOT NULL DEFAULT "0",
`starName` char(30) NOT NULL DEFAULT "",
PRIMARY KEY (`movieTitle`,`movieYear`,`starName`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
#
# Data for table "starsin"
#
INSERT INTO `starsin` VALUES ("Empire Strikes Back",1980,"Harrison Ford"),("Star Wars",1977,"Carrie Fisher"),("Star Wars",1977,"Harrison Ford"),("Star Wars",1977,"Mark Hamill"),("Terms of Endearment",1983,"Debra Winger"),("Terms of Endearment",1983,"Jack Nicholson"),("The Usual Suspects",1995,"Kevin Spacey");
#
# Source for table "studio"
#
4.插入数据 INSERT
基本写法：
INSERT INTO 表名1 VALUES (数据1，数据2，数据3.....),(数据1，数据2......)....；
最后，运行，快捷键：Ctrl +Shift+Enter
（这个地方我愣是到这门课都快学完了，才知道怎么运行…哭死了，前半学期装不上软件，后半学期天天迷为什么建不了表…）
建完表之后，可以看到，表中的内容
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原文链接：https://blog.csdn.net/qq_52109814/article/details/121771413
