外键约束

数据库/头歌/主键约束/主键约束.sh

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+sqlcmd -S localhost -U sa -P '<123123Aa!@>'
+
+CREATE DATABASE MyDb;
+go
+
+USE MyDb;
+go
+
+CREATE TABLE t_user1 (userId INT PRIMARY KEY, name VARCHAR(32), password VARCHAR(32) ,phone VARCHAR(11),email VARCHAR(32));
+go
+
+CREATE TABLE t_user2 (name VARCHAR(32), phone VARCHAR(11), email VARCHAR(32), PRIMARY KEY (name, phone));
+go

数据库/头歌/创建表/创建表.sh

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+sqlcmd -S localhost -U sa -P '<123123Aa!@>'
+
+CREATE DATABASE TestDb;
+go
+
+USE TestDb;
+go
+CREATE TABLE t_emp 
+(
+    id INT,
+    name VARCHAR(32),
+    deptId INT,
+    salary FLOAT
+)
+go

数据库/头歌/外键约束/外键约束.sh

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+sqlcmd -S localhost -U sa -P '<123123Aa!@>'
+
+CREATE DATABASE MyDb;
+go
+
+USE MyDb;
+go
+CREATE TABLE t_class (id INT PRIMARY KEY, name VARCHAR(22));
+go
+CREATE TABLE t_student (id INT PRIMARY KEY, name VARCHAR(22), classId INT ,CONSTRAINT fk_stu_class1  FOREIGN KEY (classId) REFERENCES t_class(id));
+go

数据库/头歌/数据的删除/数据的删除.sh

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+-- ********** create database ********** --
+-- ********** Begin ********** --
+CREATE DATABASE website;
+-- ********** End ********** --
+go
+
+use website
+go
+
+-- ********** create table ********** --
+-- ********** Begin ********** --
+CREATE TABLE shopping (
+    ID int IDENTITY(1,1) NOT NULL,
+    Name varchar(20) NOT NULL,
+    address varchar(30) NOT NULL
+);
+-- ********** End ********** --
+go
+
+SET NOCOUNT ON
+
+insert into shopping (Name, address) values ('eBay', 'www.ebay.com')
+go
+
+SET NOCOUNT ON
+
+-- ********** insert ********** --
+-- ********** Begin ********** --
+insert into shopping (Name, address) values ('amazon', 'www.amazon.com');
+-- ********** End ********** --
+go
+
+SET NOCOUNT ON
+
+-- ********** delete ********** --
+-- ********** Begin ********** --
+DELETE FROM shopping WHERE Name = 'eBay';
+-- ********** End ********** --
+go

数据库/头歌/数据的插入/数据的插入.sh

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+-- ********** create database ********** --
+-- ********** Begin ********** --
+create database school
+
+-- ********** End ********** --
+go
+
+use school
+go
+
+-- ********** create table ********** --
+-- ********** Begin ********** --
+create table teacher(
+    ID int not null,
+    Name varchar(20) not null,
+    sex char(2) not null,
+    Phone varchar(20) null
+)
+
+-- ********** End ********** --
+go
+
+SET NOCOUNT ON
+
+
+-- ********** insert ********** --
+-- ********** Begin ********** --
+insert into teacher(ID, Name, sex, Phone)
+values(1, 'Lucy', 'F', NULL)
+
+-- ********** End ********** --
+go
+

数据库/头歌/通配符[]的使用/通配符[]的使用.sh

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+USE Mall
+Go
+
+SET NOCOUNT ON
+
+---------- retrieving with wildcard [] ----------
+-- ********** Begin ********** --
+
+SELECT prod_id, prod_name, prod_price
+FROM Products
+WHERE prod_name NOT LIKE 'B%';
+
+-- ********** End ********** --
+
+GO
+