创建简单的数据表:
CREATE TABLE Student(
StudentNo INT PRIMARY KEY IDENTITY(0,1) NOT NULL,
StudentName VARCHAR(20) NOT NULL,
Age SMALLINT NOT NULL,
Address VARCHAR(200) NULL,
Remark VARCHAR(200) NULL
);
修改数据表:
//添加检查约束
ALTER TABLE Student
ADD CONSTRAINT CK_Student_Age CHECK(Age>=0 AND Age<=120)
//添加字段:
ALTER TABLE Student
ADD Salary MONEY NULL
Insert 插入语句:
INSERT INTO Customer(CustomerName,IdentityNo,Adddress,Email,Remark)
VALUES('徐姑姑','320323198505648958','上海','[email protected]','well done!');
INSERT INTO Customer(CustomerName,IdentityNo,Adddress,Email,Remark)
VALUES('朱闪闪','32032319880864836','苏州','[email protected]','Come On!'),
('张大炮','32032319890845636','杭州','[email protected]','逗比一个')
--将查询出来的结果集插入到数据表中
INSERT INTO Customer(CustomerName,IdentityNo,Adddress,Email,Remark)
SELECT '王艳','3689566238466366','湖南','[email protected]','so nice a person'
Update语句:
UPDATE Customer SET CustomerName='王思聪',IdentityNo='356894198658564836',Adddress='北京',
Email='[email protected]',Remark='豪华富二代' WHERE CustomerNo=3
Delete语句:
DELETE FROM Customer WHERE CustomerNo=7