create table常用命令

CREATE TABLE students(  
　　stuID INTEGER     NOT NULL ,  
　　stuname char(30)     not null,  　
　　sex     int     NOT NULL  
);  
CREATE TABLE students(  
　　stuID INTEGER     NOT NULL ,  
　　stuname char(30)     not null,  
　　sex     int     NOT NULL,  
　　PRIMARY KEY (stuID)  
);  
CREATE TABLE students(  
　　stuID INTEGER     NOT NULL PRIMARY KEY,  
　　stuname char(30)     not null,  
　　sex     int     NOT NULL  
);  
CREATE TABLE score(  
　　scoreID INTEGER NOT NULL PRIMARY KEY,  
　　stuID     INTEGER NOT NULL,  
　　KEMUID     INTEGER NOT NULL,  
　　score     FLOAT,  
　　FOREIGN KEY SCORE_ID_FK (stuID) REFERENCES students (stuid),  
　　CONSTRAINT CHK_SCORE_ZIP CHECK (SCORE > 0)  
);  
show tables;  
insert into students values(1,'张三',1);  
SELECT * FROM STUDENTS;  
INSERT INTO STUDENTS  
SELECT * FROM STUDENTS;  
DELETE STUDENTS FROM STUDENTS  
WHERE stuID = 1;  
DROP TABLE STUDENTS;  
ALTER TABLE STUDENTS ADD CONSTRAINT PRIMARY KEY (stuID);  
ALTER TABLE STUDENTS ADD PRIMARY KEY (stuID);