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);