sqlyog表格的建立

2024-10-12 03:49:25

1、CREATE TABLE stu(创建表坼黉赞楞格sid CHAR(6),字段字段类型sname VARCHAR(50),age INT,genderVARCHAR(50));INSERT I绿覆冗猩NTO stu VALUES('s_1001','liuYi',35,'male');插入数据命令，对应的字段名INSERT INTO stu VALUES('s_1002','chenEr',15,'female');INSERT INTO stu VALUES('s_1003','zhangSan',95,'male');SELECT*FROM stu;INSERT INTO stu VALUES('s_1004','liSi',65,'female');INSERT INTO stu VALUES('s_1005','wangWu',55,'male');INSERT INTO stu VALUES ('s_1006','zhaoLiu',75,'female');INSERT INTO stu VALUES ('s_1007','sunQi',25,'male');INSERT INTO stu VALUES ('s_1008','zhaoBa',45,'female');INSERT INTO stu VALUES('s_1009','wuJiu',85,'male');INSERT INTO stu VALUES ('s_1010','zhengShi',5,'female');INSERT INTO stu VALUES('s_1011','xxx',NULL,NULL);

2、SELECT*FROM stu;显示stu 表格CREATE TABLE emp(empno INT,enameVARCHAR(50),jobVARCHAR(50),mgrINT,hiredateDATE,salDECIMAL(7,2),comm DECIMAL(7,2),deptnoINT);

3、SHOW TABLES;INSERT INTO emp VALUES(7369,'SMITH&#泌驾台佐39;,'CLERK',7902,'1980-12-17',800,NULL,20);INSERT INTO emp VALUES(7499,'ALLEN','SALESMAN',7698,'1981-02-20',1600,300,30);INSERT INTO emp VALUES(7521,'WARD','SALESMAN',7698,'1981-02-22',1250,500,30);INSERT INTO emp VALUES(7566,'JONES','MANAGER',7839,'1981-04-02',2975,NULL,20);INSERT INTO emp VALUES(7654,'MARTIN','SALESMAN',7698,'1981-09-28',1250,1400,30);

4、INSERT INTO emp VALUES(7698,'BLAKE','MANAGER',7839,'1981-05-01',2850,NULL,30);INSERT INTO emp VALUES(7782,'CLARK','MANAGER',7839,'1981-06-09',2450,NULL,10);INSERT INTO emp VALUES(7788,'SCOTT','ANALYST',7566,'1987-04-19',3000,NULL,20);INSERT INTO emp VALUES(7839,'KING','PRESIDENT',NULL,'1981-11-17',5000,NULL,10);INSERT INTO emp VALUES(7844,'TURNER','SALESMAN',7698,'1981-09-08',1500,0,30);

5、INSERT INTO emp VALUES(7876,'ADAMS','CLERK',7788,'1987-05-23',1100,NULL,20);INSERT INTO emp VALUES(7900,'JAMES','CLERK',7698,'1981-12-03',950,NULL,30);INSERT INTO emp VALUES(7902,'FORD','ANALYST',7566,'1981-12-03',3000,NULL,20);INSERT INTO emp VALUES(7934,'MILLER','CLERK',7782,'1982-01-23',1300,NULL,10);CREATE TABLE dept(deptnoINT,dnameVARCHAR(14),locVARCHAR(13));

6、INSERT INTO dept VALUES(10, 'ACCOUNTING', 'NEW YORK');INSERT INTO dept VALUES(20, 'RESEARCH', 'DALLAS');INSERT INTO dept VALUES(30, 'SALES', 'CHICAGO');INSERT INTO dept VALUES(40, 'OPERATIONS', 'BOSTON');SELECT*FROM stu;SELECT*FROM emp;SELECT*FROM dept;SELECT sname,age FROM stu;只显示出姓名和和年龄SELECT *FROM stu WHERE sid='s_1001' OR sname='liSi';显示字段sid为s_1001的或字段sname为李四的数据