1. PostgreSQL版bjpowernode.sql数据
注意:直接使用MySQL版数据会报错,主要是数据类型略有不同,如int4,float4
drop table if exists dept;
drop table if exists salgrade;
drop table if exists emp;
create table dept(
deptno int4 primary key,
dname varchar(14),
loc varchar(13)
);
create table salgrade(
grade int2,
losal int2,
hisal int2
);
create table emp(
empno int2 primary key,
ename varchar(10),
job varchar(9),
mgr int2,
hiredate date,
sal float4,
comm float4,
deptno int4
);
insert into dept(deptno,dname,loc) values(10,'ACCOUNTING','NEW YORK');
insert into dept(deptno,dname,loc) values(20,'RESEARCHING','DALLAS');
insert into dept(deptno,dname,loc) values(30,'SALES','CHICAGO');
insert into dept(deptno,dname,loc) values(40,'OPERATIONS','BOSTON');
insert into salgrade(grade,losal,hisal) values(1,700,1200);
insert into salgrade(grade,losal,hisal) values(2,1201,1400);
insert into salgrade(grade,losal,hisal) values(3,1401,2000);
insert into salgrade(grade,losal,hisal) values(4,2001,3000);
insert into salgrade(grade,losal,hisal) values(5,3001,5000);
insert into emp(empno,ename,job,mgr,hiredate,sal,comm,deptno)
values(7369,'SIMITH','CLERK',7902,'1980-12-17',800,null,20);
insert into emp(empno,ename,job,mgr,hiredate,sal,comm,deptno)
values(7499,'ALLEN','SALESMAN',7698,'1981-02-20',1600,300,30);
insert into emp(empno,ename,job,mgr,hiredate,sal,comm,deptno)
values(7521,'WARD','SALESMAN',7698,'1981-02-22',1250,500,30);
insert into emp(empno,ename,job,mgr,hiredate,sal,comm,deptno)
values(7566,'JONES','MANAGER',7839,'1981-04-02',2975,null,20);
insert into emp(empno,ename,job,mgr,hiredate,sal,comm,deptno)
values(7654,'MARTIN','SALESMAN',7698,'1981-09-28',1250,1400,30);
insert into emp(empno,ename,job,mgr,hiredate,sal,comm,deptno)
values(7698,'BLAKE','MANAGER',7839,'1981-05-01',2850,null,30);
insert into emp(empno,ename,job,mgr,hiredate,sal,comm,deptno)
values(7782,'CLARK','MANAGER',7839,'1981-06-09',2450,null,10);
insert into emp(empno,ename,job,mgr,hiredate,sal,comm,deptno)
values(7788,'SCOTT','ANALYST',7566,'1987-04-19',3000,null,20);
insert into emp(empno,ename,job,mgr,hiredate,sal,comm,deptno)
values(7839,'KING','PRESIDENT',null,'1981-11-17',5000,null,10);
insert into emp(empno,ename,job,mgr,hiredate,sal,comm,deptno)
values(7844,'TURNER','SALESMAN',7698,'1981-09-08',1500,null,30);
insert into emp(empno,ename,job,mgr,hiredate,sal,comm,deptno)
values(7876,'ADAMS','CLERK',7788,'1987-05-23',1100,null,20);
insert into emp(empno,ename,job,mgr,hiredate,sal,comm,deptno)
values(7900,'JAMES','CLERK',7698,'1981-12-03',950,null,30);
insert into emp(empno,ename,job,mgr,hiredate,sal,comm,deptno)
values(7902,'FORD','ANALYST',7566,'1981-12-03',3000,null,20);
insert into emp(empno,ename,job,mgr,hiredate,sal,comm,deptno)
values(7934,'MILLER','CLERK',7782,'1982-01-23',1300,null,10);
select * from dept;
select * from salgrade;
select * from emp;
2. 数据库操作
基本的数据库操作,就是使用一般的SQL语言。
# 创建新表
CREATE TABLE user_tbl(name VARCHAR(20), signup_date DATE);
# 插入数据
INSERT INTO user_tbl(name, signup_date) VALUES('张三', '2013-12-22');
# 选择记录
SELECT * FROM user_tbl;
# 更新数据
UPDATE user_tbl set name = '李四' WHERE name = '张三';
# 删除记录
DELETE FROM user_tbl WHERE name = '李四' ;
# 添加栏位
ALTER TABLE user_tbl ADD email VARCHAR(40);
# 更新结构
ALTER TABLE user_tbl ALTER COLUMN signup_date SET NOT NULL;
# 更名栏位
ALTER TABLE user_tbl RENAME COLUMN signup_date TO signup;
# 删除栏位
ALTER TABLE user_tbl DROP COLUMN email;
# 表格更名
ALTER TABLE user_tbl RENAME TO backup_tbl;
# 删除表格
DROP TABLE IF EXISTS backup_tbl;