准备数据

前言

sql 皆用于 postgres

SQL

• 建表

CREATE TABLE IF NOT EXISTS public.dept
(
    deptno integer NOT NULL,
    dname character varying(20) COLLATE pg_catalog."default",
    loc character varying(20) COLLATE pg_catalog."default",
    CONSTRAINT dept_pkey PRIMARY KEY (deptno)
)

TABLESPACE pg_default;

CREATE TABLE IF NOT EXISTS public.emp
(
    empno integer NOT NULL,
    ename character varying(20) COLLATE pg_catalog."default",
    job character varying(20) COLLATE pg_catalog."default",
    mgr integer,
    hiredate date,
    sal numeric(7,2),
    comm numeric(7,2),
    deptno integer,
    CONSTRAINT emp_pkey PRIMARY KEY (empno),
    CONSTRAINT fk_deptno FOREIGN KEY (deptno)
        REFERENCES public.dept (deptno) MATCH SIMPLE
        ON UPDATE NO ACTION
        ON DELETE NO ACTION
        NOT VALID
)

TABLESPACE pg_default;

CREATE TABLE IF NOT EXISTS public.t1
(
    id integer NOT NULL,
    CONSTRAINT t1_pkey PRIMARY KEY (id)
)

TABLESPACE pg_default;

CREATE TABLE t10 AS SELECT * FROM t1 WITH NO DATA;
CREATE TABLE t100 AS SELECT * FROM t1 WITH NO DATA;
CREATE TABLE t500 AS SELECT * FROM t1 WITH NO DATA;

• 插入数据

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');

INSERT INTO EMP VALUES (7369,'SMITH','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); 
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,'1987-07-13',3000,NULL,20); 
INSERT INTO EMP VALUES (7839,'KING','PRESIDENT',NULL,'1981-11-07',5000,NULL,10); 
INSERT INTO EMP VALUES (7844,'TURNER','SALESMAN',7698,'1981-09-08',1500,0,30); 
INSERT INTO EMP VALUES (7876,'ADAMS','CLERK',7788,'1987-07-13',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);

INSERT INTO t1 (id) VALUES (1);
insert into public.t10 select generate_series(1,10);
insert into public.t100 select generate_series(1,100);
insert into public.t500 select generate_series(1,500);