-- ------------------------------------------------------ -- 'Region' -- ------------------------------------------------------ DROP TABLE region; DROP SEQUENCE region_id_seq; DROP INDEX region_id_index; DROP VIEW vregion; CREATE TABLE region ( id integer DEFAULT nextval('region_id_seq') NOT NULL, region varchar(20) DEFAULT '' NOT NULL, description text , note text , remark text , create_date timestamp DEFAULT now() , modify_date timestamp DEFAULT now() , PRIMARY KEY (id), UNIQUE (id,region) ); CREATE SEQUENCE region_id_seq; CREATE INDEX region_id_index ON region (id); CREATE VIEW vregion AS SELECT pv.id,pv.region,pv.description,pv.note,pv.remark,to_char(pv.create_date,'YYYY-MM-DD HH:MI:SS') as date FROM region pv ORDER BY pv.id;
DROP SEQUENCE region_id_seq; CREATE SEQUENCE region_id_seq; member=> insert into region(region) values('广西'); INSERT 111264 1 member=> member=> insert into region(region) values('贵州'); INSERT 111265 1 member=> member=> insert into region(region) values('海南'); INSERT 111266 1 member=> member=> insert into region(region) values('河北'); INSERT 111267 1 member=> member=> insert into region(region) values('河南'); INSERT 111268 1 member=> member=> insert into region(region) values('黑龙江'); INSERT 111269 1 member=> select * from vregion ; id | region | description | note | remark | date ----+--------+-------------+------+--------+--------------------- 1 | 安徽 | | | | 2003-11-01 10:44:26 2 | 北京 | | | | 2003-11-01 10:44:26 3 | 重庆 | | | | 2003-11-01 10:44:26 4 | 福建 | | | | 2003-11-01 10:44:26 5 | 甘肃 | | | | 2003-11-01 10:44:26 6 | 广东 | | | | 2003-11-01 10:44:26 7 | 广西 | | | | 2003-11-01 10:44:26 8 | 贵州 | | | | 2003-11-01 10:44:26 9 | 海南 | | | | 2003-11-01 10:44:26 10 | 河北 | | | | 2003-11-01 10:44:26 11 | 河南 | | | | 2003-11-01 10:44:26 12 | 黑龙江 | | | | 2003-11-01 10:44:26 (12 rows)
DROP SEQUENCE region_id_seq; Delete from region; CREATE SEQUENCE region_id_seq INCREMENT 2 START 1; member=> DROP SEQUENCE region_id_seq; DROP SEQUENCE member=> Delete from region; DELETE 15 member=> member=> CREATE SEQUENCE region_id_seq INCREMENT 2 START 1; CREATE SEQUENCE member=> insert into region(region) values('广东'); INSERT 111282 1 member=> member=> insert into region(region) values('广西'); INSERT 111283 1 member=> member=> insert into region(region) values('贵州'); INSERT 111284 1 member=> member=> insert into region(region) values('海南'); INSERT 111285 1 member=> member=> insert into region(region) values('河北'); INSERT 111286 1 member=> member=> insert into region(region) values('河南'); INSERT 111287 1 member=> member=> insert into region(region) values('黑龙江'); INSERT 111288 1 member=> select * from region ; id | region | description | note | remark | create_date | modify_date ----+--------+-------------+------+--------+----------------------------+---------------------------- 1 | 安徽 | | | | 2003-11-01 11:49:58.004475 | 2003-11-01 11:49:58.004475 3 | 北京 | | | | 2003-11-01 11:49:58.093188 | 2003-11-01 11:49:58.093188 5 | 重庆 | | | | 2003-11-01 11:49:58.138582 | 2003-11-01 11:49:58.138582 7 | 福建 | | | | 2003-11-01 11:49:58.166903 | 2003-11-01 11:49:58.166903 9 | 甘肃 | | | | 2003-11-01 11:49:58.195132 | 2003-11-01 11:49:58.195132 11 | 广东 | | | | 2003-11-01 11:49:58.239133 | 2003-11-01 11:49:58.239133 13 | 广西 | | | | 2003-11-01 11:49:58.267372 | 2003-11-01 11:49:58.267372 15 | 贵州 | | | | 2003-11-01 11:49:58.295643 | 2003-11-01 11:49:58.295643 17 | 海南 | | | | 2003-11-01 11:49:58.324202 | 2003-11-01 11:49:58.324202 19 | 河北 | | | | 2003-11-01 11:49:58.352543 | 2003-11-01 11:49:58.352543 21 | 河南 | | | | 2003-11-01 11:49:58.381273 | 2003-11-01 11:49:58.381273 23 | 黑龙江 | | | | 2003-11-01 11:49:58.415112 | 2003-11-01 11:49:58.415112 (12 rows)
DROP SEQUENCE region_id_seq; Delete from region; CREATE SEQUENCE region_id_seq INCREMENT 2 START 2; member=> DROP SEQUENCE region_id_seq; ERROR: sequence "region_id_seq" does not exist member=> Delete from region; DELETE 0 member=> CREATE SEQUENCE region_id_seq INCREMENT 2 START 2; CREATE SEQUENCE member=> insert into region(region) values('安徽'); INSERT 111303 1 member=> insert into region(region) values('北京'); INSERT 111304 1 …… …… member=> insert into region(region) values('海南'); INSERT 111311 1 member=> insert into region(region) values('河北'); INSERT 111312 1 member=> select * from vregion; id | region | description | note | remark | date ----+--------+-------------+------+--------+--------------------- 2 | 安徽 | | | | 2003-11-01 12:00:28 4 | 北京 | | | | 2003-11-01 12:00:28 6 | 重庆 | | | | 2003-11-01 12:00:28 8 | 福建 | | | | 2003-11-01 12:00:28 10 | 甘肃 | | | | 2003-11-01 12:00:28 12 | 广东 | | | | 2003-11-01 12:00:28 14 | 广西 | | | | 2003-11-01 12:00:28 16 | 贵州 | | | | 2003-11-01 12:00:28 18 | 海南 | | | | 2003-11-01 12:00:28 20 | 河北 | | | | 2003-11-01 12:00:28 (10 rows)
原文出处:Netkiller 系列 手札
本文作者:陈景峯
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