alter user wang set default_transaction_read_only=on;
grant all on database test to wang;
grant select on all database test to wang;
grant select on all tables in schema public to wang;   // 起作用的是這句 要進(jìn)入數(shù)據(jù)庫test 操作,在那個(gè)db環(huán)境執(zhí)行就授哪個(gè)db的權(quán)

ve=# grant all on schema public to foo ;
ve=# grant select,insert,update,delete on test to foo ;
ve=# grant select,insert,update,delete on public.test to foo ;

revoke all on database company from wang;   #撤銷用戶wang對(duì)數(shù)據(jù)庫company 的所有權(quán)限
revoke select on all tables in schema public from wang; 

lyy=# revoke all on test1 from public;
REVOKE
lyy=# revoke all on test2 from public;
REVOKE

lyy=# revoke all on pg_class from public;
REVOKE
lyy=# revoke all on pg_class from yy;
REVOKE

lyy=# ALTER TABLE test1 OWNER TO yy; 
lyy=# \q

/* 賦給用戶表的所有權(quán)限 */
GRANT ALL ON tablename TO user; 
/* 賦給用戶數(shù)據(jù)庫的所有權(quán)限 */
GRANT ALL PRIVILEGES ON DATABASE dbname TO dbuser;

/* 撤銷用戶權(quán)限 */
REVOKE privileges ON tablename FROM user;

/* 創(chuàng)建數(shù)據(jù)庫 */
create database dbname; 

/* 刪除數(shù)據(jù)庫 */
drop database dbname; 

/* 增加讓主鍵自增的權(quán)限 */
grant all on sequence tablename_keyname_seq to webuser;

 /* 重命名一個(gè)表 */
alter table [表名A] rename to [表名B]; 

/* 刪除一個(gè)表 */
drop table [表名]; 

/* 在已有的表里添加字段 */
alter table [表名] add column [字段名] [類型]; 

/* 刪除表中的字段 */
alter table [表名] drop column [字段名]; 

/* 重命名一個(gè)字段 */
alter table [表名] rename column [字段名A] to [字段名B]; 

/* 給一個(gè)字段設(shè)置缺省值 */
alter table [表名] alter column [字段名] set default [新的默認(rèn)值];

/* 去除缺省值 */
alter table [表名] alter column [字段名] drop default; 

/* 插入數(shù)據(jù) */
insert into 表名 ([字段名m],[字段名n],......) values ([列m的值],[列n的值],......); 

/* 修改數(shù)據(jù) */
update [表名] set [目標(biāo)字段名]=[目標(biāo)值] where ...; 

/* 刪除數(shù)據(jù) */
delete from [表名] where ...; 

/* 刪除表 */
delete from [表名];

/* 查詢 */
SELECT * FROM dbname WHERE ...;

/* 創(chuàng)建表 */
create table (
  [字段名1] [類型1] primary key,

postgres=# create user username with password '****';

postgres=# create database dbtest owner username; -- 創(chuàng)建數(shù)據(jù)庫指定所屬者

postgres=# grant all on database dbtest to username; -- 將dbtest所有權(quán)限賦值給username

psql -U username databasename < /data/dum.sql -- 用戶名和數(shù)據(jù)庫名

lyy=# \c - yy
FATAL: Peer authentication failed for user "yy"
Previous connection kept

psql -E -U yy -d lyy
Password for user yy:
psql: FATAL: permission denied for database "lyy"
DETAIL: User does not have CONNECT privilege.

#grant connect on database lyy to yy;