postgresql 删除 数据库,表,索引
ehbg5391
9年前
来自: http://my.oschina.net/jimyao/blog/612695
postgresql 删除 数据库,表,索引
1. 删除数据库
-bash-3.2$ createdb abc -O testuser
CREATE DATABASE
-bash-3.2$ dropdb abc //dropdb删除数据库
DROP DATABASE
-bash-3.2$ createdb abc -O testuser
CREATE DATABASE
-bash-3.2$ psql -U testuser -d testuser
Welcome to psql 8.1.23, the PostgreSQL interactive terminal.
Type: \copyright for distribution terms
\h for help with SQL commands
\? for help with psql commands
\g or terminate with semicolon to execute query
\q to quit
testuser=> drop database abc; //登录后的删除数据库,注意,不能删除当前登录的数据库
DROP DATABASE
-bash-3.2$ createdb abc -O testuser
CREATE DATABASE
-bash-3.2$ dropdb abc //dropdb删除数据库
DROP DATABASE
-bash-3.2$ createdb abc -O testuser
CREATE DATABASE
-bash-3.2$ psql -U testuser -d testuser
Welcome to psql 8.1.23, the PostgreSQL interactive terminal.
Type: \copyright for distribution terms
\h for help with SQL commands
\? for help with psql commands
\g or terminate with semicolon to execute query
\q to quit
testuser=> drop database abc; //登录后的删除数据库,注意,不能删除当前登录的数据库
DROP DATABASE
//删除操作的前提是,你是超级用户,或者是该数据库的拥有者才行。表也一样,pgsql有一点很特别,就是库是你的,表不一定是你的。这个有点搞。
2. 删除索引
ERROR: cannot drop index testuser_id_pk because constraint testuser_id_pk on table test requires it
HINT: You may drop constraint testuser_id_pk on table test instead.
testuser_test=# drop index unique_name; //删除索引
DROP INDEX
HINT: You may drop constraint testuser_id_pk on table test instead.
testuser_test=# drop index unique_name; //删除索引
DROP INDEX
3. 删除表
testuser_test=# drop table test,test1; //删除表
DROP TABLE
testuser_test=# drop table test,test1; //删除表
DROP TABLE