【Oracle】常用SQL

1.创建用户

create user GZCS identified by 123456;

grant connect,resource,dba to GZCS;

2.查询当前用户，表清单

select table_name from dba_tables where owner='GZCS'

3.创建数据表空间

create tablespace GZCS   
datafile  'E:oracleproduct10.2.0oradataorclstbss_temp01.dbf'   
size 100m  
autoextend on  next 32m maxsize 2048m

 4.查看数据库编码

select * from nls_database_parameters where parameter ='NLS_CHARACTERSET';
select userenv('language') from dual;

 5.查看当前数据库

select name from V$DATABASE;

或者

select SYS_CONTEXT('USERENV','INSTANCE_NAME') from dual;