oracle基本命令

一些基本的Oracle命令
基本命令
连接数据库
C:>SQLPLUS /NOLOG
SQL>CONN / AS SYSDBA
1.Oracle 关闭
SQL>SHUTDOWN (ABORT|IMMEDIATE|NORMAL)
2.Oracle 启动
SQL>STARTUP (REMOUNT|MOUNT|OPENT)
3.SQL> HELP SHOW
SHOW
----
Shows the value of a SQL*Plus system variable, or the
current SQL*Plus environment.
SHO[W] option
where option represents one of the following terms or clauses:
     system_variable
     ALL
     BTI[TLE]
     ERR[ORS] [{FUNCTION | PROCEDURE | PACKAGE | PACKAGE BODY | TRIGGER
        | VIEW | TYPE | TYPE BODY | DIMENSION | JAVA CLASS} [schema.]name]
     LNO
     PARAMETERS [parameter_name]
     PNO
     REL[EASE]
     REPF[OOTER]
     REPH[EADER]
     SGA
     SPOO[L]
     SQLCODE
     TT[ITLE]
     USER
SHOW SPOOL is not available in iSQL*Plus
4.TNSPING
TNS连接问题检测
TNSNAME.ORA
5.执行SQL Script
SQL>@C:\RUN.SQL
6.查看执行结果（开启/关闭）
SQL>SET ECHO ON(OFF)
7.常用配置
SQL>SET LINESIZE 1000
SQL>ECHO ON
SQL>SET TIMING ON
SQL>SPOOL C:\TEST.LOG
SQL>SELECT * from XXXXX
SQL>SPOOL OFF
8.授权
建立连接 GRANT CREATE SESSION TO USERNAME
移除连接 REVOKE CREATE SESSION TO USERNAME
其他授权
GRANT SELECT,INSERT,DELETE,UPDATE ON SCOTT.EMP TO USERNAME
确认更改
SQL>COMMIT
9.更改密码
Alter user username identified by password
10.察看Datafile
SQL>SELECT * from V$DATAFILE
11察看结构
SQL>DESC V$DATAFILE
12,察看DB File
SQL>SELECT * from V$DBFILE
13.察看Tablespace
SQL>SELECT * from V$TABLESPACE
14.察看SGA大小
SQL> SHOW PARAMETER SGA
15.更改 SGA大小，
SQL>ALTER SY