1 运行SQLPLUS工具 sqlplus
2 以OS的默认身份连接 / as sysdba
3 显示当前用户名 show user
4 直接进入SQLPLUS命令提示符 sqlplus /nolog
5 在命令提示符以OS身份连接 connect / as sysdba
6 以SYSTEM的身份连接
connect system/xxxxxxx@服务名
7 显示当然用户有哪些表 select * from tab;
8 显示有用户名和帐户的状态
select username,account_status from dba_users;
9 将SCOTT帐号解锁(加锁)
alter user scott account unlock(lock);
10 以SCOTT的身份连接并且查看所属表 connect scott/tiger select * from tab;
11 查看EMP的表结构及记录内容 desc emp
select empno,ename from emp;
12 以OS的身份登看SGA,共享池,CACHE的信息 connect / as sysdba show sga
select name,value/1024/1024 from v$sga; show parameter shared_pool_size
select value/1024/1024 from v$parameter where name ='shared_pool_size';
show parameter db_cache_size
select value/1024/1024 from v$parameter where name ='db_cache_size';
13 查看所有含有SIZE的信息 show parameter size
bitmap_merge_area_size integer 1048576 create_bitmap_area_size integer 8388608 db_16k_cache_size big integer 0 db_2k_cache_size big integer 0 db_32k_cache_size big integer 0 db_4k_cache_size big integer 0 db_8k_cache_size big integer 0 db_block_size integer 4096
db_cache_size big integer 33554432 db_keep_cache_size big integer 0 db_recycle_cache_size big integer 0
NAME TYPE VALUE
------------------------------------ ----------- ------------- global_context_pool_size string hash_area_size integer 1048576
java_max_sessionspace_size integer 0 java_pool_size big integer 33554432 large_pool_size big integer 8388608 max_dump_file_size string UNLIMITED
object_cache_max_size_percent integer 10 object_cache_optimal_size integer 102400 olap_page_pool_size integer 33554432
oracle_trace_collection_size integer 5242880 parallel_execution_message_size integer 2148
NAME TYPE VALUE
------------------------------------ ----------- ------------- sga_max_size big integer 143727516
shared_pool_reserved_size big integer 2516582 shared_pool_size big integer 50331648 sort_area_retained_size integer 0 sort_area_size integer 524288 workarea_size_policy string AUTO
14 显示SGA的信息
select * from v$sgastat; POOL NAME BYTES
----------- -------------------------- ----------
fixed_sga 453532
buffer_cache 33554432 log_buffer 656384
shared pool subheap 46884 shared pool KGK heap 3756 shared pool KQR M PO 586792 shared pool KQR S PO 180232 shared pool KQR S SO 5128 shared pool sessions 410720 shared pool sql area 2144664 shared pool 1M buffer 2098176
POOL NAME BYTES
----------- -------------------------- ---------- shared pool KGLS heap 901756 shared pool parameters 8352
shared pool free memory 38687204 shared pool PL/SQL DIANA 420816 shared pool FileOpenBlock 695504 shared pool PL/SQL MPCODE 135692 shared pool library cache 2985576 shared pool miscellaneous 4889396 shared pool MTTR advisory 21164 shared pool PLS non-lib hp 2068 shared pool XDB Schema Cac 4966300
POOL NAME BYTES
----------- -------------------------- ---------- shared pool joxs heap init 4220 shared pool kgl simulator 563260 shared pool sim memory hea 44184 shared pool table definiti 1728 shared pool trigger defini 1896 shared pool trigger inform 1140 shared pool trigger source 448 shared pool type object de 69120 shared pool Checkpoint queue 282304 shared pool VIRTUAL CIRCUITS 265160 shared pool dictionary cache 1610880
POOL NAME BYTES
----------- -------------------------- ---------- shared pool KSXR receive buffers 1033000 shared pool character set object 323724