Oracle 常用語句

create user dev identified by iampaawd;

grant connect, resource to dev;

select * from user_tables;

select * from user_tab_comments;
select * from user_col_comments;

select sql_id, sql_text from v$sql where sql_text like '%select distinct%';

select * from v$sql_plan where sql_id='3039j4pnpw0sf';
select * from table(dbms_xplan.display_cursor('3039j4pnpw0sf',0));
select * from table( dbms_xplan.display_cursor('3039j4pnpw0sf'));

select sequence_name, min_value, max_value, increment_by, last_number from user_sequences;

select sql_text, last_load_time,sql_id from v$sql where last_load_time is not null and sql_text like 'select%' order by last_load_time desc;

select name,datatype_string,value_string from v$sql_bind_capture where sql_id='0bgqvw16fpts0';

select count(*) from v$process;

select * from v$parameter where name = 'processes';

alter system set processes=1500 scope=spfile;

shutdown immediate;
startup;

select userenv('language') from dual;

select * from nls_database_parameters where parameter like '%characterset%';

select * from nls_instance_parameters;

su oracle

sqlplus /nolog
conn /as sysdba
alter database set time_zone='+8:00';
shutdown immediate;
startup mount
alter system enable restricted session;
alter system set job_queue_processes=0;
alter system set aq_tm_processes=0;
alter database open;
alter database character set internal_use zhs16gbk;
alter database national character set internal_use al16utf16;
select * from v$nls_parameters;
shutdown immediate;
startup
exit
exit

chmod 700 /home

su oracle
sqlplus /nolog
conn /as sysdba
create tablespace tbs_hisuser datafile '/home/tablespace01' size 100m autoextend on;
exit
exit

select t1.table_name as "表名稱",

t3.comments as "表說明",
t1.column_name as "欄位名稱",
t1.data_type as "資料型別",
t1.data_length as "長度",
t1.nullable as "是否為空",
t2.comments as "字段說明",
t1.data_default "預設值"
from cols t1 left join user_col_comments t2
on t1.table_name=t2.table_name and t1.column_name=t2.column_name
left join user_tab_comments t3
on t1.table_name=t3.table_name
where not exists ( select t4.object_name from user_objects t4
where t4.object_type='table'
and t4.temporary='y'
and t4.object_name=t1.table_name )
order by t1.table_name, t1.column_id;

--查詢鎖表

select b.owner, b.object_name, a.session_id, a.locked_mode
from v$locked_object a, dba_objects b
where b.object_id = a.object_id;
--查詢導致鎖表的session
select b.username, b.sid, b.serial#, logon_time
from v$locked_object a, v$session b
where a.session_id = b.sid
order by b.logon_time;
--kill session
alter system kill session 'sid,serial#';

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