直接上菜:
select username,lockwait,status,machine,program from v$session where sid in
(select session_id from v$locked_object)
select sql_text from v$sql where hash_value in(select sql_hash_value from v$session where sid in
(select session_id from v$locked_object))
--查询数据库所有死锁进程
SELECT s.username,l.OBJECT_ID,l.SESSION_ID,s.SERIAL#,l.ORACLE_USERNAME,l.OS_USER_NAME,l.PROCESS
FROM V$LOCKED_OBJECT l,V$SESSION S WHERE l.SESSION_ID=S.SID;
---查出 SESSION_ID,SERIAL#
杀死进程:
alter system kill session '21,17293';
21--SESSION_ID; 17293--SERIAL#
--创建联合索引
create index idx_index on table(col1,col2,col3)
--查询执行计划
explain plan for
select * from tablewhere col1='5105609145' and col2='000220' and col3='2021'(执行语句)
select * from table(dbms_xplan.display)(查看执行计划)