BY FWYANG 1 ORACLE 日常维护手册 查看数据库版本 SELECT * FROM V$VERSION; 查看数据库语言环境 SELECT USERENV('LANGUAGE') FROM DUAL; 查看ORACLE 实例状态 SELECT INSTANCE_NAME,HOST_NAME,STARTUP_TIME,STATUS,DATABASE_STATUS FROM V$INSTANCE; 查看ORACLE 监听状态 lsnrctl statu s 查看数据库归档模式 SELECT NAME,LOG_MODE,OPEN_MODE FROM V$DATABASE; 查看回收站中对象 SELECT OBJECT_NAME,ORIGINAL_NAME,TYPE FROM RECYCLEBIN; 清空回收站中对象 PURGE RECYCLEBIN; 还原回收站中的对象 FLASHBACK TABLE "BIN$GOZUQZ6GS222JZDCCTFLHQ==$0" TO BEFORE DROP RENAME TO TEST; BY FWYANG 2 闪回误删除的表 FLASHBACK TABLE AAA TO BEFORE DROP; 闪回表中记录到某一时间点 ALTER TABLE TEST ENABLE ROW MOVEMENT; FLASHBACK TABLE TEST TO TIMESTAMP TO_TIMESTAMP('2009-10-15 21:17:47','YYYY-MM-DD HH24:MI:SS'); 查看当前会话 SELECT SID,SERIAL#,USERNAME,PROGRAM,MACHINE,STATUS FROM V$SESSION; 查看 DDL锁 SELECT * FROM DBA_DDL_LOCKS WHERE OWNER = 'FWYANG'; 检查等待事件 SELECT SID, A.USERNAME, EVENT, WAIT_CLASS, T1.SQL_TEXT FROM V$SESSION A, V$SQLAREA T1 WHERE WAIT_CLASS <> 'Idle' AND A.SQL_ID = T1.SQL_ID; 检查数据文件状态 SELECT FILE_NAME,STATUS FROM DBA_DATA_FILES; 检查表空间使用情况 SELECT UPPER(F.TABLESPACE_NAME) "表空间名", D.TOT_GROOTTE_MB "表空间大小(M)", D.TOT_GROOTTE_MB - F.TOTAL_BYTES "已使用空间(M)", TO_CHAR(ROUND((D.TOT_GROOTTE_MB - F.TOTAL_BYTES) / D.TOT_GROOTTE_MB * 100, 2), '990.99') "使用比", F.TOTAL_BYTES "空闲空间(M)", BY FWYANG 3 F.MAX_BYTES "最大块(M)" FROM (SELECT TABLESPACE_NAME, ROUND(SUM(BYTES) / (1024 * 1024), 2) TOTAL_BYTES, ROUND(MAX(BYTES) / (1024 * 1024), 2) MAX_BYTES FROM SYS.DBA_FREE_SPACE GROUP BY TABLESPACE_NAME) F, (SELECT DD.TABLESPACE_NAME, ROUND(SUM(DD.BYTES) / (1024 * 1024), 2) TOT_GROOTTE_MB FROM SYS.DBA_DATA_FILES DD GROUP BY DD.TABLESPACE_NAME) D WHERE D.TABLESPACE_NAME = F.TABLESPACE_NAME ORDER BY 4 DES...
