SQL语句

  --查询oracle版本信息
  select * from v$version;

  --当前的连接数
  select count(*) from v$process;
  --数据库允许的最大连接数(默认150)
  select value from v$parameter where name = 'processes';

  --各DBF文件大小
  SELECT ROUND(a.BYTES/(1024*1024),2) AS "SIZE(M)", a.* FROM SYS.DBA_DATA_FILES a;

  --查询各表空间当前大小
  SELECT DD.TABLESPACE_NAME,
         ROUND(SUM(DD.BYTES) / (1024 * 1024), 2)  "表空间总大小(M)"
    FROM SYS.DBA_DATA_FILES DD
   GROUP BY DD.TABLESPACE_NAME;

  --查找分区表
  select table_name from user_tables where partitioned='YES';

  --查看分区表的索引
  select index_name,tablespace_name,table_name from user_indexes where PARTITIONED='YES' and table_name='TABLENAME';

  --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)",
         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 F.TABLESPACE_NAME;

  --各用户下对象占用空间大小
  SELECT owner, segment_name, ROUND(SUM(bytes)/1024/1024,2) AS "SIZE(M)" FROM dba_extents
   WHERE tablespace_name='KDCC_INDEX' GROUP BY owner,segment_name ORDER BY 3 DESC;

  --JOB查询
  select * from user_jobs m where m.WHAT like 'f_zqs%';