常用巡检语句（oracle）

 -- 1. 查表空间大小
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 1