常用sql语句

Posted 2020-08-15

SELECT total.tablespace_name,       Round(total.MB, 2)           AS Total_MB,       Round(total.MB - free.MB, 2) AS Used_MB,       Round(( 1 - free.MB / total.MB ) * 100, 2)       || ‘%‘                       AS Used_Pct FROM   (SELECT tablespace_name,               Sum(bytes) / 1024 / 1024 AS MB        FROM   dba_free_space        GROUP  BY tablespace_name) free,       (SELECT tablespace_name,               Sum(bytes) / 1024 / 1024 AS MB        FROM   dba_data_files        GROUP  BY tablespace_name) total WHERE  free.tablespace_name = total.tablespace_name;