********************************************** * Description: SQL for Querying Database Size * Compatiablity: RDBMS 10g, 11g, 12c * Date: 17:56 PM EST, 01/09/2017 ********************************************** <1> Introduction: | | |__ o. USEDGB = Total size of [ Data_File + Log_File + Temp_File occupied on disk storage ] | o. FREEGB = Total size of [ Free extend within all tablespaces ] | o. DBSIZEGB = USEDGB - FREEGB | | |__ SQL> select round(sum(used.bytes) / 1024 / 1024 /1024 ) usedGB, round(temp.temp_used /1024 / 1024 / 1024) tempUsed, round(free.p / 1024 / 1024 / 1024) freeGB, (round(sum(used.bytes) / 1024 / 1024 /1024 ))-(round(free.p / 1024 / 1024 / 1024)) dbSizeGB from (select bytes from dba_data_files union all select bytes from dba_temp_files union all select bytes from v$log) used, (select sum(bytes) as p from dba_free_space) free, (select nvl(sum(bytes),0) as temp_used from dba_temp_files) temp group by free.p, temp.temp_used; USEDGB TEMPUSED FREEGB DBSIZEGB ------- ---------- ---------- ---------- 88 20 20 68
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