#Oracle database size how to#How to check tablespace in Oracle: Learn about How to Check Tablespace in Oracle, tablespace free space, tablespace growth information, tablespace size, associated data files, tablespace sizeĪlter Table in Oracle: Alter table in oracle is used to modify a column, drop and add constraints, change the data type of the table column, change the table storage parametersĬreate table in oracle: Tables are the basic unit of data storage in an Oracle Database. We have given various queries and you can use them according to the requirement. Hope you like this article on how to check table size in the Oracle database. (I.INDEX_NAME = S.SEGMENT_NAME AND I.TABLE_NAME = UPPER('&TABNAME') AND INDEX_TYPE = 'LOB' AND I.OWNER = UPPER('&SCHEMA'))) (L.SEGMENT_NAME = S.SEGMENT_NAME AND L.TABLE_NAME = UPPER('&TABNAME') AND L.OWNER = UPPER('&SCHEMA'))) + We can use the below query to calculate the total size ACCEPT SCHEMA PROMPT 'Table Owner: ' The bytes for the LOB Index (Lob Locator) = from dba_indexes and dba_segments The bytes for the LOB segments => from dba_lobs and dba_segments where segment_type is LOBSEGMENT The bytes for the table => from dba_segments To calculate the total size for the table and the associated LOBS segments a sum of the following must occur: Select from the BYTES column in DBA_SEGMENTS for the table shows the table segment but does not include LOB (CLOB or BLOB) segments sizes. How to calculate the Size for the table containing LOB segments SQL> select * from table(dbms_space.OBJECT_GROWTH_TREND('SCOTT','EMP_DATA','TABLE')) If you are interested in row space consumed by the table, you can use below query select round((num_rows*avg_row_len/1024),2) used_space_bytes from dba_tables where table_name ='' The above queries will provide the space allocated in the database. Sum of the size of table for a particular schema select owner,sum(bytes)/1024/1024/1024 as "SIZE in GB" from dba_segments where owner='SCHEMA_NAME' and segment_type='TABLE' group by owner Where tables.tname = indexes.table_name(+) Select decode( nvl(rn,1), 1, tables.tname ) tname,ĭecode( nvl(rn,1), 1, tables.table_size ) table_size, Row_number() over (partition by table_name order by index_name) rnĪnd prior column_position+1 = column_position Substr( max(sys_connect_by_path( column_name, ', ' )), 3) scbp, (select to_char(bytes/1024/1024,'999,999.99') from user_segments where segment_name = INDEX_NAME and segment_type = 'INDEX') index_size Here is the query if you want to know space associated with the indexes on the table also with tables Where owner=’’ and segment_type='TABLE' order by 4 desc) where rownum ' and segment_name='TABLE' order by 4 desc ) where rownum 10 order by 4 desc Top 10 big tables in Particular schema select * from (select We can also use this query to find the top ten biggest tables in a particular schema or tablespace For the size in MB select segment_name as "Object Name"
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