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 -- ====================================================================================

-- Script Name : pdb_db_growth_by_days.sql

-- Purpose     : Analyze Database Growth over Last N Days (User-Driven, PDB-aware)

-- Author      : ChatGPT for Raunak

-- Requirements: Run from SQL*Plus inside PDB with access to DBA_HIST_* views

-- ====================================================================================


SET ECHO OFF

SET LINESIZE 200

SET PAGESIZE 100

SET FEEDBACK OFF

SET VERIFY OFF

SET TRIMSPOOL ON


-- === Accept user input for days ===

ACCEPT v_days NUMBER PROMPT 'Enter number of days to analyze growth (e.g., 30): '


-- === Generate spool file with timestamp ===

COLUMN spool_file_name NEW_VALUE spool_file

SELECT 'db_growth_' || TO_CHAR(SYSDATE, 'YYYYMMDD_HH24MISS') || '.lst' AS spool_file_name FROM dual;

SPOOL &spool_file


-- === Column formatting ===

COLUMN START_TIME FORMAT A20

COLUMN END_TIME FORMAT A20

COLUMN TABLESPACE_NAME FORMAT A30

COLUMN GROWTH_GB FORMAT 9999.99

COLUMN OWNER FORMAT A20

COLUMN OBJECT_NAME FORMAT A30

COLUMN OBJECT_TYPE FORMAT A15

COLUMN GROWTH_MB FORMAT 999,999.99

COLUMN FIRST_SEEN FORMAT A20

COLUMN LAST_SEEN FORMAT A20

COLUMN INSTANCE_NUMBER FORMAT 999


PROMPT ============================================================================

PROMPT [1] Total Database Growth Over Last &v_days Days

PROMPT ============================================================================


SELECT 

    MIN(s.begin_interval_time) AS START_TIME,

    MAX(s.end_interval_time)   AS END_TIME,

    ROUND(MAX(used_gb) - MIN(used_gb), 2) AS TOTAL_DB_GROWTH_GB

FROM (

    SELECT 

        ss.snap_id,

        SUM(tsu.tablespace_usedsize * ts.block_size) / 1024 / 1024 / 1024 AS used_gb

    FROM 

        dba_hist_tbspc_space_usage tsu

        JOIN dba_hist_snapshot ss ON tsu.snap_id = ss.snap_id AND tsu.dbid = ss.dbid

        JOIN dba_tablespaces ts ON ts.ts# = tsu.tablespace_id

    WHERE 

        ss.begin_interval_time >= SYSDATE - &v_days

    GROUP BY 

        ss.snap_id

) growth

JOIN dba_hist_snapshot s ON s.snap_id = growth.snap_id;


PROMPT ============================================================================

PROMPT [2] Tablespace-wise Growth Over Last &v_days Days

PROMPT ============================================================================


SELECT 

    ts.name AS TABLESPACE_NAME,

    MIN(ss.begin_interval_time) AS START_TIME,

    MAX(ss.end_interval_time) AS END_TIME,

    ROUND((MAX(tsu.tablespace_usedsize) - MIN(tsu.tablespace_usedsize)) * ts.block_size / 1024 / 1024 / 1024, 2) AS GROWTH_GB

FROM 

    dba_hist_tbspc_space_usage tsu

    JOIN dba_hist_snapshot ss ON tsu.snap_id = ss.snap_id AND tsu.dbid = ss.dbid

    JOIN dba_tablespaces ts ON ts.ts# = tsu.tablespace_id

WHERE 

    ss.begin_interval_time >= SYSDATE - &v_days

GROUP BY 

    ts.name

HAVING 

    ROUND((MAX(tsu.tablespace_usedsize) - MIN(tsu.tablespace_usedsize)) * ts.block_size / 1024 / 1024 / 1024, 2) > 0

ORDER BY 

    GROWTH_GB DESC;


PROMPT ============================================================================

PROMPT [3] Top Growing Segments Over Last &v_days Days

PROMPT ============================================================================


SELECT 

    obj.owner,

    obj.object_name,

    obj.subobject_name,

    obj.object_type,

    ROUND(SUM(sss.space_used_delta) * 8 / 1024, 2) AS GROWTH_MB,

    MIN(s.begin_interval_time) AS FIRST_SEEN,

    MAX(s.end_interval_time) AS LAST_SEEN,

    MAX(s.instance_number) AS INSTANCE_NUMBER

FROM 

    dba_hist_seg_stat sss

    JOIN dba_hist_seg_stat_obj obj ON sss.obj# = obj.obj#

    JOIN dba_hist_snapshot s ON s.snap_id = sss.snap_id AND s.dbid = sss.dbid

WHERE 

    s.begin_interval_time >= SYSDATE - &v_days

GROUP BY 

    obj.owner, obj.object_name, obj.subobject_name, obj.object_type

HAVING 

    SUM(sss.space_used_delta) > 0

ORDER BY 

    GROWTH_MB DESC

FETCH FIRST 15 ROWS ONLY;


PROMPT ============================================================================

PROMPT Done. Report saved to &spool_file

PROMPT ============================================================================


SPOOL OFF


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