SPFILE SPFILE IS SERVER PARAMETER FILE SPFILE IS A SEMI BINARY FILE. WE CANNOT EDIT MANUALLY WE CAN EDIT AS DYNAMICALLY BY USING ALTER SYSTEM ITS SPECIALY MADE FOR RAC (REAL APPLICATION CLUSTER) WE CAN CREATE SPFILE AT ANY STAGE(nomount,mount,open) IF YOUR DATABASE… Read More
USER MANAGEMENT How to create user? Syntax sys>> create user <username> identified by <password>; Create user u1 identified by u1; How to assign the privileges to user? Grant connect,resource to u1; How to assign the tablespace to user? Alter user u1 default tablespace userdata; How… Read More
TABLESPACE MANAGEMENT WHAT IS TABLESPACE ? IT’S A LOGICAL LINK BETWEEN USER AND DATAFILES.IT IS LOGICAL STORAGE OF DATA DICTIONARY: EXTENTS INFORMATION WILL GET FROM BASE TABLES LOCAL: EXTENTS INFORMATION WILL GET FROM DATAFILE HEADERS TABLESPACE MANAGEMENT HOW TO CREATE THE TABLESPACE SYS>>… Read More
set linesize 1000 pagesize 0 feedback off trimspool onwithhwm as ( — get highest block id from each datafiles ( from x$ktfbue as we don’t need all joins from dba_extents ) select /*+ materialize */ ktfbuesegtsn ts#,ktfbuefno relative_fno,max(ktfbuebno+ktfbueblks-1) hwm_blocks from sys.x$ktfbue group by ktfbuefno,ktfbuesegtsn),hwmts as… Read More
Rebalance status : column “Diskgroup” format A30 column “Imbalance” format 99.9 Heading “Percent|Imbalance” column “Variance” format 99.9 Heading “Percent|Disk Size|Variance” column “MinFree” format 999.99 heading “Minimum|Percent|Free” column “DiskCnt” format 9999 Heading “Disk|Count” column “Type” format A10 Heading “Diskgroup|Redundancy” SELECT g.name “Diskgroup”, 100*(max((d.total_mb-d.free_mb)/d.total_mb)-min((d.total_mb-d.free_mb)/d.total_mb))/max((d.total_mb-d.free_mb)/d.total_mb) “Imbalance”,100*(max(d.total_mb)-min(d.total_mb))/max(d.total_mb) “Variance”, 100*(min(d.free_mb/d.total_mb))… Read More
Fragmented_Tables_List in HTML FORMAT : col spoolname new_value spoolname select ‘Fragmented_tables’||to_char(sysdate, ‘YYYYMONDD’)||’.html’ spoolname from dual; spool ‘&spoolname’ set pagesize 200 set markup html on WITH STAT_SPACE AS( SELECT OWNER, TABLE_NAME, NUM_ROWS, AVG_ROW_LEN, NUM_ROWS*AVG_ROW_LEN/1024/1024/1024 tbl_STAT_SPACE FROM DBA_TABLES WHERE OWNER=’SCOTT’), SEG_SPACE AS ( SELECT OWNER, SEGMENT_NAME, SEGMENT_TYPE,… Read More
Below are different kind of problems where you have recovery issues in standby. Before you take any decision check with your colleagues. 1) Check on source : SQL> select dest_id,error from v$archive_dest_status; 2) To know the redo apply rate : set linesize 500col item format… Read More
set linesize 140 pagesize 100select resource_name,current_utilization,limit_value from gv$resource_limit order by 1; Sample Output:
Check existing retention and current snapshot interval. set linesize 300 select extract( day from snap_interval) *24*60+extract( hour from snap_interval) *60+extract( minute from snap_interval ) snapshot_interval, extract( day from retention) *24*60+extract( hour from retention) *60+extract( minute from retention ) retention_interval, topnsql from dba_hist_wr_control; Below query is… Read More
DECLAREcount1 NUMBER := 0;total NUMBER := 0;CURSOR del_record_cur ISSELECT rowid FROM scott.emp WHERE empno<=20000;BEGINFOR rec IN del_record_cur LOOPDELETE FROM scott.emp WHERE rowid = rec.rowid;total := total + 1;count1 := count1 + 1;IF (count1 >= 1000) THEN COMMIT;count1 := 0;END IF;END LOOP;COMMIT;DBMS_OUTPUT.PUT_LINE(‘Deleted ‘ || total ||… Read More
