1. Connect To User "DATA_LMS"
SQL> Conn DATA_LMS/DATA_LMS-->
2. First It Will Create A Table Table Name "MY_STATS_TABLE" And Owner Of The Table "
SQL>begin
dbms_stats.CREATE_STAT_TABLE( ownname=>DATA_LMS
, stattab=>'MY_STATS_TABLE'
);
end;
/
3. Check The Table Got Created Or Not
SQL> desc MY_STATS_TABLE
Name Null? Type
------------------------------------- -------- ----------------
STATID VARCHAR2(30 CHAR)
TYPE CHAR(1 CHAR)
VERSION NUMBER
FLAGS NUMBER
C1 VARCHAR2(30 CHAR)
C2 VARCHAR2(30 CHAR)
C3 VARCHAR2(30 CHAR)
C4 VARCHAR2(30 CHAR)
C5 VARCHAR2(30 CHAR)
N1 NUMBER
N2 NUMBER
N3 NUMBER
N4 NUMBER
N5 NUMBER
N6 NUMBER
N7 NUMBER
N8 NUMBER
N9 NUMBER
N10 NUMBER
N11 NUMBER
N12 NUMBER
D1 DATE
R1 RAW(32)
R2 RAW(32)
CH1 VARCHAR2(1000 CHAR)
CL1 CLOB
4. Take Export Of Stats
SQL> begin
dbms_stats.export_schema_stats( ownname=>DATA_LMS
, stattab=>'MY_STATS_TABLE'
, statid=>'CURRENT_STATS'
);
end;
/
5. If we look at the contents of MY_STATS_TABLE, we will see rows for each different statistic type (T=Table, I=Index, C=Column, S=System).
SQL> select statid, type, count(*)
from my_stats_table
group by statid, type
/
Note:
If Currents Stats Are Not Satisfiying then we can revert the old Stats as Follows
--> Delete Current Stats
Table, column and index statistics can be deleted using the relevant delete procedures.
EXEC DBMS_STATS.delete_database_stats;--> For Complete DB
EXEC DBMS_STATS.delete_schema_stats('SCOTT');--> For Schema
EXEC DBMS_STATS.delete_table_stats('SCOTT', 'EMP');--> For Table
EXEC DBMS_STATS.delete_column_stats('SCOTT', 'EMP', 'EMPNO');--> For Column
EXEC DBMS_STATS.delete_index_stats('SCOTT', 'EMP_PK');--> For Index
EXEC DBMS_STATS.delete_dictionary_stats;--> For Dictionary stats
6. Import Old Stats:
begin
dbms_stats.import_schema_stats( ownname=>user(Username)
, stattab=>'MY_STATS_TABLE(Table_Name)'
, statid=>'CURRENT_STATS'
);
end;
/
Note: If We Want To Restore In Other DB Take Export Of The Stats Table "MY_STATS_TABLE" And Import, But Schema Name Should Same.
###################################################### All The Best ######################################################
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