Performance wise, a select statement is faster on a view or on a table??
Performance wise, a complex (with multi join) select statement is faster on a view or on a table??
Hi,
the purpose of a view is not to provide performance benefits, it's basically a way to better structure database code and data access. A view is nothing but a stored query. When the optimizer sees references to a view in a query, it tries to merge it (i.e. replace the view with its definition), but it some cases it may be unable to do so (in presence of analytic functions, rownum pseudocolumn etc.) -- in such cases views can lead to a performance degradation.
If you are interested in performance, what you need is a materialized view, which is basically a table built from a query, but then you need to decide how you would refresh it. Please refer to the documentation for details.
Best regards,
Nikolay
Similar Messages
-
How to select the data from a Maintainance View into an internal table
Hi All,
Can anybody tell me how to select the data from a Maintainance View into an internal table.
Thanks,
srinivas.HI,
You can not retrieve data from A mentenance view.
For detail check this link,
http://help.sap.com/saphelp_nw2004s/helpdata/en/cf/21ed2d446011d189700000e8322d00/content.htm
Regards,
Anirban -
Performance Issue in Select Statement (For All Entries)
Hello,
I have a report where i have two select statement
First Select Statement:
Select A B C P Q R
from T1 into Table it_t1
where ....
Internal Table it_t1 is populated with 359801 entries through this select statement.
Second Select Statement:
Select A B C X Y Z
from T2 in it_t2 For All Entries in it_t1
where A eq it_t1-A
and B eq it_t1-B
and C eq it_t1-C
Now Table T2 contains more than 10 lac records and at the end of select statement it_t2 is populated with 844003 but it takes a lot of time (15 -20 min) to execute second select statement.
Can this code be optimized?
Also i have created respective indexes on table T1 and T2 for the fields in Where Condition.
Regards,If you have completed all the steps mentioned by others, in the above thread, and still you are facing issues then,.....
Use a Select within Select.
First Select Statement:
Select A B C P Q R package size 5000
from T1 into Table it_t1
where ....
Second Select Statement:
Select A B C X Y Z
from T2 in it_t2 For All Entries in it_t1
where A eq it_t1-A
and B eq it_t1-B
and C eq it_t1-C
do processing........
endselect
This way, while using for all entries on T2, your it_t1, will have limited number of entries and thus the 2nd select will be faster.
Thanks,
Juwin -
Performance Issue in select statements
In the following statements, it is taking too much time for execution,Is there any best way to change these selection statements...int_report_data is my final internal table....
select fsplant fvplant frplant fl1_sto pl1_delivery pl1_gr pl2_sto pl2_delivery perr_msg into (dochdr-swerks,dochdr-vwerks,dochdr-rwerks,dochdr-l1sto,docitem-l1xblnr, docitem-l1gr,docitem-l2sto, docitem-l2xblnr,docitem-err_msg) from zdochdr as f inner join zdocitem as p on fl1_sto = pl1_sto where fsplant in s_werks and
fvplant in v_werks and frplant in r_werks and pl1_delivery in l1_xblnr and pl1_gr in l1_gr and p~l2_delivery in l2_xblnr.
move : dochdr-swerks to int_report_data-i_swerks,
dochdr-vwerks to int_report_data-i_vwerks,
dochdr-rwerks to int_report_data-i_rwerks,
dochdr-l1sto to int_report_data-i_l1sto,
docitem-l1xblnr to int_report_data-i_l1xblnr,
docitem-l1gr to int_report_data-i_l1gr,
docitem-l2sto to int_report_data-i_l2sto,
docitem-l2xblnr to int_report_data-i_l2xblnr,
docitem-err_msg to int_report_data-i_errmsg.
append int_report_data.
endselect.
Goods receipt
loop at int_report_data.
select single ebeln from ekbe into l2gr where ebeln = int_report_data-i_l2sto and bwart = '101' and bewtp = 'E' and vgabe = '1'.
if sy-subrc eq 0.
move l2gr to int_report_data-i_l2gr.
modify int_report_data.
endif.
endloop.
first Billing document (I have to check fkart = ZRTY for second billing *document..how can i write the statement)
select vbeln from vbfa into (tabvbfa-vbeln) where vbelv = int_report_data-i_l2xblnr or vbelv = int_report_data-i_l1xblnr.
select single vbeln from vbrk into tabvbrk-vbeln where vbeln = tabvbfa-vbeln and fkart = 'IV'.
if sy-subrc eq 0.
move tabvbrk-vbeln to int_report_data-i_l2vbeln.
modify int_report_data.
endif.
endselect.
Thanks in advance,
YadHi!
Which of your selects is slow? Make a SQL-trace, check which select(s) is(are) slow.
For EKBE and VBFA you are selecting first key field - in general that is fast. If your z-tables are the problem, maybe an index might help.
Instead of looping and making a lot of select singles, one select 'for all entries' can help, too.
Please analyze further and give feedback.
Regards,
Christian -
Performance in the select statement
Hi All,
(select a.siteid siteid,a.bpaadd_0 bpaadd_0,a.bpanum_0 bpanum_0,
case when a.bpaaddlig_0 = '' then '-' else a.bpaaddlig_0 end
address1,
case when a.bpaaddlig_1 = '' then '-' else a.bpaaddlig_1 end
address2,
case when a.bpaaddlig_2 = '' then '-' else a.bpaaddlig_2 end
address3,
case when a.bpades_0 = '' then '-' else a.bpades_0 end place,
case when a.cty_0 = '' then '-' else a.cty_0 end city,
case when a.poscod_0 = '' then '-' else a.poscod_0 end
pincode,
case when b.cntnam_0 = '' then '-' else b.cntnam_0 end
contactname,
case when b.fax_0 = '' then '-' else b.fax_0 end fax,
case when b.MOBTEL_0 = '' then '-' else b.MOBTEL_0 end mobile,
case when b.TEL_0 = '' then '-' else b.TEL_0 end phone,
case when b.web_0 = '' then '-' else b.web_0 end website,
c.zinvcty_0 zcity,c.bpainv_0 bpainv_0,c.bpcnum_0 bpcnum_0
from lbcreport.bpaddress@info a,lbcreport.contact@info b
,lbcreport.bpcustomer@info c
where (a.bpanum_0=b.bpanum_0) and (a.cty_0 = c.zinvcty_0) and
(a.siteid = c.siteid))
In the above query Is there any performance degradation could i proceed with same query
or any other solution is there to increase the speed of the query.
in one select statement these many cases are allowed ah?
Please could anybody help me in this?
Thanks in advance
bye
SrikaviChange you query as follows...
(select
a.siteid siteid,
a.bpaadd_0 bpaadd_0,
a.bpanum_0 bpanum_0,
nvl(a.bpaaddlig_0, '-') address1,
nvl(a.bpaaddlig_1,'-' ) address2,
nvl(a.bpaaddlig_2,'-' ) address3,
nvl(a.bpades_0,'-' ) place,
nvl(a.cty_0,'-' ) city,
nvl(a.poscod_0,'-' ) pincode,
nvl(b.cntnam_0,'-' ) end
contactname,
nvl(b.fax_0,'-' ) fax,
nvl(b.MOBTEL_0,'-' ) mobile,
nvl(b.TEL_0,'-' ) phone,
nvl(b.web_0,'-' ) website,
c.zinvcty_0 zcity,c.bpainv_0 bpainv_0,c.bpcnum_0 bpcnum_0
from
lbcreport.bpaddress@info a,
lbcreport.contact@info b,
lbcreport.bpcustomer@info c
where
(a.bpanum_0=b.bpanum_0) and
(a.cty_0 = c.zinvcty_0) and
(a.siteid = c.siteid))
/ For performace check the execution plan of the query.. also BluShadow's post
Regards
Singh -
Performance required in select statement
hi gurus,
my select statement below is taking around 15 sec to execute, need your help in this regard.
select single * from tablename where no = itab-no.
Thanks,
vjVIQMEL is not a table itself - it is a view of tables QMIH, QMEL and ILOA.
the field you are searching on (EQFNR) is a non-key field on table ILOA which is not an index field either.
This will be very slow depending on the size of the tables.
Is there any other data you can use to search by? perhaps it would be quicker to get extra key data for this view by reading some other tables first?
If not, you may need to add an index to ILOA for this field - I would check with SAP as adding indexes to standard tables such as this which already appears to have several indexes may have unforseen impacts on standard processing. Generally it is all right, but an extra index for the system to maintain can cause problems sometimes. -
Performance tunning for select statements using likp lips and vbrp
Dear all,
I have a report where i am using select statements using first on likp the for all entries of likp i am taking data from lips and then for all entries in lips i am taking data from vbrp by matching VGBEL and VGPOS. Now the problem is that when it fetches data from vbrp it is taking lot of time around 13mins. to fetch data from vbrp. How can i overcome the problem.
regards
AmitHi,
there is also no secondary index for preceding document in VBFA table.
You will also have to create it here.
Regards,
Przemysław -
Performance problem in SELECT statement
HI All,
How to improve the performance in given query?
Query is..
data : begin of tzdate OCCURS 0,
zdate like sy-datum,
end of tzdate.
data: p_adrnr like lfa1-lifnr.
SELECT single adrnr into p_adrnr
FROM lfa1
WHERE lifnr = ilifnr-lifnr
AND land1 IN s_land1.
CONCATENATE '%' p_adrnr '%' INTO email_objectid.
SELECT udate INTO table tzdate
FROM cdhdr
WHERE objectclas = 'ADRESSE'
AND objectid LIKE email_objectid
AND tcode IN r_tcode.
Regards,
-D.
Moderator message - Please see Please Read before Posting in the Performance and Tuning Forum before posting - post locked
Edited by: Rob Burbank on Sep 16, 2009 10:14 AMHI All,
How to improve the performance in given query?
Query is..
data : begin of tzdate OCCURS 0,
zdate like sy-datum,
end of tzdate.
data: p_adrnr like lfa1-lifnr.
SELECT single adrnr into p_adrnr
FROM lfa1
WHERE lifnr = ilifnr-lifnr
AND land1 IN s_land1.
CONCATENATE '%' p_adrnr '%' INTO email_objectid.
SELECT udate INTO table tzdate
FROM cdhdr
WHERE objectclas = 'ADRESSE'
AND objectid LIKE email_objectid
AND tcode IN r_tcode.
Regards,
-D.
Moderator message - Please see Please Read before Posting in the Performance and Tuning Forum before posting - post locked
Edited by: Rob Burbank on Sep 16, 2009 10:14 AM -
Problem with Select Statements
Hi All,
I have a performance problem for my report because of the following statements.
How can i modify the select statements for improving the performance of the report.
DATA : shkzg1h LIKE bsad-shkzg,
shkzg1s LIKE bsad-shkzg,
shkzg2h LIKE bsad-shkzg,
shkzg2s LIKE bsad-shkzg,
shkzg1hu LIKE bsad-shkzg,
shkzg1su LIKE bsad-shkzg,
shkzg2hu LIKE bsad-shkzg,
shkzg2su LIKE bsad-shkzg,
kopbal1s LIKE bsad-dmbtr,
kopbal2s LIKE bsad-dmbtr,
kopbal1h LIKE bsad-dmbtr,
kopbal2h LIKE bsad-dmbtr,
kopbal1su LIKE bsad-dmbtr,
kopbal2su LIKE bsad-dmbtr,
kopbal1hu LIKE bsad-dmbtr,
kopbal2hu LIKE bsad-dmbtr.
*These statements are in LOOP.
SELECT shkzg SUM( dmbtr )
INTO (shkzg1s , kopbal1s)
FROM bsid
WHERE bukrs = ibukrs
AND kunnr = ktab-kunnr
AND budat < idate-low
AND shkzg = 'S'
AND umskz EQ ''
GROUP BY shkzg.
ENDSELECT.
SELECT shkzg SUM( dmbtr )
INTO (shkzg1su , kopbal1su)
FROM bsid
WHERE bukrs = ibukrs
AND kunnr = ktab-kunnr
AND budat < idate-low
AND shkzg = 'S'
AND umskz IN zspgl
GROUP BY shkzg.
ENDSELECT.
SELECT shkzg SUM( dmbtr )
INTO (shkzg1h , kopbal1h)
FROM bsid
WHERE bukrs = ibukrs
AND kunnr = ktab-kunnr
AND budat < idate-low
AND shkzg = 'H'
AND umskz EQ ''
GROUP BY shkzg.
ENDSELECT.
SELECT shkzg SUM( dmbtr )
INTO (shkzg1hu , kopbal1hu)
FROM bsid
WHERE bukrs = ibukrs
AND kunnr = ktab-kunnr
AND budat < idate-low
AND shkzg = 'H'
AND umskz IN zspgl
GROUP BY shkzg.
ENDSELECT.
SELECT shkzg SUM( dmbtr )
INTO (shkzg2s , kopbal2s)
FROM bsad
WHERE bukrs = ibukrs
AND kunnr = ktab-kunnr
AND budat < idate-low
AND shkzg = 'S'
AND umskz EQ ''
GROUP BY shkzg.
ENDSELECT.
SELECT shkzg SUM( dmbtr )
INTO (shkzg2su , kopbal2su)
FROM bsad
WHERE bukrs = ibukrs
AND kunnr = ktab-kunnr
AND budat < idate-low
AND shkzg = 'S'
AND umskz IN zspgl
GROUP BY shkzg.
ENDSELECT.
SELECT shkzg SUM( dmbtr )
INTO (shkzg2h , kopbal2h)
FROM bsad
WHERE bukrs = ibukrs
AND kunnr = ktab-kunnr
AND budat < idate-low
AND shkzg = 'H'
AND umskz EQ ''
GROUP BY shkzg.
ENDSELECT.
SELECT shkzg SUM( dmbtr )
INTO (shkzg2hu , kopbal2hu)
FROM bsad
WHERE bukrs = ibukrs
AND kunnr = ktab-kunnr
AND budat < idate-low
AND shkzg = 'H'
AND umskz IN zspgl
GROUP BY shkzg.
ENDSELECT.>
Siegfried Boes wrote:
> Please stop writing answers if you understrand nothing about database SELECTS!
> All above recommendations are pure nonsense!
>
> As always with such questions, you must do an analysis before you ask! The coding itself is perfectly o.k., a SELECT with an aggregate and a GROUP BY can not be changed into a SELECT SINGLE or whatever.
>
> But your SELECTS mustr be supported by indexes!
>
> Please run SQL Trace, and tell us the results:
>
> I see 8 statements, what is the duration and the number of records coming back for each statement?
> Maybe only one statement is slow.
>
> See
> SQL trace:
> /people/siegfried.boes/blog/2007/09/05/the-sql-trace-st05-150-quick-and-easy
>
>
> Siegfried
Nice point there Siegfried. Instead of giving constructive suggestion, people here give a very bad suggestion on using SELECT SINGLE combined with SUM and GROUP BY.
I hope the person already look at your reply before he try using select single and wondering why he has error.
Anyway, the most important thing is how many loop expected for those select statements?
If you have like thousands of loop, you can expect a poor performance.
So, you should also look at how many times the select statement is called and not only performance for each select statement when you're doing SQL trace.
Regards,
Abraham -
Intersection in Select statement
Hi,
Do any one know about some intersection option in select statement.
My case is : I have 2 database tables say TAB1 and TAB2 . TAB1 has data (A, B, C, D) and TAB2 has data (B, D) now I want the output as (A and C) after joining these 2 tables and selecting.
That is I want the values of Table1 which are not there in Table2.
I have the option of selecting Table1 and then for all entries fetch Table2, then Loop at the Table & delete if record exists.
But this is creating performance issue as the number of records in both tables are in Lakhs.
So I wanted to know is there any option like Left Intersecion or some thing like left outer join and all, so that I can pick the dat in one select.
Thanks,
SameerIssue solved :
Sample Code
TYPES : BEGIN OF X_VBAK,
VBELN TYPE VBAK-VBELN,
AUBEL TYPE VBRP-AUBEL.
TYPES : END OF X_VBAK.
DATA : I_VBAK TYPE STANDARD TABLE OF X_VBAK.
DATA : I_VBAS TYPE STANDARD TABLE OF X_VBAK.
SELECT AVBELN BAUBEL INTO CORRESPONDING FIELDS OF TABLE I_VBAK FROM ( VBAK AS A
LEFT OUTER JOIN VBRP AS B ON AVBELN EQ BAUBEL ).
SORT I_VBAK BY VBELN.
delete ADJACENT DUPLICATES FROM i_vbak COMPARING ALL FIELDS.
DELETE I_VBAK WHERE AUBEL NE ''.
SORT I_VBAK BY VBELN.
SORT I_VBAS BY VBELN. -
Select statement takes very long to run with order by clause.
Hi all,
I have a select statement which when I run without the order by clause takes arround 2 minutes to run. But with the order by clause it goes on for ever. I am trying to access the database server through a network which is not too fast.
The select statement is based on 9 views which are again based on some views. It also has inline views and outer joins. These views and inline views can not be done away with.
When selected without the order by clause it gives 3215 records.
Anything like 2 to 3 minutes will be Ok.
Thanks.
--MalayThe select statement is as follows :-
SELECT f.system_name,
a.signal_type,
f.sys_signal_name,
a.bus_desc,
b.vl_ident,
b.vl_name,
b.src_mac,
b.src_mac_addr,
b.dest_mac,
b.dest_mac_addr,
b.network,
bb.bufr_size_in_bytes,
bb.bag_in_ms,
bb.is_rma_used,
bb.is_ic_used,
bb.sub_vl_cnt,
bb.skew_max_in_ns,
cc.msg_name,
c.src_ip,
c.src_ip_addr,
c.src_port,
c.dest_ip,
c.dest_ip_addr,
c.dest_port,
cc.rate_in_ms,
cc.tx_mode,
cc.protocol,
cc.port_type,
cc.msg_length_in_bytes,
d.mnemonic,
d.start_addr32,
d.lsb,
d.end_addr32,
d.msb,
d.format,
d.init_value,
d.fs_mnemonic,
d.fs_afdx_data_id,
d.digital_data_id,
DECODE(
d.digital_datatype,
NULL, '',
'UNUSED', '',
api$util.concat_column_data(
'api_'
|| d.digital_datatype,
'digital_data_id',
d.digital_data_id,
bool.FALSE
) AS data_details,
f.connection_id
|| '_'
|| a.digital_bus_id
|| '_'
|| b.afdx_vl_id
|| '_'
|| bb.afdx_output_id
|| '_'
|| c.afdx_frame_id
|| '_'
|| cc.afdx_msg_id
|| '_'
|| d.afdx_data_id AS KEY
FROM api_afdx a,
api_afdx_vl b,
api_afdx_output bb,
api_afdx_frame c,
api_afdx_msg cc,
api_afdx_data d,
vf_signal e,
(SELECT DISTINCT aa.signal_id,
cc.system_name,
bb.connection_id,
bb.sys_signal_name
FROM vf_nodes aa,
vf_connections bb,
vf_system cc
WHERE aa.connection_id = bb.connection_id
AND bb.system_id = cc.system_id) f
WHERE e.signal_id = f.signal_id(+)
AND e.digital_bus_id = a.digital_bus_id
AND a.digital_bus_id = bb.digital_bus_id(+)
AND bb.afdx_output_id = b.afdx_output_id(+)
AND b.afdx_vl_id = c.afdx_vl_id(+)
AND bb.afdx_output_id = cc.afdx_output_id(+)
AND cc.afdx_msg_id = d.afdx_msg_id(+)
ORDER BY f.system_name,
a.signal_type,
f.sys_signal_name,
b.vl_name,
cc.msg_name,
d.start_addr32,
d.lsb;
Where api_afdx ,
api_afdx_vl ,
api_afdx_output ,
api_afdx_frame ,
api_afdx_msg ,
api_afdx_data ,
vf_signal ,
vf_nodes ,
vf_connections ,
vf_system
are all views. -
Hello ,
I have very strange issue, Any select statement on few tables takes very long time( in fact it hangs) often but the same SQL runs in a second all other times in the same database. Please note that it is a simple select statement without any 'for update' clause.
After recycling the database, the select statement runs faster but this situation comes back after couple of days on the same set of tables.
We are using 9i release 2.
Can you please advise how to go about solving this type of issue.
Thanks.438628, Robert is correct in that the board would need to see an explain plan to have any chance of narrowing the problem down. If bind variable peeking is involved the plan may not match what Oracle is actually doing to solve the query.
When the problem occurs try looking in v$plan_table and see if the plan matches the explain plan output. A difference would be a clue that a reparse of sometype is being done so the plan could be different for each execution. The presence of child cursors would also point to something causing reparses.
Do any of the columns for this table involved in the where clause has histograms on them? What is the value of the spfile/init.ora parameter cursor_sharing?
If cursor_sharing is EXACT then bind variable peeking should not be the problem. If the parameter is SIMILAR or FORCE then it could be. On 9.2 I believe there is a bug that causes a reparse for every execution when SIMILAR is used so evey execution could be a different plan.
To check for skewed data just count the values in the column and then count by value. If the max(value_count) / count(*) is greater than a small percentage of the data then the column is skewed. The worse the skew the more likely that a plan chosen for a distinctive value is not a good plan for a non-distinctive value.
HTH -- Mark D Powell -- -
Order of records in o/p of select statement
Hi all
I have doubt regarding the select statement. I need to execute a select statement (with out any order ie with out "order by") which searchs a table. I want to know whether in any
circumstances the order of the records of the select statement is different.
sample select statement which I need to execute
select emp_no from emplyees where designation = 'programer'
in one word order of records of in the o/p of a select statement will be unique ?
(provided same query same, table,)
can u plz quote the link to get more information
regards
RenjithHi,
YES, you can
Do Order By Without Using Order By Clause
in your select statement.
I assume that you have unique data ( e.g. emp_no in Emp Table ) and you you do not want to use Order by clause.
Solution 1:
Select Emp_no
from Emp
group by Emp_no;
the o/p will be in the sorted in the Ascending order.
Solution 2: ( Only for columns holding Numeric Values )
Select Emp_No
From Emp
Where 99999 - Emp_no in ( Select 99999 - Emp_no from Emp );
Again this will sort the result will be in the Descending Order. you can use any big number instead of 99999 but it should be greater than Emp_no value.
Note: You Should only use this method on not very large tables coz of performance issue.
Hope this will solve your problem.
Any Comment on this, any body.
Thanks and Regards
There is always a solution to the problem, And if there is no solution of a problem then problem is not a problem. -
Restricting records in the select statement
Hi,
I have one requirement where in i need to restrict my select statement to get only 250 records in the output table.
Here are the select statements i am using....
SELECT a~ebeln
a~lifnr
a~ekgrp
b~werks
b~matnr
FROM ekko AS a INNER JOIN ekpo AS b
ON aebeln = bebeln
INTO TABLE i_ekko
WHERE a~ebeln IN r_ebeln AND
a~lifnr IN r_lifnr AND
a~ekgrp IN r_ekgrp AND
b~werks IN r_ewerk AND
b~matnr IN r_matnr AND
a~bstyp = 'F'.
IF NOT i_ekko[] IS INITIAL.
Select Vendor name
SELECT lifnr
name1
FROM lfa1
INTO TABLE i_lfa1
FOR ALL ENTRIES IN i_ekko
WHERE lifnr = i_ekko-lifnr.
Here if i restrict the first select statement to get only 250 records then i am not getting the desired record in the second select statement.
Could anyone let me know how to write the select statement.
Regards,
Rameshrestric the first select using up to 250.
sort the i_ekko by vendor name.
ex: sort i_ekko by lifnr.
use second select statement here. -
Will a explain plan consider a function in a select statement.
Hi gurus,
I have a question regarding explain plan.
I ran a query, which returns me explain plan with multiple CPU costs around 300K.
now i use a function, and the number of lines displayed in explain plan reduces from 12 to 8 lines.
What i dont understand is.. Is the explain plan considering the function in the select statement ?
ex.
explain plan for
select column1,
column2,
function(value1)
from case
where case_no = 1will a explain plan consider the functions in a select statement ?
Thank you.What i dont understand is.. Is the explain plan considering the function in the select statement ?Maybe there are tweaks which reveal more information from the explain plan, but a straightforward way won't necessarily expose any function call:
SQL> create or replace function get_dname (i_deptno integer)
return varchar2
as
l_dname dept.dname%type;
begin
select dname
into l_dname
from dept
where deptno = i_deptno;
return l_dname;
end get_dname;
Function created.
SQL> explain plan
for
select ename, deptno, get_dname (deptno) dname
from emp
where deptno = 10
Explain complete.
SQL> select * from table (dbms_xplan.display ())
PLAN_TABLE_OUTPUT
Plan hash value: 3956160932
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 5 | 45 | 3 (0)| 00:00:01 |
|* 1 | TABLE ACCESS FULL| EMP | 5 | 45 | 3 (0)| 00:00:01 |
Predicate Information (identified by operation id):
1 - filter("DEPTNO"=10)
13 rows selected.
SQL> truncate table plan_table
Table truncated.
SQL> explain plan
for
select ename, deptno
from emp
where deptno = 10
Explain complete.
SQL> select * from table (dbms_xplan.display ())
PLAN_TABLE_OUTPUT
Plan hash value: 3956160932
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 5 | 45 | 3 (0)| 00:00:01 |
|* 1 | TABLE ACCESS FULL| EMP | 5 | 45 | 3 (0)| 00:00:01 |
Predicate Information (identified by operation id):
1 - filter("DEPTNO"=10)
13 rows selected.
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