Wrong results from "Select count(*) from tbl"

I am the user of an Oracle DB and I am getting what
look like wrong counts using "Select count(*)" statments.
It first occurred when I tried to get monthly record counts with
Select count(*), month
from tbl
group by month
(Note this is the query I used with the exception
of a change in the table name. The month field is numeric)
All the monthly counts but one looked like it was 2x what it should be.
Oddly enough if I tried
Select count(*), month
from tbl
where month = 200302
group by month
OR
Select count(*), month
from tbl
where month in (200301 200302)
group by month
I got what looked correct.
I even got the 2X problem when I asked for a count on
the entire table using
Select count(*)
from tbl
One of our DBAs suggested the problem has somehting to do with
the indexes and not running analyze on the table recently.
I'll note also that the table is partitioned.
I think it's Oracle version 8.1.7.4.0 running on a Sun box.
Has anyone seen this before or does anyone have any
suggestions on the cause of the problem?
I have been told it has to do with indexes
and I know there are many indexes on this table.
The table is also partitioned.
Thanks,
- john

plz copy and paste here your tests
i am running 8.1.7.4.0 too and all is fine here...
(i heard about a count(*) problem but on a lite version of an old 8.0.x...)
Fred

Similar Messages

What's wrong with my SELECT/COUNT(*) statement?

I am trying to get a total count of records related to a single master record within one table, and if I test this in the DW recordset wizard, I get the results I need. By testing it, I mean if I enter something other than the default -1, where there are results related to another 'master record', then I end up with the correct amount of rows, but when I test it in a browser, all I am getting is '0' for all records.
This bit of code is setting the 'master record ID' to which others will relate to:
<?php $_GET['trcount'] = $row_rs_replycount['fld_fID'] ?>
This is my recordset which is inline with the code which is inside a repeat region:
<?php
$threadreplys_rs_replycount = "3";
if (isset($_GET['trcount'])) {
$threadreplys_rs_replycount = $_GET['trcount'];
mysql_select_db($database_conn_mrs, $conn_mrs);
$query_rs_replycount = sprintf("SELECT *, COUNT(*) AS countTOT FROM tbl_forumPOSTS WHERE fld_fTHREADID = %s ORDER BY fld_fID DESC", GetSQLValueString($threadreplys_rs_replycount, "int"));
$rs_replycount = mysql_query($query_rs_replycount, $conn_mrs) or die(mysql_error());
$row_rs_replycount = mysql_fetch_assoc($rs_replycount);
$totalRows_rs_replycount = mysql_num_rows($rs_replycount);
?>
And this is the code to display the total number of records that are related
<?php echo $row_rs_replycount['countTOT']; ?>
As I say, I have it working when testing different default values in the recordset wizard, but not live on a page.
Thanks.

>"SELECT *, COUNT(*) AS countTOT FROM tbl_forumPOSTS WHERE....
That SQL is not valid - at least not by SQL standards. If your query contains an aggregate, then all columns that are not aggregated must be in a group by clause. It's possible that MySQL implicitly adds all non-aggreated columns to a group by, but you should probably fix it anyway. If you don't need to use the other columns from that table in the recordset, then just remove the * from the select list.
"SELECT COUNT(*) AS countTOT FROM tbl_forumPOSTS WHERE....
If you still have a problem, then output the value in $totalRows_rs_replycount to see if you are getting any rows returned from your query.
Next, comment out these lines:
if (isset($_GET['trcount'])) {
$threadreplys_rs_replycount = $_GET['trcount'];
to make sure any value in trcount is not interfering with the default value of '3' and see if that returns any results.

Crystal XI R2 giving wrong result from a query...

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Here is the Record Selection syntax
{CONTACT2.UBATSENDDT} = {?Date} OR
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Strange result from insert into...select query

Hello guys,
I need your preciuos help for a question maybe simple, but that I can't explain by myself!
I have a query of "insert into...select" that, as I have explained in the title, returns a strange result. In facts, If I execute ONLY the SELECT statement the query returns the expected result (so 2 rows); instead If I execute the entire statement, that is the "insert into...select", the query returns 0 rows inserted!!
Following an example of the query:
INSERT
INTO TITOLI_ORI
COD_TITOLO_RICCONS ,
D_ESTRAZIONE ,
COD_SOCIETA ,
COD_PIANO_CONTABILE ,
COD_CONTO_CONTABILE ,
COD_RUBRICATO_STATISTICO_1 ,
COD_NDG ,
NUM_ESEGUITO ,
CUR_IMPORTO_RICCONS ,
CUR_IMPORTO_BICO ,
FLG_MODIFICATO ,
CUR_NON_ASSEGNATO ,
FLG_QUOTATO ,
COD_CATEG ,
TIP_COPERTURA ,
TIPTAS_TITOLO
SELECT NEWID,
'28-feb-2111',
COD_SOCIETA,
COD_PIANO_CONTABILE,
COD_CONTO_CONTABILE,
COD_RUBRICATO_STATISTICO_1,
COD_NDG,
NUM_ESEGUITO,
CUR_VAL_IMPEGNI,
'ABC' as CUR_IMPORTO_BICO,
0 as FLG_MODIFICATO,
NULL as CUR_NON_ASSEGNATO,
FLG_QUOTATO,
COD_CATEG,
TIP_COPERTURA,
TIP_TASSO
FROM
(SELECT S.COD_SOC AS COD_SOCIETA,
S.TIP_PIANO_CNTB AS COD_PIANO_CONTABILE,
S.COD_CONTO_CNTB AS COD_CONTO_CONTABILE,
S.COD_RUBR_STAT AS COD_RUBRICATO_STATISTICO_1,
TRC.COD_RAGGR_IAS AS COD_RAGGRUPPAMENTO_IAS,
TRC.COD_NDG AS COD_NDG,
TRC.COD_ESEG AS NUM_ESEGUITO,
CAST((TRC.IMP_PLUS_MINUS_VAL/TRC.IMP_CAMB) AS FLOAT) AS CUR_VAL_IMPEGNI,
TRC.TIP_QUOTAZ AS FLG_QUOTATO,
TRC.COD_CAT_TIT AS COD_CATEG,
TIP_COP AS TIP_COPERTURA,
T.TIP_TASSO AS TIP_TASSO
FROM S_SLD_CNTB S
INNER JOIN
(SELECT DISTINCT COD_SOC,
TIP_PIANO_CNTB,
COD_CONTO_CNTB,
COD_RUBR_STAT ,
COD_INTER_TIT AS COD_INTER
FROM S_COLLEG_CONTO_CNTB_TIT
WHERE COD_SOC = 'ME'
) CCC
ON S.COD_SOC = CCC.COD_SOC
AND S.TIP_PIANO_CNTB = CCC.TIP_PIANO_CNTB
AND S.COD_CONTO_CNTB = CCC.COD_CONTO_CNTB
AND S.COD_RUBR_STAT = CCC.COD_RUBR_STAT
INNER JOIN S_TIT_RICCONS TRC
ON CCC.COD_INTER = TRC.COD_INTER_TIT
AND CCC.COD_SOC = TRC.COD_SOC
AND TRC.COD_RAGGR_IAS = RTRIM('VALUE1 ')
AND TRC.COD_RAGGR_IAS NOT IN ('VALUE2')
AND TRC.DES_TIP_SLD_TIT_RICCONS IN ('VALUE3')
AND TRC.DES_MOV_TIT = RTRIM('VALUE4 ')
AND TRC.COD_CAT_TIT = RTRIM('VALUE4 ')
AND TRC.COD_INTER_TIT = RTRIM('VALUE5')
AND '28-feb-2011' = TRC.DAT_RIF
LEFT JOIN S_TIT T
ON T.COD_INTER_TIT = TRC.COD_INTER_TIT
AND T.COD_SOC = TRC.COD_SOC
AND '28-feb-2011' = T.DAT_RIF
INNER JOIN S_ANAG_SOGG AG
ON TRC.COD_NDG = AG.COD_NDG
AND AG.COD_SOC = TRC.COD_SOC
AND '28-feb-2011' = AG.DAT_RIF
WHERE S.DAT_RIF = '28-feb-2011'
AND (S.FLG_ANULL_BICO = 0
OR S.FLG_ANULL_BICO IS NULL)
AND S.COD_SOC = 'V6'
AND LENGTH(RTRIM(S.COD_CONTO_CNTB)) = 10
AND S.TIP_PIANO_CNTB = 'V7'
AND TRC.IMP_PLUS_MINUS_VAL < 0
AND SUBSTR(S.COD_CONTO_CNTB,1,7) IN (RTRIM('VALUE8 '))
Thanks a lot

Right, I have executed this steps:
- I have changed the query with the select count(*)
- Changed the insert into with the select count(*)
- Executed the insert into
These are the result:
SQL> select count(*) from TITOLI_ORI2;
COUNT(*)
1
BUT:
SQL> select * from TITOLI_ORI2;
A
0
The insert into that I've modified is this:
INSERT INTO bsc.TITOLI_ORI2
select count(*)
FROM
(SELECT bsc.NEWID,
TO_DATE('28-feb-2111','DD-MON-YYYY') as data,
COD_SOCIETA,
COD_PIANO_CONTABILE,
COD_CONTO_CONTABILE,
COD_RUBRICATO_STATISTICO_1,
COD_NDG,
NUM_ESEGUITO,
CUR_VAL_IMPEGNI,
'ABC' AS CUR_IMPORTO_BICO,
0 AS FLG_MODIFICATO,
NULL CUR_NON_ASSEGNATO,
FLG_QUOTATO,
COD_CATEG,
TIP_COPERTURA,
TIP_TASSO
FROM
(SELECT S.COD_SOC AS COD_SOCIETA,
S.TIP_PIANO_CNTB AS COD_PIANO_CONTABILE,
S.COD_CONTO_CNTB AS COD_CONTO_CONTABILE,
S.COD_RUBR_STAT AS COD_RUBRICATO_STATISTICO_1,
TRC.COD_RAGGR_IAS AS COD_RAGGRUPPAMENTO_IAS,
TRC.COD_NDG AS COD_NDG,
TRC.COD_ESEG AS NUM_ESEGUITO,
CAST((TRC.IMP_PLUS_MINUS_VAL/TRC.IMP_CAMB) AS FLOAT) AS CUR_VAL_IMPEGNI,
TRC.TIP_QUOTAZ AS FLG_QUOTATO,
TRC.COD_CAT_TIT AS COD_CATEG,
TIP_COP AS TIP_COPERTURA,
T.TIP_TASSO AS TIP_TASSO
FROM bsc.S_SLD_CNTB S
INNER JOIN
(SELECT DISTINCT COD_SOC,
TIP_PIANO_CNTB,
COD_CONTO_CNTB,
COD_RUBR_STAT ,
COD_INTER_TIT AS COD_INTER
FROM bsc.S_COLLEG_CONTO_CNTB_TIT
WHERE COD_SOC = 'ME'
) CCC
ON S.COD_SOC = CCC.COD_SOC
AND S.TIP_PIANO_CNTB = CCC.TIP_PIANO_CNTB
AND S.COD_CONTO_CNTB = CCC.COD_CONTO_CNTB
AND S.COD_RUBR_STAT = CCC.COD_RUBR_STAT
INNER JOIN bsc.S_TIT_RICCONS TRC
ON CCC.COD_INTER = TRC.COD_INTER_TIT
AND CCC.COD_SOC = TRC.COD_SOC
AND TRC.COD_RAGGR_IAS = RTRIM('HFT ')
AND TRC.COD_RAGGR_IAS NOT IN ('GPO')
AND TRC.DES_TIP_SLD_TIT_RICCONS IN ('DISPONIBILI')
AND TRC.DES_MOV_TIT = RTRIM('CONSEGNARE ')
AND TRC.COD_CAT_TIT = RTRIM('OBBLIGAZIONE ')
AND TRC.COD_INTER_TIT = RTRIM('334058')
AND '28-feb-2011' = TRC.DAT_RIF
LEFT JOIN bsc.S_TIT T
ON T.COD_INTER_TIT = TRC.COD_INTER_TIT
AND T.COD_SOC = TRC.COD_SOC
AND '28-feb-2011' = T.DAT_RIF
INNER JOIN bsc.S_ANAG_SOGG AG
ON TRC.COD_NDG = AG.COD_NDG
AND AG.COD_SOC = TRC.COD_SOC
AND '28-feb-2011' = AG.DAT_RIF
WHERE S.DAT_RIF = '28-feb-2011'
AND (S.FLG_ANULL_BICO = 0
OR S.FLG_ANULL_BICO IS NULL)
AND S.COD_SOC = 'ME'
AND LENGTH(RTRIM(S.COD_CONTO_CNTB)) = 10
AND S.TIP_PIANO_CNTB = 'IS'
AND TRC.IMP_PLUS_MINUS_VAL < 0
AND SUBSTR(S.COD_CONTO_CNTB,1,7) IN (RTRIM('P044C11 '))
Another time the strange result returns!!
And I've created the table TITOLI_ORI2 as create table TITOLI_ORI2 (a number); to contain the number result of the query.

Count the number of rows resulting from a select statement

Hi,
Is there any way of counting the number of rows resulting from a select statement. i.e I have a select distinct statement and I then want to perform an IF statement on the number of rows resulting from the select statement.
Any help appreciated
Thanks
Gary

Declare
var1 number;
Begin
select count(distinct column_name) into
var1 from table_name;
If var1 > x Then
End IF;
End;
Hope I understood the problem correctly
null

Select count from large fact tables with bitmap indexes on them

Hi..
I have several large fact tables with bitmap indexes on them, and when I do a select count from these tables, I get a different result than when I do a select count, column one from the table, group by column one. I don't have any null values in these columns. Is there a patch or a one-off that can rectify this.
Thx

You may have corruption in the index if the queries ...
Select /*+ full(t) */ count(*) from my_table t
... and ...
Select /*+ index_combine(t my_index) */ count(*) from my_table t;
... give different results.
Look at metalink for patches, and in the meantime drop-and-recreate the indexes or make them unusable then rebuild them.

"select count(*) from dba_jobs_running" takes 5 minutes to return

Hi,
I login as sys or system from sql*plus to run query "select count(*) from dba_jobs_running". This query takes about 5 minutes to run.
Querying other DBA_* views returns instantly, only this dba_jobs_running view is troubling.
I have 11 records in dba_jobs, and 18 records in v$lock as usual.
No error or warning in logfile, no trace file.
What's possibly wrong with the server?
Thanks,
Harry

Hi,
The following are the exact statements I used to create the trace file:
alter session set timed_statistics=true;
alter session set max_dump_file_size=unlimited;
alter session set events '10046 trace name context forever, level 12';
select count(*) from dba_jobs_running;
exit;
The content of the trace file is attached at the end.
If it is CPU bound, I have no activity on the db host. I am solely using it to analyze this problem.
load averages: 0.02, 0.02, 0.07 22:16:38
48 processes: 47 sleeping, 1 on cpu
CPU states: 98.4% idle, 1.6% user, 0.0% kernel, 0.0% iowait, 0.0% swap
Memory: 1792M real, 983M free, 517M swap in use, 2937M swap free
PID USERNAME THR PRI NICE SIZE RES STATE TIME CPU COMMAND
655 oracle 1 59 0 0K 0K sleep 1:14 0.32% oracle
865 oracle 1 59 0 2072K 1184K cpu 0:00 0.14% top
667 oracle 1 59 0 0K 0K sleep 0:13 0.08% oracle
663 oracle 1 59 0 0K 0K sleep 0:27 0.07% oracle
665 oracle 1 59 0 0K 0K sleep 0:15 0.02% oracle
671 oracle 1 59 0 0K 0K sleep 0:00 0.02% oracle
645 oracle 18 59 0 0K 0K sleep 0:23 0.01% oracle
657 oracle 1 59 0 0K 0K sleep 0:14 0.00% oracle
649 oracle 1 59 0 0K 0K sleep 0:02 0.00% oracle
659 oracle 1 59 0 0K 0K sleep 0:01 0.00% oracle
251 root 20 59 0 3256K 2512K sleep 0:00 0.00% nscd
70 root 5 59 0 2864K 2096K sleep 0:00 0.00% picld
224 root 3 59 0 3912K 2008K sleep 0:00 0.00% automountd
271 root 1 59 0 4408K 1896K sleep 0:00 0.00% sendmail
588 oracle 1 59 0 2600K 1864K sleep 0:00 0.00% bash
Any help is greatly appreciated.
<-- TRACE FILE CONTENT -->
*** 2006-11-21 21:34:54.413
*** SESSION ID:(21.832) 2006-11-21 21:34:54.412
APPNAME mod='[email protected] (TNS V1-V3)' mh=0 act='' ah=0
=====================
PARSING IN CURSOR #1 len=69 dep=0 uid=0 oct=42 lid=0 tim=107123626140 hv=2004533713 ad='97219d80'
alter session set events '10046 trace name context forever, level 12'
END OF STMT
EXEC #1:c=0,e=346,p=0,cr=0,cu=0,mis=1,r=0,dep=0,og=4,tim=107123625473
WAIT #1: nam='SQL*Net message to client' ela= 11 p1=1650815232 p2=1 p3=0
WAIT #1: nam='SQL*Net message from client' ela= 6476024 p1=1650815232 p2=1 p3=0
=====================
PARSING IN CURSOR #1 len=37 dep=0 uid=0 oct=3 lid=0 tim=107130104260 hv=2246554324 ad='97c21958'
select count(*) from dba_jobs_running
END OF STMT
PARSE #1:c=0,e=548,p=0,cr=0,cu=0,mis=0,r=0,dep=0,og=4,tim=107130104237
BINDS #1:
EXEC #1:c=0,e=1412,p=0,cr=0,cu=0,mis=0,r=0,dep=0,og=4,tim=107130106034
WAIT #1: nam='SQL*Net message to client' ela= 12 p1=1650815232 p2=1 p3=0
*** 2006-11-21 21:40:53.931
FETCH #1:c=350760000,e=344612113,p=0,cr=2,cu=16652,mis=0,r=1,dep=0,og=4,tim=107474718456
WAIT #1: nam='SQL*Net message from client' ela= 1936 p1=1650815232 p2=1 p3=0
FETCH #1:c=0,e=6,p=0,cr=0,cu=0,mis=0,r=0,dep=0,og=0,tim=107474721309
WAIT #1: nam='SQL*Net message to client' ela= 8 p1=1650815232 p2=1 p3=0
*** 2006-11-21 21:56:30.972
WAIT #1: nam='SQL*Net message from client' ela= 915075702 p1=1650815232 p2=1 p3=0
XCTEND rlbk=0, rd_only=1
STAT #1 id=1 cnt=1 pid=0 pos=1 obj=0 op='SORT AGGREGATE (cr=2 r=0 w=0 time=100535896 us)'
STAT #1 id=2 cnt=0 pid=1 pos=1 obj=0 op='NESTED LOOPS (cr=2 r=0 w=0 time=100535876 us)'
STAT #1 id=3 cnt=5550 pid=2 pos=1 obj=0 op='MERGE JOIN CARTESIAN (cr=2 r=0 w=0 time=128639 us)'
STAT #1 id=4 cnt=10 pid=3 pos=1 obj=0 op='NESTED LOOPS OUTER (cr=2 r=0 w=0 time=5839 us)'
STAT #1 id=5 cnt=10 pid=4 pos=1 obj=69 op='FIXED TABLE FULL X$KSQRS (cr=0 r=0 w=0 time=4790 us)'
STAT #1 id=6 cnt=10 pid=4 pos=2 obj=202 op='INDEX UNIQUE SCAN OBJ#(202) (cr=2 r=0 w=0 time=561 us)'
STAT #1 id=7 cnt=5550 pid=3 pos=2 obj=0 op='BUFFER SORT (cr=0 r=0 w=0 time=90039 us)'
STAT #1 id=8 cnt=555 pid=7 pos=1 obj=16 op='FIXED TABLE FULL X$KSUSE (cr=0 r=0 w=0 time=1277 us)'
STAT #1 id=9 cnt=0 pid=2 pos=2 obj=0 op='VIEW (cr=0 r=0 w=0 time=344148954 us)'
STAT #1 id=10 cnt=105477 pid=9 pos=1 obj=0 op='UNION-ALL (cr=0 r=0 w=0 time=343814331 us)'
STAT #1 id=11 cnt=105476 pid=10 pos=1 obj=0 op='VIEW (cr=0 r=0 w=0 time=203487737 us)'
STAT #1 id=12 cnt=105476 pid=11 pos=1 obj=0 op='UNION-ALL (cr=0 r=0 w=0 time=202961626 us)'
STAT #1 id=13 cnt=0 pid=12 pos=1 obj=272 op='FIXED TABLE FULL X$KDNSSF (cr=0 r=0 w=0 time=13633786 us)'
STAT #1 id=14 cnt=105476 pid=12 pos=2 obj=72 op='FIXED TABLE FULL X$KSQEQ (cr=0 r=0 w=0 time=188317145 us)'
STAT #1 id=15 cnt=0 pid=10 pos=2 obj=253 op='FIXED TABLE FULL X$KTADM (cr=0 r=0 w=0 time=76301426 us)'
STAT #1 id=16 cnt=1 pid=10 pos=3 obj=254 op='FIXED TABLE FULL X$KTCXB (cr=0 r=0 w=0 time=62693462 us)'
STAT #1 id=16 cnt=1 pid=10 pos=3 obj=254 op='FIXED TABLE FULL X$KTCXB (cr=0 r=0 w=0 time=62693462 us)'
<---- END of TRACE FILE -->

'select count(*) from x' returns 5460 rows and 'Select * from x' returns 0 rows

As you can see in the next lines something is wrong in my Oracle (8.0.6 on Win NT 4.0 sp 6a) :
Oracle8 Enterprise Edition Release 8.0.6.0.0 - Production
With the Partitioning option
PL/SQL Release 8.0.6.0.0 - Production
SQLWKS> SELECT * FROM V_TERRA_TE;
PERIOD_DATE PERIOD_TIME TERRARCV TERRASND TERCV TESND
0 rows selected.
SQLWKS> SELECT COUNT(*) FROM V_TERRA_TE;
COUNT(*)
5460
1 row selected.
V_TERRA_TE is a complex join of 5 Tables :
CREATE OR REPLACE VIEW "ACTUATE".V_TERRA_TE AS Select to_date(to_char(p1.period_date,'YYYYMMDD'),'YYYYMMDD') "PERIOD_DATE",
to_date(to_char(p1.period_time,'HH24:MI'),'HH24:MI') "PERIOD_TIME",
to_number(p1.caudalrcv + ((p3.caudalrcv + p4.caudalrcv)*(confterrate.conexadslterra/confterrate.conexadsltotal))) "TERRARCV",
to_number(p1.caudalsnd + ((p3.caudalsnd + p4.caudalsnd)*(confterrate.conexadslterra/confterrate.conexadsltotal))) "TERRASND",
to_number((p2.caudalrcv * confterrate.pctinfonegocio) + ((p3.caudalrcv + p4.caudalrcv)*(confterrate.conexadslte/confterrate.conexadsltotal)))"TERCV",
to_number((p2.caudalsnd * confterrate.pctinfonegocio) + ((p3.caudalsnd + p4.caudalsnd)*(confterrate.conexadslte/confterrate.conexadsltotal)))"TESND"
from p1,p2,p3,p4,confterrate
where (p1.period_date=p2.period_date)and
(p1.period_date=p3.period_date)and
(p1.period_date=p4.period_date)and
(p1.period_time=p3.period_time)and
(p1.period_time=p4.period_time)and
(p1.period_time=p2.period_time)and
to_char(p1.period_date,'MMYYYY')=to_char(confterrate.period_datetime,'MMYYYY');
I think that some not reported error happens in the select * with some temporary space or similar but only the message '0 rows selected' is displayed (instead the real error)
Could somebody help me ?
Thanks in advance
Francisco

Forcing the Join/sort to be made on Disk (not on memory) the problem not happens. This demostrate that ORACLE has a VERY IMPORTANT BUG : It returns 0 rows wich is false.
To force it to work on disk i use this parameters :
alter session set sort_area_size=0
alter session set hash_join_enabled=false
Note : probably is not the best combination or use of parameters, but using it the query works as espected.

Bug 2679062 - Wrong results possible from multi-column INLIST - though stat

Hi,
The following test case is supplied in the metalink in bug no. 2871341, the base bug for this bug is 2679062.
REPRODUCIBILITY:
Reproduces constantly with simple test case below:
TEST CASE:
DROP TABLE A1
CREATE TABLE A1 (X1 VARCHAR2(10), X2 VARCHAR2(10))
REM *********** Create the second table: ***************
DROP TABLE A2
CREATE TABLE A2 (X1 VARCHAR2(10), X2 VARCHAR2(10))
INSERT INTO A1 VALUES ('1','2');
INSERT INTO A2 VALUES ('3','4');
COMMIT;
CREATE INDEX A1_X1 ON A1(X1 );
CREATE INDEX A1_X2 ON A1(X2);
CREATE INDEX A2_X1 ON A2(X1);
CREATE INDEX A2_X2 ON A2(X2);
CREATE OR REPLACE VIEW A_ALL AS SELECT * FROM A1 UNION ALL SELECT * FROM A2;
ANALYZE TABLE A1 COMPUTE STATISTICS;
ANALYZE TABLE A2 COMPUTE STATISTICS;
SELECT * FROM A_ALL;
SELECT * FROM A_ALL WHERE (X1='1' AND X2='2') ;
SELECT * FROM A_ALL WHERE ((X1='1' AND X2='2') OR (X1='3' AND X2='4'));
The 2nd query returns answer while the second is not !
The following is published in the 9.2.0.4 fixed bug list:
" 9204 - 2679062 - Wrong results possible from multi-column INLIST "
I have installed 9.2.0.4 patch set on a win 2000 machine Oracle and saw that the above case is actually solved but our application which has a very similar case doesn't.
After investigating I found the following test case that fails, it reproduces only when you have index on all columns (covering index):
drop table t1_1;
drop table t1_2;
create table t1_1(c1 number, c2 number, c3 number);
create table t1_2(c1 number, c2 number, c3 number);
create index t1_1_ix on t1_1(c1, c2, c3);
create index t1_2_ix on t1_2(c1, c2, c3);
create or replace view t1 as select * from t1_1 union all select * from t1_2;
insert into t1_1 values(1, 2, 100);
insert into t1_2 values(1, 2, 200);
commit;
analyze table t1_1 compute statistics;
analyze table t1_2 compute statistics;
prompt
prompt #######################################
prompt try 1 - works fine
prompt #######################################
prompt
select * from t1
where
(c1=1)
and
( (c2=2) and (c3=100)
prompt
prompt #######################################
prompt try 2 - works fine
prompt #######################################
prompt
select * from t1
where
(c1=1)
and
(c2=2) and (c3=200)
prompt
prompt #######################################
prompt try 3 - try 1 OR try 2 does not work !
prompt #######################################
prompt
select * from t1
where
(c1=1)
and
( ( (c2=2) and (c3=100) )
or
( (c2=2) and (c3=200) )
opened a TAR and wanted to share with you.
Tal Olier ([email protected]).

Hi,
The following test case is supplied in the metalink in bug no. 2871341, the base bug for this bug is 2679062.
REPRODUCIBILITY:
Reproduces constantly with simple test case below:
TEST CASE:
DROP TABLE A1
CREATE TABLE A1 (X1 VARCHAR2(10), X2 VARCHAR2(10))
REM *********** Create the second table: ***************
DROP TABLE A2
CREATE TABLE A2 (X1 VARCHAR2(10), X2 VARCHAR2(10))
INSERT INTO A1 VALUES ('1','2');
INSERT INTO A2 VALUES ('3','4');
COMMIT;
CREATE INDEX A1_X1 ON A1(X1 );
CREATE INDEX A1_X2 ON A1(X2);
CREATE INDEX A2_X1 ON A2(X1);
CREATE INDEX A2_X2 ON A2(X2);
CREATE OR REPLACE VIEW A_ALL AS SELECT * FROM A1 UNION ALL SELECT * FROM A2;
ANALYZE TABLE A1 COMPUTE STATISTICS;
ANALYZE TABLE A2 COMPUTE STATISTICS;
SELECT * FROM A_ALL;
SELECT * FROM A_ALL WHERE (X1='1' AND X2='2') ;
SELECT * FROM A_ALL WHERE ((X1='1' AND X2='2') OR (X1='3' AND X2='4'));
The 2nd query returns answer while the second is not !
The following is published in the 9.2.0.4 fixed bug list:
" 9204 - 2679062 - Wrong results possible from multi-column INLIST "
I have installed 9.2.0.4 patch set on a win 2000 machine Oracle and saw that the above case is actually solved but our application which has a very similar case doesn't.
After investigating I found the following test case that fails, it reproduces only when you have index on all columns (covering index):
drop table t1_1;
drop table t1_2;
create table t1_1(c1 number, c2 number, c3 number);
create table t1_2(c1 number, c2 number, c3 number);
create index t1_1_ix on t1_1(c1, c2, c3);
create index t1_2_ix on t1_2(c1, c2, c3);
create or replace view t1 as select * from t1_1 union all select * from t1_2;
insert into t1_1 values(1, 2, 100);
insert into t1_2 values(1, 2, 200);
commit;
analyze table t1_1 compute statistics;
analyze table t1_2 compute statistics;
prompt
prompt #######################################
prompt try 1 - works fine
prompt #######################################
prompt
select * from t1
where
(c1=1)
and
( (c2=2) and (c3=100)
prompt
prompt #######################################
prompt try 2 - works fine
prompt #######################################
prompt
select * from t1
where
(c1=1)
and
(c2=2) and (c3=200)
prompt
prompt #######################################
prompt try 3 - try 1 OR try 2 does not work !
prompt #######################################
prompt
select * from t1
where
(c1=1)
and
( ( (c2=2) and (c3=100) )
or
( (c2=2) and (c3=200) )
opened a TAR and wanted to share with you.
Tal Olier ([email protected]).

How do I execute "Select count(*) from table " in OCI

Hi,
I am new to OCI and so this question may seem stupid. I would like to know how to execute the query "select count(*) from <table>" using OCI V8 functionality? Also after how do I get the result into a integer datatype? I have gone through most of the demo programs but is is of little help to me.
Thanks in advance...
Regards,
Shubhayan.

Hi,
Here is sample code to give you some idea how to do it. If you want some more info let me know.
Pankaj
ub4 count;
// Prepare the statement.
char szQry = "SELECT count() FROM T1";
if(OCI_ERROR == OCIStmtPrepare(pStmthp, pErrhp, (unsigned char*)szQry, strlen(szQry), OCI_NTV_SYNTAX , OCI_DEFAULT) )
     cout << "Error in OCIStmtPrepare" << endl;
     exit(1);
// Bind the output parameter.
OCIDefine *pDefnpp;
if(OCI_ERROR == OCIDefineByPos ( pStmthp, &pDefnpp, pErrhp, 1,
&count, sizeof(ub4), SQLT_INT,
(dvoid *) 0, (ub2 *) 0, (ub2 *) 0,
                    OCI_DEFAULT) )
     cout << "Error in OCIDefineByPos" << endl;
     exit(1);
if(OCI_ERROR == OCIStmtExecute(pSvchp, pStmthp, pErrhp, 1, 0, NULL, NULL, OCI_DEFAULT) )
     cout << "Error in OCIStmtExecute" << endl;
     exit(1);

SUM the COUNT RESULTS from 2 Tables

If I have 2 seperate queries how can I sum the results of them
select count(*) from tableA;
select count(*) from tableB;
MAXIMO@tarml > select count(*) from tableA;
COUNT(*)
     500
MAXIMO@tarml > select count(*) from tableB;
COUNT(*)
     600
MAXIMO@tarml > I want a query that gets me the 1100?
I know people in here will know a simple solution that I can not find on the web?
Thanks in advance again as always...
Miller

You should have read your given link more closely: You would have found
select ( select count(*) from Table1 )
     + ( select count(*) from Table2 )
          as total_rows
from my_one_row_table --<---   replace with dual

Select Count(*) from Sample_table - how to get the count using JDBC?

Hi All,
It would be glad if anyone could help me with this. The problem is that I have to get the 'count' of records selected from a arbitrary table say, 'sample_table'. Is that possible to form the SQL in JDBC as
Select Count(*) from Sample_table
and get the value of the count? If yes, how?
Thanks in advance
Prabz

stmt = con.createStatement();
ResultSet recordcnt_rs = stmt.executeQuery("Select Count (*) as record_ctr From Sample_table");
recordcnt_rs.next();
record_ctr = recordcnt_rs.getInt("record_ctr");
hope this helps.

Select count(*) from table in oracle 11g with direct path read takes time

select count(*) from table takes long time, even more than couple of hours..
direct path read is the wait event which is almost is at 99%..
can u someone provide some info on this.. on solution.. thankx

knowledgespring wrote:
table has millions of records... 130 millions..
select count(*) from BIG_SIZE_TABLE; --- executed in sql plus command prompt.
Rows     Execution Plan
0 SELECT STATEMENT   MODE: ALL_ROWS
0   SORT (AGGREGATE)
0    TABLE ACCESS   MODE: ANALYZED (FULL) OF 'BIG_SIZE_TABLE' (TABLE)
Elapsed times include waiting on following events:
Event waited on                             Times   Max. Wait Total Waited
----------------------------------------   Waited ---------- ------------
SQL*Net message to client                       1        0.00          0.00
enq: KO - fast object checkpoint                1        0.01          0.01
Disk file operations I/O                       18        0.00          0.00
direct path read                            58921        0.34        418.54direct path read time waited is : 58921 total time waited: 418.54
That 418 seconds - not the hours you reported earlier. Is it possible that your connection to the database broke ?
On a typical system, by the way, you can usually turn one direct read for tablescan into 1MB, so your scan seems to have covered about 59 GB, which seems to be in the right sort of ballpark for 130M rows.
we have another query and when we test the query execution using v$sql, is_bind_sensitive =N, how to make is_bind_sensitive=Y all the time.. There is a hint /*+ bind_aware */ - I'd have to check whether or not it's documented at present. It might help.
I would be interested in hearing why you think the hint should be bind sensitive when the optimizer doesn't.
Regards
Jonathan Lewis

How to get result of Select from stored function.

I need to get result of select from a stored function.
In the end of my stored function I makes final select (four columns).
How it can be retrived from function?

Hi,
A function can only return one value, but it sounds like you want to return 4 values.
The one value that you return can be a record, with many columns, such as a ROWTYPE, or a TYPE that you define.
You can return an XMLTYPE that has whatever elements you want.
You can write a procedure that has several OUT parameters. (You can have OUT parameters in a function, but a lot of people find that confusing.)
In very special circumstance, you might consider returning a string that is a delimited list of values, such as '7639,SMITH,,17-DEC-1980'.
Someoneelse has a good point.
We could give a better answer if you ask a specific question, like:
"I have this table ...
I want a function such that, if I call it with these parameters ... I get ...
but if I call it like this ... then I get ..."

Select Count(*) from... returns zero, select * from... returns 4000 recs?

Hi,
I have an odd situation where "select count(*) from my_view where some_clause" returns 0, but the exact same query fetching the data (ie "select * from my_view where some_clause") works fine and fetches, correctly, 4000+ records.
I have tried dropping and recreating the view, and collecting DB stats again, but the problem persists.
I had a look at the explain plans and they are very different, but both the SQL statements work fine on a copy of the database taken with impdp.
Does anyone have any suggestions on what might be going on here ?
Any help would be appreciated, I've run out of ideas !
Dave
Edited by: user10281551 on 18-Sep-2008 00:43
Edited by: user10281551 on 18-Sep-2008 00:44

Maybe it's the bug that a function based index is present and gets incorrectly used in the select count(*) statement?
If that's not the case, then please show us more details, like the statement and both execution plans.
Regards,
Rob.

Wrong results from "Select count(*) from tbl"

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