SQL & PL/SQL :: Displaying N Number Of Rows From Large Result Set
Nov 29, 2012
I have a query that returns 11 Million rows but not all of them can be displayed in SQLDeveloper or DBVisualizer because of limited memory or other type of issues. I need to copy the entire result set to excel for further calculations.
Is there any way that i can select N number of rows out of my actual result set.
For example:
a) A result set contains 10 Million rows in total.
b) I want to display first 5 Million rows by executing a query
c) Then I want to display the remaining 5 Million rows by executing the query again with any parameter changes.
So all I want is to extract the rows of my actual result set in two or more executions, depending on the number of rows.
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Apr 30, 2013
Consider tables A,B,C,D,E,F. all are having 100000++ records Tables B,C,D are dependent on table A (with foreign key constraint). When I am deleting records from all tables, table B,C,D are taking max 30-40 seconds while table A is taking 30-40 mins. All tables are having indexes.
Method I have used:
1. Created Temp table
2. then deleted all records from B,C,D,E,F for all records in temp table for limit of 500.
delete from B where exists (select 1 from temp where b.col1=temp.col1);
3. Why it is taking too much time for deleting records in table A.
Is there any thing that during deleting data from such master table, it is referring to all dependent tables even if dependent data is not present ?
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Sep 18, 2010
I have a table test_test
Name Mark
------- ------
ABC 10
DEF 10
GHI 10
JKL 20
MNO 20
PQR 30
The result should be
mark count names
10 3 ABC,DEF,GHI
20 2 JKL,MNO
30 1 PQR
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Mar 18, 2013
writing the query, Output is shown below. facing problem in when converting columns into rows.
CREATE TABLE TESTTAB (IDNUM VARCHAR2(3),PLAN1 VARCHAR2(5),AMT1 NUMBER,PLAN2 VARCHAR2(5),AMT2 NUMBER,PLAN3 VARCHAR2(5),AMT3 NUMBER,PLAN4 VARCHAR2(5),AMT4 NUMBER,PLAN5 VARCHAR2(5),AMT5 NUMBER)
INSERT INTO TESTTAB VALUES('100','A01',9,'','','','','D04',300,'E05',900)
INSERT INTO TESTTAB VALUES('101','','','B02',56,'C03',24,'','','','')
INSERT INTO TESTTAB VALUES('102','A01',33,'','','C03',545,'','','E05',23)
[Code]...
My OUTPUT SHOULD BE LLIKE
IDNUM PLAN AMT
100 A01 9
100 D04 300
100 E05 900
101 B02 56
101 C03 24
102 A01 33
102 C03 545
102 E05 23
.
.
104 C03 44
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Nov 8, 2010
I was asked in a telephone interview about committing a delete ( a few million rows)in an oracle log table which had a trillion rows in total. He said that delete took 2 days.
Then he asked me if then commit is performed(assuming a huge rollback segments are allocated) how long does it take for that commit .
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Oct 20, 2012
I have table having below records.
empno ename deptno
101 a 10
102 b 20
103 c 10
104 d 20
105 e 30
Normal Output
deptno count(*)
-----------------
10 2
20 2
30 1
I want to display like this(rows into columns)
--------------------------------------------------------
Required Output
-------------
10 20 30
2 2 1
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Jul 8, 2012
In form i call a record from database table through execute_query. i have lov on ITEM_NO
i want to display on that form, no. of records of ITEM_NO which i select from the list. like if i have 10 records with item_no which i select from list is must show 1/10.
if i press the down arrow it should show next record of the same item_no.
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Sep 4, 2012
What is the first term in the Fibonacci sequence to contain 1000 digits?
DECLARE
f_num INTEGER;
n_num INTEGER;
h_num INTEGER;
[code]...
why I am getting this error?? Is there any problem in my code??
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Feb 14, 2012
POWER(47.3616, 27.1261) returns: 2.80403309600359E45 which causes "number precision too large" error in my variable which is defined as NUMBER(20,20).
I've tried ROUNDing and TRUNCing the product, but still get the same long output. The only thing that seems to work is SUBSTR.
Is that the ONLY way to deal with this? It seems like there would be a better way or is there another type I should use these super long decimal results?
SQL> SELECT POWER(47.3616, 27.1261) AS Exp_Val
2 FROM dual;
EXP_VAL
----------
2.8040E+45
SQL>
[code].....
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Mar 24, 2011
where I have to display the value of current cell in next following cells.The table structure is as follows :
ttdate - date
individualplanid - varchar(10); - train number
sch_deptime - number(8); - scheduled departure time in milli seconds
sch_arrtime - number(8); - scheduled arrival time in milli seconds
stn - varchar(10); - station short name
dep_delay - number(8); - dep delay in milli seconds
arr_delay - number(8); - arr delay in milli seconds
The delay is filled continuously by application software continuously.I want to make a query where I want a calculated field which does the prediction of train arrival on coming stations. This shall be done as the delay + sch_deptime for all the next stations. Following is a dataset :
individualplanid sch_deptime sch_arrtime stn arr_delay dep_delay
BO646NULL57900000BVINULL80000
BO646NULL58140000KILENULL40000
BO646NULL58320000MDDNULL20000
BO646NULL58530000GMNNULLNULL
BO646NULL59160000ADHNULLNULL
BO646NULL59550000STCNULLNULL
BO646NULL59940000BANULLNULL
BO646NULL60540000DDRNULLNULL
BO646NULL61200000BCLNULLNULL
BO64661800000NULLCCG12000NULL
[code]....
The last column (EAT) is calculated one. It shall be like as the dep_delay is updated the EAT for the following records shall be sch_deptime + dep_ delay. I did was something like this. The calculated field is cum_depdelay which is only the delay ( not sch_deptime + dep_delay ).
select ttdate,individualplanid td,station,sch_deptime,sch_arrtime,act_depdelay,
sum(act_depdelay) over ( partition by individualplanid order by sch_deptime rows between current row and unbounded following ) c_depdelay
from logtime where ttdate='14-Mar-2011' and individualplanid='BO646' order by sch_deptime,sch_arrtime;
[code]...
how shall i proceed ?
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Dec 7, 2012
How many types of pl/sql value or numeric errors are there and when occurs.Like as follows
1.ORA-06502: PL/SQL: numeric or value error: character string buffer too small
2.ORA-06502: PL/SQL: numeric or value error: number precision too large
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Aug 6, 2010
I have created a function that is used for splitting a comma separated string & give the output in tabular form.here is the function
Here I have used CLOB as my input string will be huge(greater than max limit of varchar2)
CREATE OR REPLACE TYPE SPLIT_TBL_CLOB AS TABLE OF CLOB;
CREATE OR REPLACE FUNCTION CSVTOSTRING_CLOB
(
P_LIST CLOB,
P_DEL VARCHAR2 := ','
) RETURN SPLIT_TBL_CLOB PIPELINED
[code]....
But here I am facing 2 problems.
1. The function is not accepting a large string & I am getting the error
ORA-01704: string literal too long
2. The function is going for an infinite loop.
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Nov 5, 2012
I need to generate random numbers from the range 71 million to 90 million. While generatind the same iam getting the value with decimal places.
How to generate with out decimal places ?
SQL> select ABS(dbms_random.value(71000000,90000000)) from dual;
ABS(DBMS_RANDOM.VALUE(71000000,90000000))
-----------------------------------------
87283730.7
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Feb 9, 2011
I need to export large number of records from select into the text file. It's about 2milion records.I can do it by PLSQL (see below) where executing of process takes time too much. How to export to text file faster?
DECLARE
fileid UTL_FILE.file_type;
BEGIN
fileid := UTL_FILE.fopen ('VRS_CEM', 'cust.txt', 'W');
UTL_FILE.put ( fileid, 'IMSI|MSISDN|CONTRACT');
UTL_FILE.NEW_LINE(fileid);
[code]....
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Feb 5, 2013
how to manage large number of record in ArrayList.i.e abc table has 20 million record and jvm size is 2 GB.
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May 7, 2010
We are facing one issue on one of the database. The database is generating large trace files(14000) from last two days. That consumes around 15G space on the disk. And the content of the trace files is not having any meaningful message to debug:
cat /apps/oracle/admin/fs90uat/bdump/fs90uat_p050_23966.trc
*** TRACE DUMP CONTINUES IN FILE /apps/oracle/admin/fs90uat/bdump/fs90uat_p050_23966.trc ***
Dump file /apps/oracle/admin/fs90uat/bdump/fs90uat_p050_23966.trc
*** TRACE DUMP CONTINUED FROM FILE /apps/oracle/admin/fs90uat/bdump/fs90uat_p050_23966.trc ***
... (Many lines with above message)
The alert log is having one repeated error yesterday:
Thu May 6 22:00:03 2010
Errors in file /apps/oracle/admin/fs90uat/bdump/fs90uat_j000_11811.trc:
ORA-12012: error on auto execute of job 2647927
ORA-04063: ORA-04063: package body "ORACLE_OCM.MGMT_DB_LL_METRICS" has errors
ORA-06508: PL/SQL: could not find program unit being called: "ORACLE_OCM.MGMT_DB_LL_METRICS"
ORA-06512: at line 1
The corresponding trace file is having error:
Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
ORACLE_HOME = /apps/oracle/product/10.2.0/db_1
System name: SunOS
Node name: corpqadb30
[Code] .......
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Oct 8, 2013
I have a report with single row having large number of columns . I have to use a scroll bar to see all the columns. Is it possible to design report in below format(half columns on one side of page, half on other side ofpage :
Column1DataColumn11DataColumn2DataColumn12DataColumn3DataColumn13DataColumn4DataColumn14DataColumn5DataColumn15DataColumn6DataColumn16DataColumn7DataColumn17DataColumn8DataColumn18DataColumn9DataColumn19DataColumn10DataColumn20Data I am using Apex 4.2.3 version on oracle 11g xe.
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Mar 9, 2010
How to get rows N times in a result set?
For obscure test purposes I need to modify an existing SQL query to emit the rows N times instead once. I'm aware of the possibility to "UNION ALL" the query with itself to get the all rows twice.
But as I require the resulting rows to be emitted around ten to hundred times this approach doesn't seem sensible to me. Not to speak of the missing possibility to parametrize the number of "repetitions".
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Oct 29, 2013
How can i retrieve result of multiple rows into single row. Ex
select ename from emp;
Ename:
--------
ALLEN
WARD
JONES
MARTIN
BLAKE
[Code]...
Result should be like
ALLEN,WARD,JONES,MARTIN,BLAKE,CLARK,SCOTT,KING,TURNER,ADAMS,JAMES,FORD,MILLER
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Sep 10, 2013
What is the easiest way to add 2 rows together? I need this results set below as is except I need rows with activity codes 0 and 30 to be merged together into Activity Code 0. So, Regular hours would be 7466.75. Do I need to do a Union or is there a more elegant solution?
My current sql results set looks something like this:
Activity Code Activity Code Desc REGULAR OT NONPROD DEPARTMENT
0 0: Business As Usual 7409.25 305.5 1603.25 Information Technology
10 10: Special Projects 190.75 17 0 Information Technology
20 20: Strategic Initiatives 1067 52 0 Information Technology
30 0: Business As Usual 57.5 0 0 Information Technology
and I want my new results to look like this:
Activity Code Activity Code Desc REGULAR OT NONPROD DEPARTMENT
0 0: Business As Usual 7466.75 305.5 1603.25 Information Technology
10 10: Special Projects 190.75 17 0 Information Technology
20 20: Strategic Initiatives 1067 52 0 Information Technology
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Jul 9, 2012
Im trying to generate this link on my result [URL].....
materialId and materialFolderId are the results of my query.. Im not sure how to combine my results and string on my query..
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Jul 10, 2012
My requirement is as follows .
Oracle version details
BANNER
Oracle Database 11g Enterprise Edition Release 11.1.0.7.0 - Production
PL/SQL Release 11.1.0.7.0 - Production
CORE 11.1.0.7.0 Production
TNS for 32-bit Windows: Version 11.1.0.7.0 - Production
[code]....
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Jun 28, 2011
I have procedure that is used by trigger but I define it as Varchar2 it's result show number.
change my PLSQL to use as varchar,
If trigger fired, the procedure make this query
select CB_SMS_FLAG, CB_SMS_DT from TM_SFS_CUST_04 where CUST_NUM = 01071234151;
but I want this query
select CB_SMS_FLAG, CB_SMS_DT from TM_SFS_CUST_04 where CUST_NUM ='01071234151';
because CUST_NUM is VARCHAR2(12)
so it can use index appropriately.
how can I change my PLSQL this sentence,
v_sel_sql1 := 'select CB_SMS_FLAG, CB_SMS_DT from ' || pTBL_NM ||' where CUST_NUM = ' || pCUST_NUM;
Here my code
CREATE OR REPLACE PROCEDURE ORAASFS.P_TM_SFS_CB_SMS_CNT_upd_104(
gKIND VARCHAR2,
pCUST_NUM VARCHAR2,
pSMS_CNT NUMBER,
pSMS_CLC VARCHAR2,
pRD_FLAG VARCHAR2,
[Code]....
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Jun 6, 2008
I am trying to retrieve all rows with the date of May 23rd, 2008. Our data is stored with the date and time.
How do I format the where clause so that the time is taken off? I am still a newbie with oracle and what I have is this:
Select Distinct Table1.*, Table2.*
from Table1, Table2
where Table1.file_name = Table2.file_name
and Table1.downloaded_date = Table2.date_loaded
and downloaded_date = '23/May/2008'
Of course, it's the last line not working because I don't know how to format it and no rows are retrieved when there are definately May 23rd rows stored in there.
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Oct 29, 2012
There are 4 rows in table with stat_flag 'Updated Record' and stat_date with todays date.
stat date has date & time both, for that reason just trying to format with yyyy.mm.dd
I am getting zero rows as result.
where STAT_FLAG = 'Updated Record' and to_date(stat_date,'yyyy.mm.dd') = to_date(sysdate(),'yyyy.mm.dd')
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May 4, 2010
The below sql is giving different number of result sets while adding further columns in select clause.i.e After adding the columns 4,5,6 in the below query its giving different number of result set.In this case the result set count would be 5.
Before adding the columns 4,5,6,the result set count was 11.
SELECT PAYMENT_METHOD_MAP.NETTINGGROUP_ID,
PAYMENT_METHOD_MAP.CREDITPAYMENTMETHOD_CD,
PAYMENT_METHOD_MAP.DEBITPAYMENTMETHOD_CD,
PAYMENT_METHOD_MAP.AGENT_ID,
SETTLEMENT.NETTINGGROUP_ID,
SETTLEMENT.SETTLEMENTDATE
[code]....
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Jul 4, 2013
I would like to know if using varchar parameter in sql queries with number column can result in performance degrade.
Ex: Procedure testa ( myparam varchar) is
begin
select col1 into var1 from table where colno = myparam;
end;
Here col no is a number column and myparam is varchar. I feel its better to change the parameter to number.
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Jul 7, 2012
Where filter middle_rows save before join and grop by operation?
It is save rows in PGA Private SQL Area or save blocks in SGA databuffer?
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Feb 1, 2012
I have the following Union All query. It throws the following error in SQL plus
ERROR at line 27: ORA-01789: query block has incorrect number of result columns
After doing some google for the above error it suggests there are incorrect number of columns in the Union All query.I could not figure out the exact location well SQl Plus says error is on line 27 at the first opening bracket like
(Select distinct c.contact_code
Following is the SQL query
Select
tbl_contact.contact_code,
contact_title
||'.'||contact_name contact_name,
contact_address,
[Code] ......
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Jan 15, 2011
how can I select whole table in parts of 100 rows?
If I have primary key I can:
CODEstart=0;
end=100;
select * from table where ID>=start_point and ID<end;
start=end;
end=end+100;
and repeat:
CODEselect * from table where ID>=start_point and ID<end;
How can I do it without primary key? Is there another posibility to getting 100 number of rows? Maybe using rowid?
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