SQL & PL/SQL :: Update Column In A Table Which Has 3 Columns Of 16 Million Rows?
Apr 25, 2012
trying to update a column in a table which has 3 columns of 16million rows from column in another table which has 1million rows, there is no relationship between the 2 tables.
Table A has 3 columns of 16million rows, the first two columns have 16million ID numbers, the 3rd colunm is currently NULL.
Table B has 1million Numbers, i need to somehow update column 3 in table A using the numbers in table B, it doesnt how many times each of the 1 million numbers are used but i dont want it to just update every row to the same value.
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Feb 15, 2011
I am trying to update a million rows in one table with the values from another tables.
Table being updated CI_ADJ_CHAR column CHAR_VAL_FK1
Table from which values will be used CK_ADJ columns (cx_id, ci_id)
The CI_ADJ_CHAR.CHAR_VAL_FK1 values match CK_ADJ.CX_ID and should be updated with the value CK_ADJ.CI_ID.
The CK_ADJ table has 1.3 million rows and both the columns have indexes defined. Table definitiuon mentioned below
The CI_ADJ_CHAR table has 14 million rows and will update 1 million rows and has an index on the ADJ_ID column but not on the CHAR_VAL_FK1 column.
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Mar 28, 2011
I huge table with million of rows and no of column more than 300.. is it possible to keep this table in some memory where oracle can access it fast as compare to disk memory.
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Dec 13, 2011
how to update the middle of plenty rows in the middle of the columns
sample_data
id name state REGION LOC
1 v A.p 1 1
2 a
3 g K.A 0 3
4 y
5 i T.N 1 0
6 l M.P 0 1
7 c U.P
This is sample data,and i have this kind of large data and i need to fill the rows which are empty. In three columns state,region,loc with data like 0,web_intimation,1,
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Apr 29, 2011
have a performance problem with a simple query, for example:
SELECT *
FROM CA_ADDRESS
WHERE address_k1 = 'L163'
I have an index created in column address_k1. CA_ADDRESS is a 3-4 Million Record table.
I need to improve the performance of the query. How I can improve it?
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Oct 5, 2010
Due to some business requirements a table field needs to change from date to timestamp in order to handle the millisecs.
1>When i alter the row , for a table with 150 million recs will there be a conversion. Is there a recommended way to convert the field. Mind you this field is used as a part of composite PK.
2> There is a interfacing application which connects and copies the data to its system and is using the date type, will that application be able to continue to work without any changes, if it does not care about the millisecs.
3> Will there be performance impact on an existing application that uses the date field to sort
4> Will DB need more space due to the change
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Sep 21, 2012
Lets take the basic emp table for our Referenece and lets assume that it contains around 60000 Records and all the deptno in that table are Initially 10. Please provide an update statement which would update deptno column of EMP table((based on) order by EMPNO) in for every 120 records incrementing by 1.(DeptNo to be incremented by 1,like 10 ,11 , 12 etc).
First 120 Records deptno should be 10,
Next 120 Records deptno should be 11, and so on.
.
.
.
.
.
.
For Last 120 records deptno should be updated with 500.
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Sep 16, 2013
what are the type of ways to update the 10 million records table with certain condition?
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Sep 24, 2010
We have to load 10 million rows in a table from another table based on the multiple joins. How much tablespace size we allocate to the table and for performance point of view how much should be the SGA size.
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Aug 22, 2012
what are the collections available in Oracle Plsql, what are concepts of collection.
How to Transpose a Table from rows to columns or columns into rows.
DDL and DML concepts.
What is the concepts of statistics in Oracle Plsql.
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Mar 12, 2013
my need is to perform merge - update when id column is matched, but one of others columns not.When id column is not matched then I perform insert.
It works fine for matched or not matched id column.
Commented code is my try to perform check for others columns, The code should not update when all columns match. It should update only when on of columns doesn't match (except id column of course, because it's key column).
begin
merge into copy.table1 rr
using
(
select
ID ,
DEALID ,
ESTIMATIONDATE ,
BOUNDOVERESTIMATDATE ,
ESTIMATIONTYPEID ,
MARKETAMOUNT ,
LIQUIDATINGAMOUNT ,
[code]....
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Jun 21, 2013
I want to update a table 8 million records of a table which has 10 millions records, what could be the best strategy if the table has a BLOB column with 600GB worth of data. BLOB itself is 550GB. I am not updating the BLOB column. Usually with non-BLOB data i have tried doing "CREATE TABLE new_table as select <do the update "here"> from old_table;" method .
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Nov 16, 2012
I want the output from two tables with rows to columns and generate dynamic basing on the columns.
For example: Table A (a1) , Table B(a1,b1)
Data: A B
------ ----
a1 a1 b1
--- ---- ----
1 1 x
2 1 y
3 2 a
2 b
2 c
o/p: Columnname col_1 col_2 col_3
-----------------------------------------------
a1 b1_1 b1_2 b1_3
----- ---------------------
1 x y
2 a b c
Columns should be generated based on the second table second column.
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Nov 28, 2012
column1 column2 column3 column4
12 Mar-21-2005 BDW blah blah blah
11 Feb-07-2001 ZV ha ha ha
12 Jan-02-2002 YM zuck zuck zuckI want a view that has that data like this:
column1 column2
12 Mar-21-2005 - BDW - blah blah blah; Jan-02-2002 - YM - zuck zuck zuck
11 Feb-07-2001 ZV ha ha haCan you help with SQL ?
I tried to use this Oracle LISTAGG function in the SQL, but got a "string concatenation limit exceeded"
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Jun 11, 2010
We have two tables, TableA and TableB that contain list of accounts and balances.The requirement is to compare the balances of accounts in both the tables, and if there is a difference, then record that difference with account number in another table.
Both TableA and TableB contain more than 10 million rows.What is the best way to do this task in PL/SQL? A join on TableA and TableB to know the differences has become very slow due to large volume.
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Mar 30, 2012
I've a query that sum up data from one table. But I've to convert them into rows.
Summary query result.
COL1 COL2 COL3 COL4
1000 2000 3000 4000
Test Table creation script.
CREATE TABLE TEST_TBL
(
COL1 NUMBER(14,2),
COL2 NUMBER(14,2),
COL3 NUMBER(14,2),
COL4 NUMBER(14,2)
) ;
INSERT INTO TEST_TBL VALUES( 1000, 2000, 3000, 4000 ) ;
Expected result
A1 1000
A2 2000
A3 3000
A4 4000
A1, A2, A3, A4 are hard coded fixed values.
I could have done this but not a good idea in case table TEST_TBL is not a single row table but an inline query on 1,00,00,000 records with summary functions. In my table I've a summary query instead of single row table.
SELECT 'A1', COL1 FROM TEST_TBL
UNION ALL
SELECT 'A2', COL2 FROM TEST_TBL
UNION ALL
SELECT 'A3', COL3 FROM TEST_TBL
UNION ALL
SELECT 'A4', COL4 FROM TEST_TBL
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Feb 6, 2011
I am trying to update columns of Table A with the columns of Table B. Both these tables have 60,000 rows each. I tried this operation using following 2 queries:
Query 1
Update TableA A
set
(A.col1,A.col2,A.col3)=(select B.col1,B.col2,B.col3
from TableB
where A.CODE=B.CODE)
Query 2
Update TableA A
set
(A.col1,A.col2,A.col3)=(select B.col1,B.col2,B.col3
from TableB
where A.CODE=B.CODE)
where exists
A.code = (select B.code
from TableB B
where A.code=B.code)
When i execute these two above queries, it keeps executing indefinitely.
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Apr 24, 2012
How do I convert rows in oracle table to columns by writing a query?
Here is my table.
EID QNo Qual YOP
101 1 B.Tech 2004
101 2 M.Tech 2006
102 1 B.Tech 2003
102 2 M.Tech 2005
102 3 MBA 2007
Now I want the above table in the following format......
EID Qual1 YOP1 Qual2 Yop2 Qual3 Yop3
101 B. Tech 2004 M.Tech 2006
102 B. Tech 2003 M.Tech 2005 MBA 2007
I have maximum of 8 Qualifications, how to achieve this in oracle.
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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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Mar 15, 2010
I have two table and trying to update tableA with data from tableB but gives an error. My TableA has columns - colA,colB,colC,colX and table B has columns - colA,colB,colX. Sample data looks like this:
tableA:
XXYY, local,3/19,48
XXYY,ixc,3/19,24
XXYYlocal,3/20,48
XXYY,local,3/21,48
Table B:
XXYY,local,48
XXYY,ixc,24
PPQQ,local,72
this is the query I wrote
update tableA a
set (a.colX)=(select (b.colX) from tableB b where a.colA=b.colA and a.colB=b.colB);
When i run it gives this error:single row subquery returns more than one row.
tableB has only 1 value for colX for each colA,colB record but tableA has mutiple colA and colB repeated but for all of thsoe in table A i want to update the tableB.colX value for matching colA and colB.
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Apr 26, 2012
I have a table A, whose table structure is in the below format.
Table A
ID DESC VALUE
123 A 454
123 B 1111
123 C 111
123 D 222
124 A 123
124 B 1
124 C 111
124 D 44
Now i need to insert the data from this table to another table B, the sturcture of which is as below
Table B
ID A B C D
1234541111111222
124123111144
How do i frame a query to fetch data from table A and insert that into table B? I don't want to use max and decode combination. as it would return only single row for an ID. I need all the id's to be displayed.
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Aug 25, 2011
I am new to oracle, I have request to build a query,
we have table that generates data from 7am to 20pm for eavery hour it generates 4 rows and has 43 session values as 43 columns.
Now i want to find for every hour which is the hights session value at what time. in one hour it runs four times like 7, 7:15, 7:30 and 7:45 and each row has date, time and 43 session columns in table...
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Mar 11, 2013
I have a Employee table of the following format:
Emp_id | Emp_name | Salary
101 | James | 1000
102 | Julia | 200
I have to convert or transpose the table data as follows using a SQL statement/function -
Emp_id | 101 | 102
Emp_name | James | Julia
Salary | 1000 | 2000
How do I achieve this?
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Dec 5, 2012
I have the situation like i want display the data from table which is storing in rows into a columns....
My table structure will be like this(Here i am taking only one part but have N no. of parts in my system)
Partno Purchase date Qty
111 02-DEC-2012 15
111 03-DEC-2012 25
111 04-DEC-2012 20
*** **** ****
111 31-DEC-2012 28
So i am expecting my query out put should be in column wise, that should make columns dynamically based on dates.
like example
__Partno 01-Dec-12 02-Dec-12 03-Dec-12 04-Dec-12 ---- ---- --- 31-Dec-12__
111 0 15 25 20 28
Here columns should be created based purchase dates dynamically with respect to quantity. Query out put will be like matrix format. So i feel that PIVOT & SYS_CONNECT_BY_PATH will not serve my requirement.
My system comparability is
oracle 10g database.
oracle 6i forms.
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Dec 8, 2010
I have three tables fixtures, fixture_teams and team_tbl
fixtures consists of:
create table Fixture_tbl(
fixt_id varchar2(8),
fixt_date date,
fixt_time varchar2(10),
fixt_location location_t,
umpire_id varchar2(8),
player_of_match player_of_match,
home_team varchar2(20),
away_team varchar2(20),
[code]....
creating a stored procedure that updates the points column in the teams_tbl , the value that is updated in to the points column will be retrieved from the fixture_team table. so if team a has more goals than team b then the points column for team a will be increased by 6 else if the scores are equal they get 4 points each.
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May 31, 2010
I would like to UPDATE the columns p1 and p2 of my table student (studentid:pk,name,p1,p2,...) for a given studentid.and I have a when-button-pressed trigger with this
UPDATE student
SET student.p1=:validation.proj1,
student.p2=:validation.proj2
where UPPER(student.studentid)=UPPER(:validation.studentid);commit_form;
when I run my form with a correct studentid, I got this error: FRM-40508: ORACLE error: UNABLE to INSERT record
but it is cworking correctly in sqlplus; and I have all priveligies.
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Nov 27, 2012
Is there any way to generate columns dynamically by depending on the rows in a table in 11G .
Ex: If the deptno in DEPT table is not constant,then how to generate the N numbers of columns based on the deptno. Below query is working when we hard coded the deptno (10,20,30,40).What else if we more number of departments and we don't know the departments also.
Connected to Oracle Database 11g Enterprise Edition Release 11.2.0.1.0
Connected as dbo
SQL> SELECT *
FROM (SELECT deptno, job, sum(sal) sal
FROM SCOTT.emp GROUP BY job, deptno) PIVOT(sum(sal) FOR deptno IN(10,
20,
30,
40));
[code].....
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May 25, 2013
Lets say I have a table in ORACLE database like:
ACC_ID | ACC_AMT
111 | 10000
111 | 12000
111 | 14000
222 | 25000
222 | 30000
333 | 18000
333 | 27000
333 | 13000
333 | 15000
I want to get the output as:
ACC_ID_1 | ACC_AMT_1 | ACC_ID_2 | ACC_AMT_2 | ACC_ID_3 | ACC_AMT_3
111 | 10000 | 222 | 25000 | 333 | 18000
111 | 12000 | 222 | 30000 | 333 | 27000
111 | 14000 | null | null | 333 | 13000
null | null | null | null | 333 | 15000
I need each different ACC_ID with ACC_AMT in different columns. The table may have other different ACC_ID also, but I will fetch only what I need. What is the best way to do this?
So far I have tried this:
SELECT
(CASE WHEN ACC_ID=111 THEN ACC_ID END) AS ACC_ID_1,
(CASE WHEN ACC_ID=111 THEN ACC_AMT END) AS ACC_AMT_1,
(CASE WHEN ACC_ID=222 THEN ACC_ID END) AS ACC_ID_2,
(CASE WHEN ACC_ID=222 THEN ACC_AMT END) AS ACC_AMT_2,
(CASE WHEN ACC_ID=333 THEN ACC_ID END) AS ACC_ID_3,
(CASE WHEN ACC_ID=333 THEN ACC_AMT END) AS ACC_AMT_3
FROM <TABLE_NAME>
But I am not getting the desired result.
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May 24, 2010
I have this requirement in Oracle FORMS ver 6i where I populate some records in a table in a datablock and display them on the screen. A facility needs to be provided to the end users to select the records randomly by just entering the count of the records in a non-d/b text field. The number entered in the count field will decide how many records are to be selected randomly.
I tried using the query -
UPDATE <table a>
SET <col 1> = <value 1>
WHERE rowid IN (SELECT rowid FROM (SELECT * FROM <table a> ORDER BY DBMS_RANDOM.VALUE)
WHERE <col 2> = <value 2>)
/
which I found on the link [URL] but while compiling, the Form gives a compilation error for the ORDER by clause - i'm sure there's no syntax error in the way I have written it...
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Feb 22, 2011
if a table contains two columns and both are part of the primary key of that table (Kind of obvoius).
should i opt for a index organized tbale in this case ?Or should i opt for another running sequential colum which would serve as a primary key of this table and define the actual two columns of the system as unique keys.
there is a drawback if a most of the tables of a database contain composite primary keys?
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