SQL & PL/SQL :: Delete Duplicate Records
Sep 29, 2010
say I have duplicate records in TABLE3, can I use following SQL to delete the duplicates?FYI, BUS_FID is unique number column.
TABLE3
------------------------
ori_id*************id***********r_f_a****r_t_a*******bus_id
72840000040572*****740040572****255******267*********1
72840000040572*****740040572****255******267*********2
2840000040572******20040572*****25*******27**********3
7840000040572******70040572*****2********6***********4
DELETE FROM TABLE3 WHERE BUS_ID NOT IN (SELECT MIN(BUS_ID) FROM TABLE3 GROUP BY ORI_ID);
consider TABLE3 has millions of millions of data, say 40 millions.Update, I have tried it and it is very slow...
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Apr 13, 2011
I need to delete duplicate records from a table (indeed they are multiple duplicates).
Table Data
IDGroupQty
1KK30
1KK0
1KK19
2AA0
2AA30
3AA0
3AA30
3AA30
3AA9
My aim is to delete duplicates out of above data, with the below condtions.
1) first record with value 30 and then with value 0.
2) if there are 3 duplicate records ex: ID is 1 and Group KK, then i have to delete both 30 & 0 qty records.
3) If there are more than 3 duplicate records ex: ID is 3 and Group is AA, the i have to delete all the records with qty value either 30 or 0 and.
I have written a query like below.
SELECT id,
unit,
RANK ()
OVER (PARTITION BY id, unit
ORDER BY id, unit)
num
FROM temp;
with the above query, i am unable to mark this dynamic duplications.
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Aug 30, 2010
How can i delete duplicate records from the table.
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Apr 7, 2012
I want to delete the duplicate records from a table without using Below 2 methods:
1> delete from table_1 a where row_id not in (select min(row_id) from Table_1 b where a.PK=b.PK);
2> Insert into Table_2 select distinct * from Table_1;
Drop table Table_1;
Rename Table_2 to Table_1;
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Dec 22, 2012
how to delete duplicated records from a table without using row_id. I found the duplicated rows from a table using Analytical Function. But i could not use the Analytical function in the where condition.
My table(tab2) Structure is
DEPTNODEPT_NAMEEMPIDSEXID1
107jadf 1F1
40asdf 55
10purchase 2M2
10sales 3M3
30HR 4F4
I found the Duplicate Record by using the query
with a as
(select deptno,dept_name,empid,sex,id1,row_number()over(partition by deptno order by deptno) rnum from tab2)
select * from a where rnum >1
how to delete duplicate record .
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Oct 9, 2012
I have to write a procedure that accepts schema name, table name and column value as parameters....I knew that i need to use metadata to do that deleting manually.
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Feb 21, 2011
I have written the following PL/SQL procedure to delete the records and count the number of records has been deleted.
CREATE OR REPLACE PROCEDURE Del_emp IS
del_records NUMBER:=0;
BEGIN
DELETE
FROM candidate c
WHERE empid in
(select c.empid
from employee e,
candidate c
where e.empid = c.empid
and e.emp_stat = 'TERMINATED'
);
[code]....
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Feb 6, 2011
I having a problem with duplicate rows with a query.
What I have so far is
SELECT D.Student_Id,
E.Latest_Reg_Date,
E.Attendance_Count,
[Code].....
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Apr 8, 2012
I have a requirement to delete duplicate records. For example,if the below query retrieves count of duplicate records along with the column values.
select col2,col3,col4,col5,col6,col7,count(*) from table
group by
col2,col3,col4,col5,col6,col7
having count(*) > 1;
I would like to retain only one record with max(col1) which is a surrogate key and other records should be deleted.How to retain one record in a duplicate record set based on max of certain column.
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Sep 8, 2008
In oracle 9i ........How to delete duplicate entries in a table ?
if suppose in a table named office, one or more entry(row) is repeated more then twice or minimum twice.
I need a query to delete the multiple entries ....
Note:
--->No constraints applied on the table.
--->No Primary Key
--->You cannot create any object....that is no view or a duplicate table can be created
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May 12, 2011
I have written this below code. The logic behind the code is, Delete the duplicate record from a table, and delete those record from other 7 table based on the SL_NUMBER.
But Problem is After delete the duplicate record When I have use Below statement
RETURNING SL_NUMBER BULK COLLECT INTO rec_sl_number;
This statement unable to return approx 40 Lakhs SL_NUMBER
DECLARE
rec_sl_number dbms_sql.number_table;
BEGIN
[Code]....
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Aug 22, 2012
I have a table like this
table:
id name plan code
1 sam normal 5
1 sam normal 6
1 sam special 5
1 sam Special 6
I need to delete data in such a way that one entry with normal and one entry with special plan should remain and should be with different code. Does not matter whether normal stays with 5 or 6 code.
I tried with rowid but it deletes either both normal or both special or returns same code for normal and special.
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Mar 1, 2010
I want to delete the duplicate rows in a table without using ROWID.
I have the following data.
SNO SNAME SECTION
1 RAM A
2 SHYAM B
2 SHYAM B
3 KISHOR C
3 KISHOR D
4 RAMESH E
5 RAJESH F
5 RAJESH F
The Output Should be like this.
SNO SNAME SECTION
1 RAM A
2 SHYAM B
3 KISHOR C
3 KISHOR D
4 RAMESH E
5 RAJESH F
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Nov 19, 2010
how i can chk & delete duplicate rows from a table
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Jul 29, 2013
Created three tables and group by 3 tables column name. want to delete duplicate record without first table(test). Delete the duplicate record in test1 and test2 except test.
SELECT a as Name,b as M_Name, c as L_Name, count(*) FROM ( SELECT first_name as a, middle_name as b, last_name as c FROM test UNION ALL SELECT first_name as a, middle_name as b, last_name as c FROM test1 UNION ALL SELECT first_name as a, middle_name as b, last_name as c FROM test2 ) as countGROUP BY a,b,cHAVING count(*) > 1
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Dec 22, 2010
i am using this query to see only duplicate records but not able to get through
select * from
emp
where rowid NOT IN
( select max(rowid) from emp GROUP BY job_id)
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May 20, 2010
i have table with name, count, flag with dublicate records
example
with swayam name , counts are 3, 4
with ramana name, counts are 5,5
with reddy name, counts are 1,2,3
i want to update the flag
if count are same then update one of record (flag='A') and other should be flag='R'
if count are different then update the max count (flag='A') and other should be reject remaing (flag='R'). use below quires
CREATE TABLE TEST_DUB ( NAME VARCHAR2(99), V_COUNT NUMBER, FLAG VARCHAR2(1));
Insert into TEST_DUB (NAME, V_COUNT)
Values
('SWAYAM', 3);
Insert into TEST_DUB
(NAME, V_COUNT)
Values
[Code]....
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Jun 22, 2010
My duplicate records have been detected by First Name, Last Name, Name, and City.
such as
select FirstName, LastName, Name, City, count(*) as Num of Duplicate from TABLE
GROUP BY FirstName, LastName, Name, City
having count (*) > 1
It gives the duplicate record. Now I need all the columns and the each duplicate record in the select, so I can see why these records are duplicate.
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Dec 20, 2012
I have a table and it's having duplicate records.
for one particular employee, he is having multiple records with the same data in the table
EMPNO ENAME JOB SAL DOB
-------------------------------------------------------
1 A X 100 1956
2 B Y 200 1974
1 A X 100 1956
3 C Z 300 1920
[Code]....
like this am having multiple times the duplicates.
I have written the below query to delete the duplicate records. But it is deleting only one record (if we have 5 duplicates it is deleting only 1 ). But I am looking to delete if we have 5 duplicates need to delete 4 duplicates and keep 1 record in the table.
query which am using to delete the duplicates is
DELETE FROM Table1 a
WHERE ROWID IN (SELECT MAX(ROWID)
FROM Table2 b
WHERE a.ID = b.ID);
it is deleting only one row but I want to delete 4 records out of 5 and keep one record.
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Dec 16, 2010
I am trying to write SQL which finds records which are duplicated in more than one column.
Requirement : When ever i have duplicates in Col2 and Col3 both i need that record...
My Source table:
COL1COL2COL3COL4
163kg87
263fh87
1ab23
2ab24
3cd98
4fg87
5xy77
6xy67
Desired Output
COL1COL2COL3COL4
1ab23
2ab24
5xy77
6xy67
For Table generation
CREATE TABLE TEMP_TEST
(
COL1 NUMBER,
COL2 VARCHAR2(10 BYTE),
COL3 VARCHAR2(10 BYTE),
COL4 NUMBER
)
Insert statements
Insert into TEMP_TEST
(COL1, COL2, COL3, COL4)
Values
(163, 'k', 'g', 87);
Insert into TEMP_TEST
(COL1, COL2, COL3, COL4)
Values
[code]....
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Sep 20, 2011
The requirement is I have a table (TAB1), wherein I have 3 columns, ID, LID and STATUS.
The value in ID column = ID_SEQ.NEXTVAL,and LID will be either 0 or 1 and the possible values for STATUS are 'ED','CP', NULL. The ID column is not suppose to have duplicate values, but there is no check on the table for the same.
Someone has updated the existing data and ID column is containing duplicate values. Wherever LID = 0 and STATUS = NULL and if only if ID is duplicated then the ID_SEQ.NEXTVAL has to be assigned to ID field, so that there are no more duplicate values.
CREATE TABLE tab1 (id NUMBER , lid NUMBER, status VARCHAR2(10));
Existing Data
------------------
INSERT INTO tab1 VALUES (1,0, 'ED');
INSERT INTO tab1 VALUES (1,0, 'CP');
INSERT INTO tab1 VALUES (1,0, NULL);
INSERT INTO tab1 VALUES (1,0, NULL);
INSERT INTO tab1 VALUES (1,0, NULL);
INSERT INTO tab1 VALUES (1,0, NULL);
[code]....
get the result using a single update statement.
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Aug 30, 2012
I have the following table :
CREATE TABLE A_TEST (A INTEGER, B INTEGER, C INTEGER, D INTEGER, FLAG CHAR(11));
INSERT INTO A_TEST (A,B,C,D) VALUES(1,2,3,4);
INSERT INTO A_TEST (A,B,C,D) VALUES(2,4,5,8);
INSERT INTO A_TEST (A,B,C,D) VALUES(1,2,3,4);
INSERT INTO A_TEST (A,B,C,D) VALUES(2,4,5,8);
INSERT INTO A_TEST (A,B,C,D) VALUES(7,2,3,4);
INSERT INTO A_TEST (A,B,C,D) VALUES(9,2,3,4);
[code]....
I would like to perform an update on the FLAG column by setting to "D" if it is a duplicate record.1,2,3,4);I would like to use the rank function.
Desired update:
A B C D FLAG
1 2 3 4
2 4 5 8
1 2 3 4 D
2 4 5 8 D
7 2 3 4
9 2 3 4
7 2 3 4 D
1 2 3 4 D
5 4 5 8
2 2 3 9
2 4 5 8
6 2 3 4
1 3 3 4
8 2 8 4
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Nov 16, 2011
how to display the data which is shown below without duplicate records in compid and compname and all policy_id's should be there while excuting this query iam getting this data.
select distinct comp_id as compid,
comp_disp_name as company,
plcy_id as policyid,
[Code]....
output
-----------------
compid compname policy_id policy_name
19734 Save the Children 9013 GPA
19734 Save the Children 9012 GMC
20097 JMT 9486 GTL
10890 Steelco Gujarat Ltd. 9727 CAR
17330 Golden Jubilee Hotels Limited 8915 CGL
23117 NBHC 9093 GMC
17542 Heinz India 10693 Fire
19821 KSK Fabricators 10341 D&O
3769 Jones Lang Lasalle India 9199 WC
19821 KSK Fabricators 10340 WC
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Jul 18, 2011
there is non database data block of table type.
now i want restrict user that he will not enter same number again.
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Jun 15, 2012
query to count the duplicate records and to display duplicate records in a table. Iam using oracle 10g.
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Nov 11, 2010
I have a query which pulls data from emp view
select am_obj_emp_obj(empno,ename,sal,deptno,service) from
(select empno,ename,sal,deptno ,service from emp_vw where 1=1 and rownum < 2000 and service in ('MAN','SACH','SACL','KACL'))
WHERE SAL = (SELECT MAX(SAL) FROM EMPS_VW WHERE DEPTNO = deptno or sal is null)
union all
[code]...
This query is pulling 12 records of which 6 records are coming from the first query and the same 6 records is coming from the second query after union all Here am_obj_emp_obj is the object type and emp_vw is the view
Now I wanted to remove the duplicate records.When I implement the union operater it is giving me error.
ORA-22950: cannot ORDER objects without MAP or ORDER method.
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Aug 30, 2012
I have the following table :
CREATE TABLE A_TEST (A INTEGER, B INTEGER, C INTEGER, D INTEGER, FLAG CHAR(11));
INSERT INTO A_TEST (A,B,C,D) VALUES(1,2,3,4);
INSERT INTO A_TEST (A,B,C,D) VALUES(2,4,5,8);
INSERT INTO A_TEST (A,B,C,D) VALUES(1,2,3,4);
INSERT INTO A_TEST (A,B,C,D) VALUES(2,4,5,8);
[code].......
I would like to perform an update on the FLAG column by setting to "D" if it is a duplicate record.1,2,3,4);
I would like to use the rank function.
Desired update:
A B C D FLAG
1 2 3 4
2 4 5 8
1 2 3 4 D
2 4 5 8 D
7 2 3 4
9 2 3 4
7 2 3 4 D
1 2 3 4 D
5 4 5 8
2 2 3 9
2 4 5 8
6 2 3 4
1 3 3 4
8 2 8 4
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Sep 29, 2011
How can I delete the duplicate combination of records from the below table.
CREATE TABLE test
(
gidNUMBER(10),
pidNUMBER(10)
);
INSERT INTO test VALUES (10,20);
INSERT INTO test VALUES (20,10);
INSERT INTO test VALUES (25,46);
[code]....
The condition is if GID = PID and PID = GID then only one combination of these records should be retained. For example Out of 10-20 and 20-10 only one record should be retained.
Expected result after deletion
GID PID
---------- ----------
10 20
25 46
89 64
15 16
19 26
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Jul 12, 2006
I have two identical tables with same structure and have some duplicates between those two. Finally I want to combine togather and in a single table and knockout the duplicates.
SQL how can we do this in a simple way? each tables has around millions records.
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Mar 5, 2011
I've got a table with XML code (CLOB column) and I need to read and write every of parameter(blue marked below) and value (red marked below) record from that.
For example:
create table tmp_mape
(msisdn varchar2(100),
xml_params CLOB )
insert into tmp_mape values
('423903200200',
'<parameters xmlns="http://datalan.sk/webreporting/params/v1_0"><parameter name="id"><value>410</value></parameter><parameter name="isDropped"><value>true</value></parameter></parameters>' );
[code]........
I tried to read this every values of xml code by select below:
select
extractValue(value(x),'/parameter/@name', 'xmlns="http://datalan.sk/webreporting/params/v1_0"') b,
extractValue(value(x),'/parameter/value', 'xmlns="http://datalan.sk/webreporting/params/v1_0"') a,
a.*
[code]......
This select returns a duplicate records because of more the one parameter and value records from XML column.
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