How to compare two rows in PL/SQL?

Hi All,
How to compare two rows in PL/SQL? Is there any method that I can use instead of comparing them column by column?
Any feedback would be highly appreciated.

PhoenixBai wrote:
Hi All,
How to compare two rows in PL/SQL? Is there any method that I can use instead of comparing them column by column?What "rows" are you referring to?
If you're talking of rows within a PL/SQL associative array there are techniques as described in the documentation... e.g.
SQL> ed
Wrote file afiedt.buf
1 declare
2    type v1 is table of number;
3    r1 v1 := v1(1,2,4);
4    r2 v1 := v1(1,2,3);
5 begin
6    if r1 MULTISET EXCEPT DISTINCT r2 = v1() then
7      dbms_output.put_line('Same');
8    else
9      dbms_output.put_line('Different');
10    end if;
11* end;
SQL> /
Different
PL/SQL procedure successfully completed.
SQL> ed
Wrote file afiedt.buf
1 declare
2    type v1 is table of number;
3    r1 v1 := v1(1,2,3);
4    r2 v1 := v1(1,2,3);
5 begin
6    if r1 MULTISET EXCEPT DISTINCT r2 = v1() then
7      dbms_output.put_line('Same');
8    else
9      dbms_output.put_line('Different');
10    end if;
11* end;
SQL> /
Same
PL/SQL procedure successfully completed.
SQL>If you're talking about rows on a table then you can use the MINUS set operator to find the rows that differ between two sets of data...
SQL> select * from emp;
     EMPNO ENAME      JOB              MGR HIREDATE                    SAL       COMM     DEPTNO
      7369 SMITH      CLERK           7902 17-DEC-1980 00:00:00        800                    20
      7499 ALLEN      SALESMAN        7698 20-FEB-1981 00:00:00       1600        300         30
      7521 WARD       SALESMAN        7698 22-FEB-1981 00:00:00       1250        500         30
      7566 JONES      MANAGER         7839 02-APR-1981 00:00:00       2975                    20
      7654 MARTIN     SALESMAN        7698 28-SEP-1981 00:00:00       1250       1400         30
      7698 BLAKE      MANAGER         7839 01-MAY-1981 00:00:00       2850                    30
      7782 CLARK      MANAGER         7839 09-JUN-1981 00:00:00       2450                    10
      7788 SCOTT      ANALYST         7566 19-APR-1987 00:00:00       3000                    20
      7839 KING       PRESIDENT            17-NOV-1981 00:00:00       5000                    10
      7844 TURNER     SALESMAN        7698 08-SEP-1981 00:00:00       1500          0         30
      7876 ADAMS      CLERK           7788 23-MAY-1987 00:00:00       1100                    20
      7900 JAMES      CLERK           7698 03-DEC-1981 00:00:00        950                    30
      7902 FORD       ANALYST         7566 03-DEC-1981 00:00:00       3000                    20
      7934 MILLER     CLERK           7782 23-JAN-1982 00:00:00       1300                    10
14 rows selected.
SQL> select * from emp2;
     EMPNO ENAME      JOB              MGR HIREDATE                    SAL       COMM     DEPTNO
      7521 WARD       SALESMAN        7698 22-FEB-1981 00:00:00       1250        500         30
      7566 JONES      MANAGER         7839 02-APR-1981 00:00:00       2975                    20
      7782 CLARK      MANAGER         7839 09-JUN-1981 00:00:00       2450                    10
      7788 SCOTT      ANALYST         7566 19-APR-1987 00:00:00       3000                    20
      7839 KING       PRESIDENT            17-NOV-1981 00:00:00       5000                    10
      7900 JAMES      CLERK           7698 03-DEC-1981 00:00:00        950                    30
      7934 MILLER     CLERK           7782 23-JAN-1982 00:00:00       1300                    10
7 rows selected.
SQL> select * from emp
2 minus
3 select * from emp2;
     EMPNO ENAME      JOB              MGR HIREDATE                    SAL       COMM     DEPTNO
      7369 SMITH      CLERK           7902 17-DEC-1980 00:00:00        800                    20
      7499 ALLEN      SALESMAN        7698 20-FEB-1981 00:00:00       1600        300         30
      7654 MARTIN     SALESMAN        7698 28-SEP-1981 00:00:00       1250       1400         30
      7698 BLAKE      MANAGER         7839 01-MAY-1981 00:00:00       2850                    30
      7844 TURNER     SALESMAN        7698 08-SEP-1981 00:00:00       1500          0         30
      7876 ADAMS      CLERK           7788 23-MAY-1987 00:00:00       1100                    20
      7902 FORD       ANALYST         7566 03-DEC-1981 00:00:00       3000                    20
7 rows selected.If you actually need to know what columns data is different on "non-matching" rows (based on your primary key) then you'll have to compare column by column.

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Hello,
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For example: The latest version is held in tbl_store, however the tbl_store_audit may hold 5 records which are the past records used before changes were made - these are seen as revisions.
I want to be able to compare what has changed between each revision in the tbl_store_audit table. For example: Out of the 10 columns, the change between revision 1 and revision 2 was the size from XL to XXL. The change between revision 3 and revision 4 was the size XS to M and price 4.99 to 10.99, and so on.
Eventually i will create an APEX report that will show the user the revision number and what was changed from and to.
I seen in a previous post i need to note my oracle version: Oracle version 10.2.0.4.0

Hi,
Like suggested already you should give some sample data and output.
Maybe you would like to have something like this:
-- Sample data
-- Note PK is the primairy key of the source table and rev are the revisions
with tbl_store_audit as
select 1 pk, 1 rev , 1 price , 'XXL' unit_size from dual union all
select 1 pk, 2 rev , 1 price,   'XL' unit_size from dual union all
select 1 pk, 3 rev , 1.4 price, 'XXL' unit_size from dual union all
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select 2 pk, 2 rev , 1.4 price, 'XL' unit_size from dual union all
select 2 pk, 3 rev , 1.4 price, 'XL' unit_size from dual union all
select 1 pk, 4 rev , 1 price , 'XL' unit_size from dual union all
select 1 pk, 5 rev , 1 price , 'XL' unit_size from dual union all
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-- end of sample data
,tbl_store_audit_tmp as
select
pk
,rev
,'PRICE'          field_name
,to_char(price)   field_value
,to_char(lag(price,1) over (partition by pk order by rev) ) old_field_value
from
tbl_store_audit
union all
select
pk
,rev
,'UNIT_SIZE'           field_name
,to_char(UNIT_SIZE)    field_value
,to_char(lag(UNIT_SIZE,1) over (partition by pk order by rev) ) old_field_value
from
tbl_store_audit
-- include all other fields from the table here with it's own union all select ...
select
from
tbl_store_audit_tmp
where
field_value != old_field_value
PK REV FIELD_NAME FIELD_VALUE                              OLD_FIELD_VALUE
1   3 PRICE      1.4                                      1
1   4 PRICE      1                                        1.4
1   2 UNIT_SIZE XL                                       XXL
1   3 UNIT_SIZE XXL                                      XL
1   4 UNIT_SIZE XL                                       XXL
3   2 UNIT_SIZE XXL                                      XL
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Regards,
Peter
Edited by: Peter vd Zwan on Aug 16, 2012 8:25 AM

How to compare two rows from two table with different data

how to compare two rows from two table with different data
e.g.
Table 1
ID   DESC
1     aaa
2     bbb
3     ccc
Table 2
ID   DESC
1     aaa
2     xxx
3     ccc
Result
2

Create
table tab1(ID
int ,DE char(10))
Create
table tab2(ID
int ,DE char(10))
Insert
into tab1 Values
(1,'aaa')
Insert
into tab1 Values
(2,'bbb')
Insert
into tab1 Values(3,'ccc')
Insert
into tab1 Values(4,'dfe')
Insert
into tab2 Values
(1,'aaa')
Insert
into tab2 Values
(2,'xx')
Insert
into tab2 Values(3,'ccc')
Insert
into tab2 Values(6,'wdr')
SELECT
tab1.ID,tab2.ID
As T2 from tab1
FULL
join tab2 on tab1.ID
= tab2.ID
WHERE
BINARY_CHECKSUM(tab1.ID,tab1.DE)
<> BINARY_CHECKSUM(tab2.ID,tab2.DE)
OR tab1.ID
IS NULL
OR
tab2.ID IS
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Apart from different record,Above query populate missing record in both tables.
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ID ID
2 2
4 NULL
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ganeshk

How to Compare two strings in PL/SQL

Hi All,
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Yes, the = sign.
Are you after something like:
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ELSE
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Edited by: Boneist on 27-Aug-2009 11:41

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Hello,
I need to compare both the data and schemas details (columns etc) between two schemas on different databases (connections).
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Thanks.

In SQL Developer go to Tools -> Schema Diff !
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Comparing two rows field by field through a loop

Hi all,
I've got a tricky issue:
There are two tables (almost) identically designed;
In the first one there are lets say some new data and in the 2nd one there is data to be hold & adjusted;
I built up a third table, which contains the meta informations about the two other tables (i.e. it describes the tables, so for each field of these tables, there is the field name, field type, primary key marker, etc.);
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Even the selection of a pair of rows from the two tables should be parameterized, 'cause the primary keys are of course different in the 120 table pairs.
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Hi Peter,
I am very far from being an expert in Oracle but, everything I've read so far strongly suggests that PL/SQL is often the fastest among the customized solutions (beating even compiled C code). The reason - from what I've understood - is that PL/SQL is part of the Oracle kernel/engine, other languages simply aren't.
I suggest you do your own research to confirm what I've just said above.
On a completely different note, when I first read your post, I started writing a reply and decided to discard it because, I figured you probably would find it too far off your original thoughts. However, then you wrote:
>
There are some reasons to prevent hard coding, but it may be possible to generate the PL/SQL-code for each pair of tables by an external program.
>
This is exactly what I was mentioning in the post I ended up discarding. The basic step by step process I was going to mention is as follows:
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STEP 2: turn the working code of step 1 into a template (usually replacing table names, columns, etc by some token that would not be a valid name).
STEP 3: generate a list of the tables and their corresponding columns you need to process. This list may need to be massaged a little to become the generating seed of 120 programs (or so based on what you've said).
STEP 4: if you don't know Perl or AWK then (don't be alarmed...) download AWK (not Perl) and learn it... you can learn the thing in a couple days (maybe even less). It is a very simple and straightforward text processing language, I know non progammers that learned enough in one day to do useful things with it. Using AWK you can easily generate the 120 programs you need from a working template in very little time (a few hours after you've become proficient). By the way, there is AWK, GAWK, NAWK, all pretty much the same thing and all free. The standard manual for AWK is the one written by the authors Aho, Weinberger and Kernigan, about 100 small pages, it's an easy read and no programmer should be without it :) (better than American Express!)
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Compare two rows in same table

Hi,
I want to compare two rows (some columns) in the same table, and if the data in the data columns is different, I want to pick the latest one. The table is date tracked. For instance I have an address table with different addresses for an employee with effective date. I want to be able to pick the latest row if the postal code is different for the 2 rows. Is this possible in sql. I can do this in Pl/sql, but dont want to use it. Eg
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Welcome to the forum!
Whenever you post please provide your 4 digit Oracle version (result of SELECT * FROM V$VERSION).
>
The table is date tracked. For instance I have an address table with different addresses for an employee with effective date. I want to be able to pick the latest row if the postal code is different for the 2 rows.
>
Your question is a little confusing because you are using terms like 'date tracked' and 'effective date' without explaining exactly what your definitions of those terms is.
Why do you want the latest record ONLY if the postal code is different? What if the address is different? Then which record do you want?
Why not just take the record for each person/company that has the latest date? If the data is the same then it doesn't which record you get so the one with the latest date will do. And if the data is different taking the one with the latest date gives you the latest data.
The classic definition of effective date is 'the date the information becomes effective'. Information with a given effective date is NOT in effect before that date and is SUPERCEDED when data is entered with a later effective date if the actual date is later than or equal to the effective date. Using your data
>
123, pn123,1,12-JAN-01
124,pu124,1,13-JAN-01
>
The first record IS NOT effective for dates prior to 12-JAN-01. In fact for a query looking for data prior to that date there isn't any data.
The first record is also NOT effective for dates on or after 13-JAN-01. Only the second record is effective.
If you added a record for 14-JAN-01 this record would not be effective until on or after that date (i.e. not for another 4 1/2 months).
So for the classic definition of effective date the query needs to provide the AS OF date to use to obtain the data. If, as in your system, you are not allowed to create records with dates in the future and you just want the latest record then you can just select the record with the MAX(myDate) value for the given person_id, address_id or whatever your key values are.
Edited by: rp0428 on Aug 11, 2012 7:50 AM

Compare two rows in a same table

Dear all
I need to compare two rows in the same table, I dont know hoe to do it in pl/sql. Some one please help me on this.
example:
tr br price
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xya0003 ama6 14
xya0004 ama7 16
in the table tr is a unique value for each row, I need to compare price column and see whether the first value is less or greater than the next value and, if it is greater put the corresponding br value to a variable and if it is smaller put the corresponding br value to another variable. I dont know a method to do it, as I'm new to pl/sql. Some one please help me in this

not sure what you intend to do as you have mentioned that "TR" is unique and you just want to compare each record with just the next record. Hope below query helps. The value "G" or "L" in flag would indicate if the current records price is greater than or less than the price in next record.
select tr,br,price,col4, case when price> col4 then 'G' when price< col4 then 'L' end flag from (
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Or simply apply an oracle text index on your pdf column:
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Oracle® Database
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g
Release 1 (11.1) for Linux
B32001-04
November 2007
This document contains important information that was not included in the
platform-specific or product-specific documentation
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That is really a good piece of information.
Does it really matter where we are comparing from?
i will explain,let us say we have DEV and TST environment.
let us say both has same project name and the same number of objects but inside the object they may be different(like number of fields in the same record in both environments).
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How to compare two files in java & uncommon text should print in text file.

Hi,
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Hi All,
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How to compare two files in Java & uncommon text should print in Diff text

Hi All,
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Hi All,
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OPENROWSET (Transact-SQL)
Using the OPENROWSET function in SQL Server
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How to Compare two Dates in java

How to Compare two Date Field after getting the values from jTextField1.getText() and jTextField2.getText().

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Post Author: Shrikant
CA Forum: Administration
Hi.. all I want to compare two universes of different data mart to check the table structure. Can anybody please tell me how to compare two Universes of different Datamarts?How i can achive this usinig BusinessObjects Enterprise XI Release 2 ??
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Shrikant

Create
table tab1(ID
int ,DE char(10))
Create
table tab2(ID
int ,DE char(10))
Insert
into tab1 Values
(1,'aaa')
Insert
into tab1 Values
(2,'bbb')
Insert
into tab1 Values(3,'ccc')
Insert
into tab1 Values(4,'dfe')
Insert
into tab2 Values
(1,'aaa')
Insert
into tab2 Values
(2,'xx')
Insert
into tab2 Values(3,'ccc')
Insert
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SELECT
tab1.ID,tab2.ID
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FULL
join tab2 on tab1.ID
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WHERE
BINARY_CHECKSUM(tab1.ID,tab1.DE)
<> BINARY_CHECKSUM(tab2.ID,tab2.DE)
OR tab1.ID
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tab2.ID IS
NULL
ID column considered as a primary Key
Apart from different record,Above query populate missing record in both tables.
Result Set
ID ID
2 2
4 NULL
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How to compare two rows in PL/SQL?

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