How will fetch last 5 rows from table in db2
Answers were Sorted based on User's Feedback
Answer / sree
SELECT * FROM TABLENAME ORDER BY PRIMARYCOLUMNNAME DESC
FETCH FIRST 5 ROWS ONLY ;
THIS ANSWER IS VALID ONLY IF THERE IS A PRIMARY KEY
COLUMN,OTHERWISE IT WONT WORK
IF THERE IS NO PRIMARY KEY COLUMN IN GIVEN TABLE ,I DON'T
KNOW THE ANSWER
FOR FETCHING FIRST 5 ROWS
SELECT * FROM TABLENAME FETCH FIRST 5 ROWS ONLY;
Is This Answer Correct ? | 8 Yes | 1 No |
Hi Harsha,
There is nothing to do with multiple of 5.
Simply declare the array of occours of 5 keep on filling
it when 6th record comes start over writing it from 1st.
At last we only left with the last 5 fetched rows.
Vaneesh Khurana
Is This Answer Correct ? | 1 Yes | 0 No |
See there is no direct method to do so, but still if we want
last 5 rows only we can create a logic which is as follows.
1. Declare an array to save the fetch rows with occurs of 5.
2. Now fetch the rows and start saving in that array such
that when the count becomes 5 overwrite the 6th fetch in the
first occurs similarly the 7th fetch on the 2nd occur.
3. Now when all the fetching is done the array will contains
the last 5 fetched rows.
Is This Answer Correct ? | 2 Yes | 2 No |
Answer / harsha
Vaneeshh, your logic will not work if number of records are
not in a multiple of 5.
Is This Answer Correct ? | 1 Yes | 1 No |
Answer / mahyn
select * from tablename
order by primary_key desc
fetch first 5 rows only
with ur;
can be one way...
Is This Answer Correct ? | 0 Yes | 0 No |
Answer / mayur bhayani
SELECT * FROM (SELECT * FROM T ORDER BY pk DESC FETCH FIRST 5 ROWS) AS X
ORDER BY PK;
Is This Answer Correct ? | 3 Yes | 11 No |
What is ibm db2 used for?
Is it mandatory to use DCLGEN? If not, why would you use it at all?
how can you copy records present in a flat physical file to a database file(physical file).please explain in rpg400 with a simple example
What is the purpose of the DSNC transaction ?
Explain transactions, commits and rollbacks in DB2.
How do you check for a null value in a db2 column?
For update of a row in cursors, when do we move value into host variable in cobol progrm? is it before open or before fetch ?
How will you delete duplicate records from a table?
DB2: A calls B once sucessfull and second time when it calls says curson is open why is it so?
Why PS file called Physical seqential file?How to sore data in sequential file and ESDS file? What is the use of DBRM,PLAN,package and Collection.
what is the role of the cursor in db2?
Explain about mirror activator disk mirroring?