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 |
Which one allows duplicate values Union or Union All ?
What is a buffer pool?
Suppose there are many duplicate records in a Db2 table. What is the query to retrive only duplicate records?
How to design maps
Do we have any optinon to search part of integer in DB2 as we have for character Like,SUBSTR optins?
What is correlation names?
What techniques will be used to avoid deadlock??
What is buffer pool?
Explain about cursor stability?
What is difference between *omit and *nopass?
How can record locking be achieved in those DB2 versions which do not support it?
What is the physical storage length of the data types: date, time, timestamp in the db2 database?