Interested to Buy Any Domain ? << Click Here >> for more details...
Q4. How will you get the count of record without using COUNT verb in query?
- 2 Answers
- 12691 Views
- IBM, I also Faced
- E-Mail Answers
Answer Posted / ganesh
select row_number()over() from table_name
| Is This Answer Correct ? | 8 Yes | 5 No |
Post New Answer View All Answers
My sql statement select avg(salary) from emp yields inaccurate results. Why?
How does a cursor work?
Explain about rct in db2?
What is the max length of sqlca?
Discuss about db2 bind?
What is package in db2 mainframe?
What is performance tuning db2?
what is the role of the cursor in db2?
Are view updateable?
Where do you specify them?
What is the difference between plan and package in db2?
SET is the ANSI standard for variable assignment, SELECT is not. SET can only assign one variable at a time, SELECT can make multiple assignments at once. If assigning from a query, SET can only assign a scalar value. If the query returns multiple values/rows then SET will raise an error. SELECT will assign one of the values to the variable and hide the fact that multiple values were returned (so you'd likely never know why something was going wrong elsewhere - have fun troubleshooting that one) When assigning from a query if there is no value returned then SET will assign NULL, where SELECT will not make the assignment at all (so the variable will not be changed from it's previous value) As far as speed differences - there are no direct differences between SET and SELECT. However SELECT's ability to make multiple assignments in one shot does give it a slight speed advantage over SET.
When do you specify the isolation level?
What is sqlca?
How do we specify index to include or not during bind process.
