Interested to Buy Any Domain ? << Click Here >> for more details...
Answer Posted / arivolivarman
yes
| Is This Answer Correct ? | 0 Yes | 1 No |
Post New Answer View All Answers
What are the rules for db2 programming?
What is cursor in dbms?
Which is faster delete or truncate?
What is load replace in db2?
Explain db2.
What is data manager?
What is the difference between drop table and delete table?
How do I delete a table in database?
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.
Outputs of explain are with matchcols = 0. What does this signify?
What is the usage of open cursor command?
What are the prerogatives?
What is rebind in db2?
What is db2?
If the cursor is kept open followed the issuing of commit, what is the procedure to leave the cursor that way?
