What is the role of union all and union
On which levels locks can be applied?
What parameters are used to control the free space in DB2?
What is the use of predicate?
What is cursor stability in db2?
Is ibm db2 free?
What is a Foreign Key?
Define db2.
How do I copy a table in db2?
Why do we need reorg in db2?
How to execute stored procedures?
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.
What is the use of dclgen in db2?
What are bind parameters in db2?
Explain about open switch business continuity software?
