What is a bind card?
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What are the isolation levels possible ?
What is lock escalation in db2?
What should be specified along with a cursor in order to continue updating process after commit?
What is cascading rollback?
How do you prepare a COBOL + DB2 program from coading till execution ?
Explain the benefits you can get from mainframe connect?
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 Declaration Generator(DCLGEN)?
What is dbrm? What it contains?
wht are the restrictions for union ?
How does cobol compile db2 program?
How do you filter out the rows retrieved from a Db2 table ?