What are the retrieval sequences in ims db?

900

what are the differences between temporary storage queue (tsq) and transient data quene (tdq)?

797

State the differences between vsam and non-vsam files?

634

Define perform? And its types?

596

What is iseries database?

671

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.

2265

Define clustered index?

655

What is drop table?

661

Can we insert update delete in view?

659

What is with ur in db2?

879

what happens when COND is coded in JOB statement and when COND is coded inside EXEC statement?

882

what is the difference between packed decimal and zoned decimal?

2464

Where do you specify them?

770

How to Build a Row Condition?

1377

How do you differentiate between cobol and cobol-ii?

753