What is the use of runstats in db2?

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What are common abends

1 Answers   SPIC, Virtusa,

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What is a subselect? Is it different from a nested select?

1 Answers  

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What do you mean by storage group (stogroup)?

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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.

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What is universal database?

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Mention and explain the contention situations caused by locks?

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I have a subprogram B calling from mainprogram A.I have opened a cursor in A ,Can i fetch the same cursor in subprogram B , If yes , Please explain the reason?

1 Answers   HeadStrong,

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What is DCLGEN ?

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Define check constraint.

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What is host variable in db2 cobol?

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What is the difference between base table and view?

7 Answers  

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