What does DSNDB07 database do?

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What is dbrm? When it will be created?

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What is Call attach facility? How does it work?

1 Answers   Syntel,

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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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Is it possible to update a primary key value? If not, what is the error code given? If yes, can more than 1 primary key column be updated at a time?

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How to execute stored procedure in db2 command editor?

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Explain dclgen.

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we can code COPY DCLGEN or INCLUDE DCLGEN, At which stage of the precompilation , dclgen get expanded if we write 1) copy 2) include one question about dclgen.. Is it mandatory to use declare table in dclgen.. I think no...but it will be used by the precompiler to validate the table name,column name etc.., can one clear my doubt ..is it necessary to include declare table or not?

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How many clustering indexes can be defined for a table?

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What is reorg and runstats in db2?

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What type of database is db2?

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What is universal database?

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