Answer Posted / ankit

Select substr(firstname,1,5) as firtname from emp;

Which component is responsible for processing sql statements and selecting access paths?

1127

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Is db2 relational database?

979

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What is the default page size of buffer pools?

1122

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What are foreign keys in db2?

1105

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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.

2672

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How do you simulate the explain of an embedded sql statement in spufi/qmf?

1092

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What parameters are used to control the free space in DB2?

1056

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What does db2 blu stand for?

1165

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What does db2 stand for?

1025

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Explain dclgen.

1205

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Define sqlca.

1113

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While unloading huge amount of data from table. Suddenly job failed some error. Imagine 1M data unloading, In that 90% data unloaded only 10% left, So if want to unload the rest 10% what needs to be done? Whether do i need to start from top or anything ?

2331

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What is package in db2 mainframe?

987

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What is the cobol picture clause of the db2 data types date, time, timestamp?

1068

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What is database alias db2?

1127

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