Give a brief description of db2 isolation levels?

0 Answers  

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I am having n number of records in a table which consists of emp-name is one of the field among them. Now i want to change the first letter of every name with capital.

1 Answers   Cap Gemini,

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is there any restrictions for unions ?

4 Answers   Patni,

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How can we retrieve the total number of records in RPG & CLLE?

0 Answers  

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Describe what a storage group(STOGROUP) is?

2 Answers  

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What are foreign keys?

1 Answers  

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What is rct?

0 Answers  

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What are the different methods of accessing db2 from tso? How is the connection established between TSO & DB2?

3 Answers   Tech Mahindra,

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How do you prepare a COBOL + DB2 program from coading till execution ?

1 Answers   Amdocs, Xansa,

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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.

0 Answers  

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How many databases can be created inside an instance in db2 ?

0 Answers   MCN Solutions,

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What is the difference between dbm cfg and db cfg file in db2 ?

0 Answers   MCN Solutions,

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