What are the four lockable units for DB2?

1 Answers  

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how can we find nth max salary from A table

5 Answers   IBM,

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Parm value passed is PARM=(10,20). how do code linkage section and how would you add these two passes values and show result in cobol program.

3 Answers   IBM,

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what are stage one indexable predicates?

1 Answers  

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How to view db2 table structure?

0 Answers  

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What is copy book?

1 Answers   Thomson Reuters,

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What is the meaning concurrency in the db2 database?

0 Answers  

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Mention a credible reason why select* is never given preference in an sql program that has been embedded.

0 Answers  

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Hi this is sures. i need to practice the ibm mainframes.could u telme how can i get userid from IBM.how much cost they will collect for one user id.can send me the details please.thanq

2 Answers  

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I have a table(product),It contain fields(productname,cost). I want to retrieve the product name ,which cost is second maximum in the table?

10 Answers   Fidelity,

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What are the various locks available?

5 Answers   CTS,

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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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