what's the error code for Unique Index Violation?

2 Answers  

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What are union and union all?

0 Answers  

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What will the FREE command do to a plan?

2 Answers  

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if there is a table with huge number of records and if i want to extract only first 3 records from the table, what query i have to provide to retreive first 3 records

4 Answers   UST,

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What is subquery ?

6 Answers  

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how can you copy records present in a flat physical file to a database file(physical file).please explain in rpg400 with a simple example

1 Answers   CTS,

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Is db2 free?

0 Answers  

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Hello All, We have requirment to Replace BMC Db2 Load product thru CA FAST LOADPlus product. Do anyone have JCL to for FAST LOADPLUS and what all are thing need to take in consideration.

0 Answers   IBM,

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What is a NULL value? What are the pros and cons of using NULLS?

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 is the use of commit ? and what is the syntax?

2 Answers   Deloitte,

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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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