Is it possible to precompile if db2 goes down?

4 Answers   Target,

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Why do chiropractors use drop table?

0 Answers  

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What is an EXPLAIN in DB2. How and what is the steps followed in EXPLAIN command. Can all the queries be used in EXPLAIN command to check the performance.

3 Answers   IBM,

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Name some fields from SQLCA

1 Answers  

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What is the cascade rule and how does it relate to deletions made with a subselect?

1 Answers  

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Q3. How will you fetch duplicate values from a DB2 table?

2 Answers   RBS,

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what's the equivalent Cobol Data type for Decimal(x,y) in DB2? what does the current SQLID register contain?

3 Answers   Cap Gemini, Tech Mahindra,

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What is a db2 table?

0 Answers  

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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 would you find out the total number of rows in a db2 table?

0 Answers  

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What are some characteristics of columns that benefit from indexes?

1 Answers  

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How to retrieve rows from a db2 table in embedded sql?

0 Answers  

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