What is declare cursor?

0 Answers  

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How do I delete a table in db2?

0 Answers  

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What does db2 mean?

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.

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5 rows are inserted to a DB2 Table. Next 3 of those are updated, then a rollback is issued. What would happen when the rollback is issued?

2 Answers  

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Suppose we have a query for update update table1 set col1 = 'val1' where col2=(select .... from ...) suppose the subquery does not return any record, what will happen to update?

1 Answers   IBM,

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can we drop column from a table

7 Answers   INDUS,

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How to get the ddl of a table in db2?

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What is buffer pool?

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What are the functions of Bind?

2 Answers   Amdocs, IBM,

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What's the maximum number of characters that a tablename can have?

3 Answers  

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what's the best lock size that you could use when you create a tablespace?

2 Answers   IBM,

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