What is a buffer in memory?

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I want to fetch the 10th row of a table which has been changed.How can I do it without going thru all the rows.

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What is a buffer pool?

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What does db2 stand for?

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List down the data types in the db2 database.

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What are the three types of page locks that can be held?

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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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How do you find the maximum value in a column in db2?

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db2 maintains information about the data... a.in tables. b.in a set of tables known as db2 catalog. c.in db2 database. d.none of the above.

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What is dbrm? When it will be created?

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difference between group clause and order clause

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What is the maximum size of a char data type in db2?

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