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Answer Posted / lu
Before to insert, it's better to select(retrieve),test
sqlcode when 100 insert when 00 update whenever send
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What is a page in db2?
What is explain in db2?
What is difference between alias and synonym in db2?
Following a db2 update statement, what is the quickest way to compute the total number of updated rows?
Which components manage deadlocks in db2?
What is blu acceleration in db2?
Give the name of some fields form sqlca.
How does cobol compile db2 program?
When the like statement is used?
What is the difference between cursor and select statement?
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 can you find out the # of rows updated after an update statement?
What is null value in db2?
Mention the way of highlighting as well as putting a cursor to use in a cobol program.
