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Answer Posted / saeed
clustering index attempts to maintain a particular order of
data, it try to keep newly inserted rows clustered
according to an index and avoid page splits.
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When a COBOL-DB2 program in PRODUCTION is updating main tables and gone for long run, what have to do?
What is an instance database?
What is difference between isnull and coalesce?
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.
ther r 2 tables OTTABLE & SALTABLE, add the otamt from OTTABLE to empsal of SALTABLE if eid is matched else add the unmatched from OTTABLE to SALTABLE
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Before you give the explain statement, what are the prerogatives?
I understand Join always perform better than subqueries. Then what is the advantage/use of Subqueries/correlated subqueries etc.,in DB2 programming.Please explain.
Why do chiropractors use drop table?
What are the 2 sqlcodes that are returned?
Give the name of some fields form sqlca.
What is universal database?
What is reorg?
in my project..TEST is db2 8.1 version In PROD it is 7.1 if i do REORG in TEST.. can I use the same REORG jcl with out modification in PROD region (this is DB2 8.1 )? if not, what modification i need to do in my REORG control card?
can all users have the privilage to use the sql statement select * (dml)?
