Answer / harish konda

Dynamic cache is used to update/insert the records into the
cache during the session run. From there we can
update/target table with the NewLookupRow values returned by
lookup.

If you want to use the same lookup cache in other mappings
also then we will go for Persistent Cache.

The difference is for eg, in the first mapping when we use
dynamic cache, when the session ends, the cache gets deleted
automatically. So to use this cache in other mappings also
check give one option "Persistent Cache".

So when we use this option, the cache in the memory gets
Saved even after session ends. From there we can use that in
other mappings.

Answer / rayudu

If the lookup cache doesnt change between mutiple runs and
if we know that the lookup data doesnt change then we will
go for Persistant cache.


If the loopup cache changes between multiple session runs
and to keep the target table and lookup cache synchronized
we will use dynamic lookup cache .

regards,
rayudu.

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Consider a Phone Log table as below. It records all phone numbers that we dial in a given day. SOURCE_PHONE_NUMBER DESTINATION_PHONE_NUMBER CALL_START_DATETIME 1234 4567 01/07/2011 10:00 1234 2345 01/07/2011 11:00 1234 3456 01/07/2011 12:00 1234 3456 01/07/2011 13:00 1234 4567 01/07/2011 15:00 1222 7890 01/07/2011 10:00 1222 7680 01/07/2011 12:00 1222 2345 01/07/2011 13:00 Please provide an SQL query to display the source_phone_number and a flag where the flag needs to be set to Y if first called number and last called number are the same and N if the first called number and last called number are different. Desired Output: Source Number Is_Match 1222 N 1234 Y

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