Qwery starting at the SCN 1234 will read all blocks
with the SCNs less or equal to the SCN at the time when
the query starts executing. As for the proper answer, 
would it be something like 'you can shove testing up....'?

-----Original Message-----
Sent: Tuesday, January 30, 2001 3:14 AM
To: Multiple recipients of list ORACLE-L


Hello All,

Q.1 : If the current System Change Number(SCN) is 1234, which of the
following blocks are read on behalf of the query, 
assuming all the blocks contain data related to the query

1. blocks with SCNs 1024, 1359
2. blocks with SCNs 1455, 1543
3. blocks with SCNs 345, 1233
4. all of them
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