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Table 1: col1 Timestamp 
         01-mar-2012 11:12:46

Table 2: col2 Timestamp
         01-mar-2012 11:12:10
         01-mar-2012 11:11:23

Write a query to display a row with table2 col2 value less
than tabl1 col1 value. Maximum timestamp value previous to
table1 col1 value.

Display a result as:

Col1                            col2
-----                           -----
01-mar-2012 11:12:46            01-mar-2012 11:12:10

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