Continues a findLast search by moving backward through the table from the current position, looking to see if the previous row exactly matches a value or full set of values in the current index.
Boolean findPrevious( )
true if successful, false otherwise.
The cursor is left on the previous row if it exactly matches the index value. On failure the cursor position is before the first row (isBOF).
The findPrevious method behavior is undefined if the column values being searched for are modified during a row update.