oracle函数

AND trunc(o1.book_time) >= TRUNC(to_date('2013-09-04 00:00:00','YYYY-MM-DD hh24:mi:ss'))
                                          AND trunc(o1.book_time) <= TRUNC(to_date('2013-09-04 00:00:00','YYYY-MM-DD hh24:mi:ss'))

 

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