date1 amt1 date2 amt2 date3 amt3 (and so on till date50 amt50)
2010-01-18 400 2010-01-19 200 2010-01-30 600
2010-01-19 1200 2010-01-21 400 2010-01-23 1000
(more than 9,000 rows below)
Конвертировать в формат ниже:
date amt
2010-01-18 400
2010-01-19 200
2010-01-30 600
2010-01-19 1200
2010-01-21 400
2010-01-23 1000
(and so on)
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