mweek サンプル1

入力データ
顧客 来店日 生年月日
customer1 19900115 19641222
customer1 19900131 19641222
customer1 19900521 19641222
customer1 19900611 19641222
customer2 19900122 19720103
customer2 19900521 19720103
customer2 19900801 19720103
customer3 19910303 19720103
customer4 * *
customer4 19900131 *
customer4 19900610 19900618
customer4 19900611 19900608

処理コマンド
mweek field=2

結果データ
顧客 来店日 生年月日 週番(来店日) 週番開始日付(来店日)
customer1 19900115 19641222 2 19900114
customer1 19900131 19641222 4 19900128
customer1 19900521 19641222 20 19900520
customer1 19900611 19641222 23 19900610
customer2 19900122 19720103 3 19900121
customer2 19900521 19720103 20 19900520
customer2 19900801 19720103 30 19900729
customer3 19910303 19720103 61 19910303
customer4 * * * *
customer4 19900131 * 4 19900128
customer4 19900610 19900618 23 19900610
customer4 19900611 19900608 23 19900610