[問題] 請問SAS合併要怎麼讓資料自己補齊?
大家好
我現在有兩個檔想合併
檔A 檔B
year month price year month quantity
1990 1 20
1990 2 20
1990 3 10
1990 4 10
1990 5 15
1990 6 10 1990 6 200
1990 7 30
1990 8 20
1990 9 10
1990 10 10
1990 11 22
1990 12 25
請問要怎麼併才能併成
year month price quantity
1990 1 20 200
1990 2 20 200
1990 3 10 200
1990 4 10 200
1990 5 15 200
1990 6 10 200
1990 7 30 200
1990 8 20 200
1990 9 10 200
1990 10 10 200
1990 11 22 200
1990 12 25 200
感激不盡!
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