测试用的数据
1. sum(LABST) over()
2. sum(LABST) over(order by MATNR)
3.sum(LABST) over(order by MATNR,ZWEEK)
4.sum(LABST) over(partition by MATNR order by MATNR)
5.sum(LABST) over(partition by MATNR order by MATNR,ZWEEK)
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