将列值添加到SQL中的下一列

My sql table is

我的sql表是

Week    Year    Applications
1       2017    0
2       2017    10
3       2017    20
4       2017    50
5       2017    0
1       2018    10
2       2018    0
3       2018    40
4       2018    50
5       2018    10
Week    Year    App