SQL:Analyzing Business Metrics in codecademy & belajar PHP di dumetschool

       Advanced Aggregates
1.introduction
2,daily counts
3.daily count 2
4.daily revenue
5.daily sum conclusion
6.meal sums
7.product sums 2
8.product sum conclusion
9.grouping with case statements
10.product grouping conclusion
11.reorder rates
12.conclusion
    Common Metrics
1.introduction
2.daily revenue
3.daily revenue 2
4.daily active users
5.daily active users
6.daily average revenue per purchasing user
7.daily average revenue per user
8.ARPU 2
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9.ARPU 3
10.ARPU 3
11.1 day retention
12.1 day retention 2
13.1 day retention 3
14.comon metrics conclusion

1.pengenalan codeigneter
2.melakukan looping while dengan dua variable
3.melakukan looping for dengan dua variable
4.menghitung jumlah kata
5.penggunaan fungsi break dan continue
6.cara mencari anggota array