Beginners Guide to TikTok for Search - Rachel Pearson - We are Tilt __ Bright...
Optimising Column stores with statistical analysis
1.
2. Turning Rows into Columns
Sales
Product
Customer
I
D
Value
I
D
Customer
1
Beer
1
Thomas
2 GBP
2
Beer
2
Thomas
2011-1125
10 GBP
3
Vodka
3
Thomas
4
Whiskey
4
Christian
5
Whiskey
5
Christian
6
Vodka
6
Alexei
7
Vodka
7
Alexei
Product
Customer
Date
Sale
Beer
Thomas
2011-1125
2 GBP
Beer
Thomas
2011-1125
Vodka
Thomas
And so on…
until…
Whiskey
Christian
2011-1125
5 GBP
Whiskey
Christian
2011-1125
5 GBP
Vodka
Alexei
2011-1125
10 GBP