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Say I have a table like this in Sequel Pro:
SaleID VendorID
1 A
2 C
3 E
4 C
5 D
And I want to find the percentage of sales in which Vendor C was the vendor. (Obviously in this case it is 40%, but I'm working with much bigger tables). How would I do that? I was thinking something using the Count function, but I'm not sure how I would do it exactly. Thanks!
446
There is no built-in operator that calculates percentages in SQL Server. You have to rely on basic arithmetic operations i.e. (number1/number2 x 100) to find percentages in SQL Server.
The SQL LIKE Operator There are two wildcards often used in conjunction with the LIKE operator: The percent sign (%) represents zero, one, or multiple characters. The underscore sign (_) represents one, single character.
PERCENT_RANK() The PERCENT_RANK function in SQL Server calculates the relative rank SQL Percentile of each row. It always returns values greater than 0, and the highest value is 1.
Selection symbols to narrow row selection To select rows using selection symbols for character or graphic data, use the LIKE keyword in a WHERE clause, and the underscore and percent sign as selection symbols.
select sum(case when vendorID = 'C' then 1 else 0 end) * 100 / count(*)
from your_table
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