SQL查询计算总计

Question

So let's say I have data in my query like this:

Name: |  Cost:
Oliver     20
Oliver     3
Oliver     2
Sarah      100
Sarah      7

How would I go about merging the data for each person into one row and having a total cost?

Answer 1

you can use group by and sum()

select name, sum(cost)
from your_table
group by  name