Use google bigquery to build histogram graph

Question

How can write a query that makes histogram graph rendering easier?

For example, we have 100 million people with ages, we want to draw the histogram/buckets for age 0

Answer 1

Write a subquery like this:

(SELECT '1' AS agegroup, count(*) FROM people WHERE AGE <= 10 AND AGE >= 0)

Then you can do something like this:

SELECT * FROM
(SELECT '1' AS agegroup, count(*) FROM people WHERE AGE <= 10 AND AGE >= 0),
(SELECT '2' AS agegroup, count(*) FROM people WHERE AGE <= 20 AND AGE >= 10),
(SELECT '3' AS agegroup, count(*) FROM people WHERE AGE <= 120 AND AGE >= 20)

Result will be like:

Row agegroup count 
1   1       somenumber
2   2       somenumber
3   3       another number

I hope this helps you. Of course in the age group you can write anything like: '0 to 10'