32 lines
667 B
Markdown
32 lines
667 B
Markdown
---
|
|
title: '# Aggregations'
|
|
updated: 2022-04-03 17:09:07Z
|
|
created: 2022-04-03 17:00:47Z
|
|
---
|
|
|
|
```hive
|
|
SELECT
|
|
sum(CASE WHEN gender_age.gender = 'Male' THEN gender_age.age ELSE 0 END)/
|
|
count(CASE WHEN gender_age.gender = 'Male' THEN 1
|
|
ELSE NULL END) as male_age_avg
|
|
FROM employee;
|
|
|
|
SELECT
|
|
sum(coalesce(gender_age.age,0)) as age_sum,
|
|
sum(if(gender_age.gender = 'Female',gender_age.age,0)) as female_age_sum
|
|
FROM employee;
|
|
|
|
SELECT
|
|
if(name = 'Will', 1, 0) as name_group,
|
|
count(name) as name_cnt
|
|
FROM employee
|
|
GROUP BY if(name = 'Will', 1, 0);
|
|
```
|
|
|
|
```hive
|
|
SELECT
|
|
count(DISTINCT gender_age.gender) as gender_uni_cnt,
|
|
count(DISTINCT name) as name_uni_cnt
|
|
FROM employee;
|
|
```
|