データの要約

中級 SQL

Jasmin Ludolf

Data Science Content Developer, DataCamp

書類の束と虫眼鏡を示す写真

集計関数

AVG(), SUM(), MIN(), MAX(), COUNT()

SELECT AVG(budget)
FROM films;

|avg             |
|----------------|
|39902826.2684...|

SELECT SUM(budget)
FROM films;

|sum         |
|------------|
|181079025606|

SELECT MIN(budget)
FROM films;

|min|
|---|
|218|

SELECT MAX(budget)
FROM films;

|max        |
|-----------|
|12215500000|

数値フィールドのみ

さまざまなデータ型

MIN() <-> MAX()

最小値 <-> 最大値

最低 <-> 最高

A <-> Z

1715 <-> 2022

0 <-> 100

SELECT MIN(country)
FROM films;

|min        |
|-----------|
|Afghanistan|

SELECT MAX(country)
FROM films;

|max         |
|------------|
|West Germany|

SELECT MIN(country)
FROM films;

|min        |
|-----------|
|Afghanistan|

SELECT MIN(country) AS min_country
FROM films;

|min_country|
|-----------|
|Afghanistan|

中級 SQL