多条件筛选

AI 助力的 SQL 查询进阶

Jasmin Ludolf

Senior Data Science Content Developer

多条件筛选

按多重条件筛选，如图书体裁与发行日期

所有条件均为真

提示： 显示1990年后上映、片长小于90分钟的英文影片

SELECT title, release_year, duration
FROM films
WHERE release_year > 1990
AND language = 'English'
AND duration < 90;

|title                   |release_year|duration|
|------------------------|------------|--------|
|Showdown in Little Tokyo|1991        |79      |
|Stone Cold              |1991        |88      |
|Teenage Mutant Ninja ...|1991        |88      |
...

二选一（OR）

提示： 显示1990年后上映的英文或法文影片

SELECT title, release_year, language 
FROM films
WHERE (language = 'English' OR language = 'French') AND release_year > 1990;

|title                   |release_year|language|
|------------------------|------------|--------|
|Beastmaster 2: Throug...|1991        |English |
|Bill & Ted's Bogus Jo...|1991        |English |
|Boyz n the Hood         |1991        |English |
...

使用括号

SELECT title, release_year, language 
FROM films
WHERE language = 'English' OR language = 'French' AND release_year > 1990;

|title              |release_year|language|
|-------------------|------------|--------|
|The Broadway Melody|1929        |English |
|Hell's Angels      |1930        |English |
|A Farewell to Arms |1932        |English |
|42nd Street        |1933        |English |
...

数据范围

提示： 显示1990—1999年上映的影片标题和年份

SELECT title, release_year
FROM films
WHERE release_year BETWEEN 1990 AND 1999;

|title                      |release_year|
|---------------------------|------------|
|Arachnophobia              |1990        |
|Back to the Future Part III|1990        |
...

等价于 release_year >= 1990 AND release_year <= 1999

检查多个取值

提示： 显示日本、意大利或西班牙的影片标题和国家

SELECT title, country
FROM films
WHERE country = 'Japan' OR country = 'Italy' OR country = 'Spain';

|title                         |country|
|------------------------------|-------|
|Seven Samurai                 |Japan  |
|A Fistful of Dollars          |Italy  |
|The Good, the Bad and the Ugly|Italy  |
...

检查多个取值

提示： 显示日本、意大利或西班牙的影片标题和国家

SELECT title, country
FROM films
WHERE country IN ('Japan', 'Italy', 'Spain');

|title                         |country|
|------------------------------|-------|
|Seven Samurai                 |Japan  |
|A Fistful of Dollars          |Italy  |
|The Good, the Bad and the Ugly|Italy  |
...

排除多个取值

提示： 显示影片标题和语言，排除英语和法语

SELECT title, language
FROM films
WHERE language NOT IN ('English', 'French')';

|title        |language|
|-------------|--------|
|Metropolis   |German  |
|Pandora's Box|German  |
|Seven Samurai|Japanese|
...

验证复杂筛选

AND：要求多个条件同时成立
OR：接受任一条件
BETWEEN：范围
IN / NOT IN：多个取值
用括号分组条件，控制逻辑

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