SQL语句练习 自学SQL网 基础查询

目录

Day1 简单条件查询

Day2 简单条件查询

Day3 复杂条件查询

Day4 查询结果 Filtering 过滤和 sorting 排序

Day5 SELECT综合条件查询

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Day1 简单条件查询

SELECT Title FROM movies;SELECT Director FROM movies;SELECT Title , Director FROM movies;SELECT Title ,Year FROM movies;SELECT * FROM movies;SELECT Title , Id , Length_minutes FROM movies;

Day2 简单条件查询

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SELECT * FROM movies WHERE Id=6;SELECT * FROM movies WHERE year BETWEEN 2000 AND 2010;SELECT * FROM movies WHERE year NOT BETWEEN 2000 AND 2010;SELECT * FROM movies ORDER BY Id LIMIT 5;SELECT * FROM movies WHERE Year >=2010AND Length_minutes <120

Day3 复杂条件查询

SELECT * FROM movies WHERE Title LIKE "%Toy Story%";SELECT * FROM movies WHERE Director = "John Lasseter";SELECT * FROM movies WHERE Director !="John Lasseter";SELECT * FROM movies WHERE Title LIKE "WALL-%";SELECT * FROM movies WHERE Year = 1998 AND Title = "A Bug's Life";

Day4 查询结果 Filtering 过滤和 sorting 排序

SELECT DISTINCT Director FROM movies ORDER BY Director ASC;SELECT * FROM movies ORDER BY Year DESC LIMIT 4;SELECT * FROM movies ORDER BY Title ASC LIMIT 5;SELECT * FROM movies ORDER BY Title ASC LIMIT 5 OFFSET 5 ; SELECT Title FROM movies WHERE Director = "John Lasseter" ORDER BY Length_minutes ASC LIMIT 1 OFFSET 3;

Day5 SELECT综合条件查询

SELECT * FROM north_american_cities WHERE Country = "Canada";SELECT * FROM north_american_cities WHERE Longitude>(SELECT Longitude FROM north_american_cities WHERE City = "Chicago")ORDER BY Longitude ASCSELECT * FROM north_american_cities WHERE Country="Mexico"ORDER BY Population DESCLIMIT 2;SELECT * FROM north_american_cities WHERE Country=="United States"ORDER BY Population ASCLIMIT 2 OFFSET 2;