1.SQL练习1-3

Lesson 1: SELECT 查询 101

题目

答案

1. select title from movies

2. select director from movies;

3. select title,director from movies;

4. select title,year from movies;

5. select * from movies;

Lesson 2: 条件查询 (constraints) (Pt. 1)

题目

答案

1. select * from movies where id = 6;

2. select * from movies where year>=2000 and year <=2010;

3. select * from movies where year not between 2000 and 2010;

4. select * from movies where id<6;

5. select * from movies where year>=2010 and length_minutes<120;

6. select year,length_minutes from movies where year = 1999 or year = 2009;

   BETWEEN 操作符

   操作符 BETWEEN … AND 会选取介于两个值之间的数据范围。这些值可以是数值、文本或者日期。

Lesson 3: 条件查询(constraints) (Pt. 2)

题目

答案：

1. select * from movies where title like ‘%Toy Story%’;
2. select * from movies where director like ‘%John Lasseter%’;
3. select * from movies where director not like ‘%John Lasseter%’;
4. select * from movies where title like ‘wall%’;

asseter%’;
4. select * from movies where title like ‘wall%’;

LIKE 操作符用于在 WHERE 子句中搜索列中的指定模式。"%" 可用于定义通配符（模式中缺少的字母）。
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