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SQL Fun Class
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Training in this section
Training in this section
目录列表
SQL Fun Class
Basic concepts of database
Database introductio...
DatabaseSELECT
Database SQL syntax ...
Database select mult...
DISTINCT and LIMIT
Database sorting res...
Basic database conce...
Database operators, functions, subqueries
WHERE statement
AND, OR operators
IN, NOT IN operator
Custom columns
Database functions
Database subquery
LIKE and MIN
Training in this sec...
Database connection, table operations
table join
Connection Type
UNION operator
INSERT statement
UPDATE and DELETE st...
CREATE TABLE
NOT NULL 和 AUTO_INCR...
ALTER, DROP, RENAME ...
SQL view
Training in this sec...
Database comprehensive training
Comprehensive traini...
Comprehensive traini...
填写,从 "students" 表中选择就读于 "MIT" 大学的所有学生。
SELECT * FROM
university = 'MIT';
拖拉排序代码,选择就读于
ORDER BY university;
SELECT name,
university
IN ('Stanford',
'MIT')
FROM students WHERE university
什么关键字用于自定义列?
AND
OR
AS
LIKE
什么函数用于计算数值列的平均值?
SUM()
MIN()
SORT()
AVG()
填写空格,从 "students" 表中选择年龄大于平均年龄的 "name" 和 "age"。使用子查询来计算平均年龄。
name, age FROM students
age > (SELECT
(age) FROM students);
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