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Mysql学习 文章目录【狂神】Mysql学习（代码）遇到的优化问题： 【狂神】Mysql学习（代码） -- SELECT * FROM student -- SELECT s_sex,COUNT(s_sex) as 人数 FROM student GROUP BY s_sex -- SELECT * FROM student WHERE s_name LIKE '%风%' -- SELECT c_id,COUNT(s_id) -- SHOW DATABASES -- CREATE DATAB

-- SELECT * FROM student -- SELECT s_sex,COUNT(s_sex) as 人数 FROM student GROUP BY s_sex -- SELECT * FROM student WHERE s_name LIKE '%风%' -- SELECT c_id,COUNT(s_id) -- SHOW DATABASES -- CREATE DATABASE kuang_a -- 目标：创建一个school数据库 -- 创建学生表（列，字段）使用sO.

-- SELECT * FROM student -- SELECT s_sex,COUNT(s_sex) as 人数 FROM student GROUP BY s_sex -- SELECT * FROM student WHERE s_name LIKE '%风%' -- SELECT c_id,COUNT(s_id) -- SHOW DATABASES -- CREATE DATABASE kuang_a -- 目标：创建一个school数据库 -- 创建学生表（列，字段）使用sOL.