讲得真好，之前我就是原生态来写企业站，虽然简化很多工作，但是每次要修改的时候得修改很多东西，看了这个我觉得我有必要去改下我的代码了。

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同学您好，可以的！

idxougxdftogkyyfbkqwzfydwlyadmegxyi

1、插入数据：

　　　　>INSERT INTO tb_name(id,name,score)VALUES(NULL,'张三',140),(NULL,'张四',178),(NULL,'张五',134);

　　　　这里的插入多条数据直接在后边加上逗号，直接写入插入的数据即可；主键id是自增的列，可以不用写。

2、删除数据：

　　　　>DELETE FROM tb_name WHERE id=3;

3、指定更新数据：

　　　　>UPDATE tb_name SET score=189 WHERE id=2;

　　　　>UPDATE tablename SET columnName=NewValue [ WHERE condition ]

4、查找数据：

　　（1）、WHERE 语句：

　　　　>SELECT * FROM tb_name WHERE id=3;

　　（2）、HAVING 语句：

　　　　>SELECT * FROM tb_name GROUP BY score HAVING count(*)>2