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详解mysqlclient

一、怎么配置mysqlclient

mysqlclient是Python环境下用来连接MySQL数据库的模块,它是利用C API进行编写的。下面介绍如何配置mysqlclient:

1、安装MySQL数据库:

    
        sudo apt-get install mysql-server
    

2、安装mysqlclient:

    
        pip install mysqlclient
    

3、测试连接:

    
        import MySQLdb

        conn = MySQLdb.connect(host="localhost", user="root", passwd="", db="test")
        cursor = conn.cursor()
        cursor.execute("SELECT * FROM users")
        result = cursor.fetchall()
        print(result)
        cursor.close()
        conn.close()
    

二、client

mysqlclient可以通过Connection类来连接数据库实现增删改查等操作。

1、创建连接:

    
        import MySQLdb

        conn = MySQLdb.connect(user="root", passwd="", db="test", host="localhost")
    

2、创建游标:

    
        cursor = conn.cursor()
    

3、执行SQL语句:

    
        cursor.execute("CREATE TABLE student(id INT, name VARCHAR(20));")
        cursor.execute("INSERT INTO student VALUES (1, 'Alice');")
    

4、提交修改:

    
        conn.commit()
    

5、释放资源:

    
        cursor.close()
        conn.close()
    

三、Windows mysql安装教程

为了在Windows环境下进行mysqlclient的开发,需要先安装MySQL数据库:

1、下载安装程序:

    
        https://dev.mysql.com/downloads/mysql/
    

2、安装MySQL:

(1)按照提示一步步安装,注意选择需要的组件。(2)设置root用户的密码。

3、配置MySQL环境变量:

(1)把mysql安装目录下的bin目录的路径添加到PATH环境变量中。(2) 然后重新打开一个cmd窗口,输入mysql,如果出现mysql提示符说明配置成功。

四、 mysqlclient的使用示例

1、查询数据:

    
        import MySQLdb

        conn = MySQLdb.connect(host="localhost", user="root", passwd="", db="test")
        cursor = conn.cursor()
        cursor.execute("SELECT * FROM student")
        result = cursor.fetchall()
        for record in result:
            print("id: %d, name: %s" % (record[0], record[1]))
        cursor.close()
        conn.close()
    

2、插入数据:

    
        import MySQLdb

        conn = MySQLdb.connect(host="localhost", user="root", passwd="", db="test")
        cursor = conn.cursor()
        cursor.execute("INSERT INTO student VALUES (2, 'Bob')")
        conn.commit()
        cursor.close()
        conn.close()
    

3、更新数据:

    
        import MySQLdb

        conn = MySQLdb.connect(host="localhost", user="root", passwd="", db="test")
        cursor = conn.cursor()
        cursor.execute("UPDATE student SET name=%s WHERE id=%s", ("Tom", 1))
        conn.commit()
        cursor.close()
        conn.close()
    

4、删除数据:

    
        import MySQLdb

        conn = MySQLdb.connect(host="localhost", user="root", passwd="", db="test")
        cursor = conn.cursor()
        cursor.execute("DELETE FROM student WHERE id=%s", (2,))
        conn.commit()
        cursor.close()
        conn.close()