增加

  • 创建testInsert.py文件,向学生表中插入一条数据
#encoding=utf-8

import MySQLdb

try:

    conn=MySQLdb.connect(host='localhost',port=3306,db='test1',user='root',passwd='mysql',charset='utf8')

    cs1=conn.cursor()

    count=cs1.execute("insert into students(sname) values('张良')")

    print count

    conn.commit()

    cs1.close()

    conn.close()

except Exception,e:

    print e.message

修改

  • 创建testUpdate.py文件,修改学生表的一条数据
#encoding=utf-8

import MySQLdb

try:

    conn=MySQLdb.connect(host='localhost',port=3306,db='test1',user='root',passwd='mysql',charset='utf8')

    cs1=conn.cursor()

    count=cs1.execute("update students set sname='刘邦' where id=6")

    print count

    conn.commit()

    cs1.close()

    conn.close()

except Exception,e:

    print e.message

删除

  • 创建testDelete.py文件,删除学生表的一条数据
#encoding=utf-8

import MySQLdb

try:

    conn=MySQLdb.connect(host='localhost',port=3306,db='test1',user='root',passwd='mysql',charset='utf8')

    cs1=conn.cursor()

    count=cs1.execute("delete from students where id=6")

    print count

    conn.commit()

    cs1.close()

    conn.close()

except Exception,e:

    print e.message

SQL语句参数化

  • 创建testInsertParam.py文件,向学生表中插入一条数据
#encoding=utf-8

import MySQLdb

try:

    conn=MySQLdb.connect(host='localhost',port=3306,db='test1',user='root',passwd='mysql',charset='utf8')

    cs1=conn.cursor()

    sname=raw_input("请输入学生姓名:")

    params=[sname]

    count=cs1.execute('insert into students(sname) values(%s)',params)

    print count

    conn.commit()

    cs1.close()

    conn.close()

except Exception,e:

    print e.message

其它语句

  • cursor对象的execute()方法,也可以用于执行create table等语句
  • 建议在开发之初,就创建好数据库表结构,不要在这里执行

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