python操作数据库

时间:2022-09-12 15:46:34

python操作数据库

插入数据

  • import pymysql
    conn = pymysql.Connection(host = '127.0.0.1',user = 'root',password = '123',database = 'day39')
    
    cur = conn.cursor()
    
    username = "太亮"
    sql = 'insert into employee(emp_name,sex,age,hire_date) values (%s,"female",88,20170808)'
    cur.execute(sql,(username,))
    conn.commit()#插入需要提交,不然只是在内存中做出了操作,数据库中数据没改变
    
    cur.close()
    conn.close()

查询数据

  • #查询
    import pymysql
    conn = pymysql.Connection(host = '127.0.0.1',user = 'root',password = '123',database = 'day39')
    cur = conn.cursor()#游标数据库操作符
    
    sql = 'select emp_name,salary from employee where age < %s'
    cur.execute(sql,(80,))
    
    #获取结果
    ret1 = cur.fetchone()#接受一个数据
    ret2 = cur.fetchmany(2)#接受多个数据,可设定参数
    ret3 = cur.fetchall()#全部接受
    
    print(ret1)
    print(ret2)
    print(ret3)
    
    cur.close()
    conn.close()

其余暂无>>>>