我无法将库存数据插入我的数据库

Question

def connect(date1,volumn1,price1,rise1,time1):
    #print type(date1),volumn1,price1,rise1,time1
    db=MySQLdb.connect("localhost","root","998426","stock")
    cursor=db.cursor()
    sql=" insert into tab1(date,volumn,price,rise,time) values(%s,%s,%f,%s,%s)"%(date1,volumn1,price1,rise1,time1)
    #sql = "insert into tab1(date,volumn,price,rise,time) values('2017/9/13 星期二','200',17.5,'2.14%','15:30')"    //this can work!
    try:
        cursor.execute(sql)
        db.commit()
    except:
        db.rollback()
    db.close()

date1，volumn1，rise1，time1是字符串;

price1是浮动;

Answer 1

    sql="insert into stock_CB(dates,volumn,price,rise,times) values('%s','%s',%f,'%s','%s')" % (date1.encode("utf-8"),volumn1.encode("utf-8"),price1,rise1.encode("utf-8"),time1.encode("utf-8"))

当我改变它时它可以工作。