Python实现查找数据库最接近的数据

import pymysql
value=32

conn = pymysql.connect(host='39.106.168.84', user='xxxxxxx', password='xxxxxxx', port=3306,
            db='flask_topvj_net')
cur = conn.cursor()
sql="select * from `student` order by abs(`id` - '%s') limit 1" %(value)
cur.execute(sql)
u = cur.fetchall()
print(u)
conn.close()