1建立数据库连接（db=pymysql.connect(...))
2创建游标对象(cur=db.cursor())
3游标方法：cur.execute("insert...")
4提交到数据库或者获取数据：db.commit()/db.fetchall()
5关闭游标对象:cur.close()
6关闭数据库连接：db.close()
name = input(">>")
sql = "select name,score from cls where name=%s or score > %s;"
cur.execute(sql,[name,85]) #第二个位置只能放参量，参量指我们查询时的条件
cur.fetchone()
cur.fetchmany(10)
cur.fetchall
写操作
import pymysql db = pymysql.connect(host=‘localhost‘,port=3306,user=‘root‘,password=‘159357‘,database=‘books‘,charset=‘utf8‘) cur = db.cursor() try: sql = "update book set price=33 where title=%s" cur.execute(sql,["边城"]) db.commit() except Exception as e: print(e) db.rollback() cur.close() db.close()
原文：https://www.cnblogs.com/gao-chao/p/13256366.html