1 1 import pymysql
2 2
3 3 db = pymysql.connect(host=‘localhost‘, user=‘root‘, password=‘123456‘, database=‘jddj‘,port=3306)
4 4 cursor = db.cursor()
5 5
6 6 # 方式1:Python的字符串格式化,String类型需要加上单引号
7 7 upc = ‘6971286372249‘
8 8 sql = "SELECT * FROM product WHERE upc=‘%s‘" % upc
9 9 cursor.execute(sql)
10 10
11 11 # 方式2:pymysql里excute自带的字符串拼接,不需要加上单引号
12 12 sql = "SELECT * FROM product WHERE upc=%s"
13 13 cursor.execute(sql, ‘6971286372249‘)
14 14
15 15 # 取出查询数据
16 16 data = cursor.fetchall()
17 17
18 18 db.close()
python执行sql语句里字符串格式化是否添加单引号的两种情况
原文地址:https://www.cnblogs.com/hongdanni/p/14467592.html