摘要:  

1自动化单条insert  => 单条insert的话插入5w条数据大约用时5秒左右,相对来说效率不高

2拼接sql语句,只执行一次insert   =>使用这种批量插入方式插入5w条数据用时大约不到1秒

 

1.自动化单条insert

# -*- coding:utf-8 -*-
import time
from pymysql import *
# 装饰器,计算插入50000条数据需要的时间
def timer(func):
    def decor(*args):
        start_time = time.time()
        func(*args)
        end_time = time.time()
        d_time = end_time - start_time
        print("the "+str(func.__name__)+" running time is : ", d_time)

    return decor

@timer
def add_test_users():

    conn = connect(host='127.0.0.1', port='3306', user='root', password='root', database='数据库名', charset='utf8')
    cs = conn.cursor()  # 获取游标
    for num in range(0, 50000):
        try:
            sql = "insert into '表名'(字段名) values(值)"
            cs.execute(sql)
        except Exception as e:
            return          
    conn.commit()  # 提交
    cs.close()
    conn.close()
    print('OK')

add_test_users()

单条insert的话插入5w条数据大约用时5秒左右,相对来说效率不高

 

2.拼接sql语句,只执行一次insert

# -*- coding:utf-8 -*-
import time
from pymysql import *

# 装饰器,计算插入50000条数据需要的时间
def timer(func):
    def decor(*args):
        start_time = time.time()
        func(*args)
        end_time = time.time()
        d_time = end_time - start_time
        print("the running time is : ", d_time)

    return decor

@timer
def add_test_users():
    
    usersvalues = []
    for num in range(1, 50000):
        usersvalues.append(('zhangsan','23'))  # 注意要用两个括号扩起来

    conn = connect(host='127.0.0.1', port='3306', user='root', password='root', database='数据库名', charset='utf8')
    cs = conn.cursor()  # 获取光标
    # 注意这里使用的是executemany而不是execute,下边有对executemany的详细说明
    cs.executemany('insert into '表名'(name,age) values(%s,%s)', usersvalues)
    conn.commit()
    cs.close()
    conn.close()
    print('OK')
add_test_users()

原文: https://blog.csdn.net/weixin_42703149/article/details/85120029

posted on 2021-09-28 17:01  lshan  阅读(120)  评论(0编辑  收藏  举报