正常情况下往数据库多张表中批量插入1000条数据，若一条一条insert插入，则调用sql语句查询插入需要执行几千次，花费时间长
现使用cursor.executemany（sql，args） ，可对数据进行批量插入，
其中args是一个包含多个元组的list列表，每个元组对应mysql当中的一条数据

以下是实例：
往数据库中的order表、order_detail表和pay表中插入1000条订单数据，订单详情数据以及支付数据
1.pay表中的id字段是order表中的pay_id字段
2.order表中的id字段是order_detail表中的order_id字段

1.初始化属性(包括host、port、user、password和database）

def __init__(self):
        self.__db_host=XXX
        self.__db_port=XXX
        self.__db_user=XXX
        self.__db_password=XXX
        self.__db_database=XXX

2.连接数据库

def isConnection(self):
        self.__db=pymysql.connect(
            host=self.__db_host,
            port=self.__db_port,
            user=self.__db_user,
            password=self.__db_password,
            database=self.__db_database,
            charset='utf8'
        )

3.批量往pay表中插入1000条数据

# 插入数据进pay表
    def pay_insert(self,pay_value):
        try:
            # 连接数据库
            self.isConnection()
            # 创建游标
            global cursor
            cursor=self.__db.cursor()
            # 执行
            cursor.executemany('insert into `pay表`(type,pay_money,pay_time,pay_no,STATUS,create_by,create_time,update_by,update_time) value (%s,%s,%s,%s,%s,%s,%s,%s,%s)',pay_value)
        except Exception as e:
            print e
        finally:
            cursor.close()
            self.__db.commit()
            self.__db.close()

    # 生成pay表所需字段，并调用sql
    def pay_data(self):
        pay_value=list()
        for i in range(1,1000):
            pay_value.append((0,8800,time.localtime(),str(random.randint(712300000000,712399999999)),3,49338,time.localtime(),49338,time.localtime()))
        now_time=time.localtime()
        self.pay_insert(pay_value)
        return now_time

4.pay表中生成的1000条数据，依次取出id

 # 获取pay_id
    def get_pay_id(self,now_time):
        try:
            self.isConnection()
            global cursor
            cursor=self.__db.cursor()
            cursor.execute('select id from `pay表` where create_time >= %s',now_time)
            id_value=list()
            for i in range(1,1000):
                pay_id=cursor.fetchone()
                id_value.append(pay_id)
            return id_value
        except Exception as e:
            print e
        finally:
            cursor.close()
            self.__db.commit()
            self.__db.close()

以下是完整代码：

# #!/usr/bin/python
# # -*- coding: UTF-8 -*-


import pymysql          # 先pip install pymysql
import random
import time

class DatabaseAcess:
    # 初始化属性(包括host、port、user、password和database）
    def __init__(self):
        self.__db_host=XXX
        self.__db_port=XXX
        self.__db_user=XXX
        self.__db_password=XXX
        self.__db_database=XXX

    # 连接数据库
    def isConnection(self):
        self.__db=pymysql.connect(
            host=self.__db_host,
            port=self.__db_port,
            user=self.__db_user,
            password=self.__db_password,
            database=self.__db_database,
            charset='utf8'
        )


    # 插入数据进pay表
    def pay_insert(self,pay_value):
        try:
            # 连接数据库
            self.isConnection()
            # 创建游标
            global cursor
            cursor=self.__db.cursor()
            # 执行
            cursor.executemany('insert into `pay表`(type,pay_money,pay_time,pay_no,STATUS,create_by,create_time,update_by,update_time) value (%s,%s,%s,%s,%s,%s,%s,%s,%s)',pay_value)

        except Exception as e:
            print e
        finally:
            cursor.close()
            self.__db.commit()
            self.__db.close()


    # 生成pay表所需字段，并调用sql
    def pay_data(self,data_number):
        pay_value=list()
        for i in range(1,data_number):
            pay_value.append((0,8800,time.localtime(),str(random.randint(712300000000,712399999999)),3,49338,time.localtime(),49338,time.localtime()))
        now_time=time.localtime()
        self.pay_insert(pay_value)
        return now_time


    # 获取pay_id
    def get_pay_id(self,now_time,data_number):
        try:
            self.isConnection()
            global cursor
            cursor=self.__db.cursor()
            cursor.execute('select id from `pay表` where create_time >= %s',now_time)
            id_value=list()
            for i in range(1,data_number):
                pay_id=cursor.fetchone()
                id_value.append(pay_id)
            return id_value
        except Exception as e:
            print e
        finally:
            cursor.close()
            self.__db.commit()
            self.__db.close()


    # 插入数据进order表
    def order_insert(self,order_value):
        try:
            self.isConnection()
            global cursor
            cursor=self.__db.cursor()
            cursor.executemany('insert into `order表` (student_name,student_id,school_id,school_name,tel,height,sex,pay_id,order_no,status,original_price,payment_price,order_type,create_by,create_time,update_by,update_time,purchase_id,dept_id,sub_order_mid,class_name,shoe_size,student_no,weight) value (%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s)',order_value)
        except Exception as e:
            print e
        finally:
            cursor.close()
            self.__db.commit()
            self.__db.close()


    # 生成order表所需字段，并调用sql
    def order_data(self,id_value,data_number):
        order_value=list()
        for i in range(1,data_number):
            pay_id=str(id_value[i-1]).replace("L,)","").replace("(","")
            order_value.append(("周瑜",35999,346,"A城小学","13322222222",130,1,pay_id,str(random.randint(7100000000,7999999999)),2,8800,8800,1,49338,time.localtime(),49338,time.localtime(),405,121,564123698745632,"三年级 3班",30,30,30))
        sys_time=time.localtime()
        self.order_insert(order_value)
        return sys_time


    # 获取order_id
    def get_order_id(self,sys_time,data_number):
        try:
            self.isConnection()
            global cursor
            cursor=self.__db.cursor()
            cursor.execute('select id from `order表` where create_time >= %s',sys_time)
            order_id_list=list()
            for i in range(1,data_number):
                order_id_list.append(cursor.fetchone())
            return order_id_list
        except Exception as e:
            print e
        finally:
            cursor.close()
            self.__db.commit()
            self.__db.close()


    # 插入数据进order_detail表
    def order_detail_insert(self,detail_value):
        try:
            self.isConnection()
            global cursor
            cursor=self.__db.cursor()
            cursor.executemany('insert into `order_details表` (order_id,commodity_name,commodity_id,original_price,payment_price,img,number,status,create_by,create_time,update_by,update_time) value (%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s)',detail_value)
        except Exception as e:
            print e
        finally:
            cursor.close()
            self.__db.commit()
            self.__db.close()


    # 生成order_detail表所需字段，并调用sql
    def order_detail_data(self,order_id_list,data_number):
        detail_value=list()
        for i in range(1,data_number):
            order_id=str(order_id_list[i-1]).replace("L,)","").replace("(","")
            detail_value.append((order_id,"A城小学春季校服","1382932636506902530",8800,8800,"https://ygxf-dev2.obs.cn-north-1.myhuaweicloud.com:443/image%2F1618551784845-589.jpg",1,2,49338,time.localtime(),49338,time.localtime()))
        self.order_detail_insert(detail_value)


if __name__ == '__main__':
    db=DatabaseAcess()
    data_number=3
    db.order_detail_data(order_id_list=db.get_order_id(sys_time=db.order_data(id_value=db.get_pay_id(now_time=db.pay_data(data_number=data_number),data_number=data_number),data_number=data_number),data_number=data_number),data_number=data_number)
    print ("{0}条数据插入完成".format(data_number-1))