python数据库批量插入数据的实现(executemany的使用)

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 pymysqlimport randomimport timeclass 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))

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最后更新于 2021-11-23 09:11:22 并被添加「」标签，已有位童鞋阅读过。

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