Question

我想在PostgreSQL表中插入多行。我附上了这个程序。我使用了一个项目列表：new_record = [＆＃39; one＆＃39;，＆＃39; two＆＃39;＆＃39; three＆＃39;]。实际上，这个列表将填充来自亚马逊产品的100000个项目，但现在我填写了3个项目。我创建一个for循环迭代，但它只填充一个元素。我想打印所有项目。例如：

"INSERT INTO products(products_amazon) VALUES ('one')"
"INSERT INTO products(products_amazon) VALUES ('two')"
"INSERT INTO products(products_amazon) VALUES ('three')"

我将不胜感激。

import psycopg2
from pprint import pprint

database = "amazon_products"
host = "localhost"
user = "postgres"
password = "123QQsuccess"


class DatabaseConnection:
    def __init__(self):
        try:
            self.connection = psycopg2.connect(database=database, host=host, user=user, password=password)
            self.connection.autocommit = True
            self.cursor = self.connection.cursor()
        except:
            pprint('Cannot connect to database')

    def insert_new_record(self):
        new_record = ['one','two','three']
        for item in new_record:
            insert_command = "INSERT INTO products(products_amazon) VALUES ('" + item + "')"
        pprint(insert_command)
        self.cursor.execute(insert_command)

if __name__ == '__main__':
    database_connection = DatabaseConnection()
    database_connection.insert_new_record()

Answer 1

你尝试过这样吗？我希望它能适用于您的情况

$QUERY = "INSERT INTO emp_record(ename,ssn,dept,sallary,haddress) VALUES('$EName','$SSN','$Dept','$Salary','$HAddress')";

Answer 2

如果出于某种原因你真的想一次插入所有语句，只需使用; 连接所有插入语句，并将其作为单个字符串发送到数据库。

像这样：

"INSERT INTO products(products_amazon) VALUES ('one');
INSERT INTO products(products_amazon) VALUES ('two');
INSERT INTO products(products_amazon) VALUES ('three');"

在PostgreSQL表中插入多个项目

2 个答案: