Python MySQL插入操作如何实现（） _Python最新开发教程

本文概述

向表添加记录
插入多行
行编号

向表添加记录 INSERT INTO语句用于将记录添加到表中。在python中, 我们可以提及格式说明符(％s)代替值。
【Python MySQL插入操作如何实现（）】我们在游标的execute()方法中以元组的形式提供实际值。
考虑以下示例。
例子

import mysql.connector#Create the connection object myconn = mysql.connector.connect(host = "localhost", user = "root", passwd = "google", database = "PythonDB")#creating the cursor objectcur = myconn.cursor()sql = "insert into Employee(name, id, salary, dept_id, branch_name) values (%s, %s, %s, %s, %s)"#The row values are provided in the form of tuple val = ("John", 110, 25000.00, 201, "Newyork")try:#inserting the values into the tablecur.execute(sql, val)#commit the transaction myconn.commit()except:myconn.rollback()print(cur.rowcount, "record inserted!")myconn.close()

输出

1 record inserted!

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插入多行我们还可以使用python脚本一次插入多行。提及多行作为各种元组的列表。
列表的每个元素都被视为一个特定的行, 而元组的每个元素都被视为一个特定的列值(属性)。
考虑以下示例。
例子

import mysql.connector#Create the connection object myconn = mysql.connector.connect(host = "localhost", user = "root", passwd = "google", database = "PythonDB")#creating the cursor objectcur = myconn.cursor()sql = "insert into Employee(name, id, salary, dept_id, branch_name) values (%s, %s, %s, %s, %s)"val = [("John", 102, 25000.00, 201, "Newyork"), ("David", 103, 25000.00, 202, "Port of spain"), ("Nick", 104, 90000.00, 201, "Newyork")]try:#inserting the values into the tablecur.executemany(sql, val)#commit the transaction myconn.commit()print(cur.rowcount, "records inserted!")except:myconn.rollback()myconn.close()

输出

3 records inserted!

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行编号在SQL中, 特定行由插入ID(称为行ID)表示。我们可以通过使用游标对象的属性lastrowid来获取最后插入的行ID。
考虑以下示例。
例子

import mysql.connector#Create the connection object myconn = mysql.connector.connect(host = "localhost", user = "root", passwd = "google", database = "PythonDB")#creating the cursor objectcur = myconn.cursor()sql = "insert into Employee(name, id, salary, dept_id, branch_name) values (%s, %s, %s, %s, %s)"val = ("Mike", 105, 28000, 202, "Guyana")try:#inserting the values into the tablecur.execute(sql, val)#commit the transaction myconn.commit()#getting rowidprint(cur.rowcount, "record inserted! id:", cur.lastrowid)except:myconn.rollback()myconn.close()

输出