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重寫後的標(biāo)題為:使用Python進(jìn)行MySQL查詢
P粉604507867
P粉604507867 2023-09-12 08:59:48
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我是Python和SQL的新手。我正在嘗試建立一個(gè)簡單的程式碼來建立和存取一個(gè)資料庫,然後建立一個(gè)表,以便試圖理解SQL的工作原理。為了做到這一點(diǎn),我有以下程式碼:

import mysql.connector
from companyClient import client

def createTable():
    cursor.execute("CREATE TABLE Clients" 
         "(id INT NOT NULL AUTO_INCREMENT,"
        "name VARCHAR (32) NOT NULL,"
        "surname VARCHAR (64) NOT NULL,"
        "PRIMARY KEY (id));")

    print("Table created!")


def showTable():
    print("************** Clients Table *************\n")
    tableContent = cursor.execute("SELECT * FROM Clients")
    

def createEntry():
    cursor.execute("INSERT INTO Company.Clients (name, surname) VALUES ('John','Smith')")

def addUser(userToAdd):
    try:
        cursor.execute("INSERT INTO Company.Clients VALUES %s, %s, %s", userToAdd.id, userToAdd.name, userToAdd.surname)
    except:
        print("It is not possible to add the user. Please try again.")

def findUser(userToFind):
    if(cursor.execute("SELECT * FROM Company.Clients WHERE id = %s "), userToFind.id) :
        return True
    else:
        return False

def removeUser(userToRemove):
    try:
        cursor.execute("REMOVE * FROM Company.Clients WHERE id = %s ", userToRemove.id)
    except:
        print("It is not possible to remove this user. Please try again.")

#server connection 
conexion = mysql.connector.connect(
    host="localhost",
    user="********",
    passwd="*********",
    database="Company"
)

cursor = conexion.cursor()
showTable()

我正在使用SQL Workbench來管理資料庫。我已經(jīng)呼叫了createTable函數(shù)在Company資料庫中建立了表格「Clients」。使用SQL Workbench,我已經(jīng)新增了一個(gè)條目,只是為了檢查我如何在Python中取得該條目。然而,當(dāng)我呼叫showTable函數(shù)時(shí),tableContent的值是空的。除了目前的查詢SELECT * FROM Clients之外,我還嘗試了SELECT * FROM Company.Clients,得到了完全相同的結(jié)果。我如何正確存取表中的條目?

P粉604507867
P粉604507867

全部回覆(1)
P粉819533564

我有這個(gè)問題。我發(fā)現(xiàn)我需要做的唯一一件事就是在發(fā)出查詢以獲取實(shí)際條目之後添加

records = cursor.fetchall()

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