如何將數據庫中的值與 SQLite3 中的變量與 python 進行比較

Question

您好，有兩件事我需要幫助：首先，我 go 如何使用 SQSLite3 將變量與數據庫中的數據進行比較？ （第 9 行）其次，我將如何組合第 9 行和第 11 行，以便在插入數據時將其插入同一行？

import sqlite3

con = sqlite3.connect('Coursework.db')
NumberofS = 59
NumberofMS = 62
X = 'Stationary Waves on a String'
c = con.cursor()

c.execute("INSERT INTO Request (Equipment, Practical_Name) SELECT Equipment, Practical_Name FROM Practicals WHERE Practical_Name = (X) ")

c.execute("INSERT INTO Request (Number_of_Students, Method_Sheets) VALUES(?, ?)", (NumberofS, NumberofMS))

con.commit()

con.close()

任何幫助將不勝感激

Answer 1

只需將插入選擇中的兩個查詢與三個參數組合在一起，其中數字參數作為常量運行：

sql = (
    "INSERT INTO Request (Equipment, Practical_Name, Number_of_Students, Method_Sheets) "
    "SELECT Equipment, Practical_Name, ? AS Number_of_Students, ? AS Method_Sheets "
    "FROM Practicals "
    "WHERE Practical_Name = ?"
) 

c.execute(sql, [NumberofS, NumberofMS, X])
con.commit()