如何将数据库中的值与 SQLite3 中的变量与 python 进行比较

Question

您好，有两件事我需要帮助：首先，我 go 如何使用 SQSLite3 将变量与数据库中的数据进行比较？ （第 9 行）其次，我将如何组合第 9 行和第 11 行，以便在插入数据时将其插入同一行？

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()

任何帮助将不胜感激

Answer 1

只需将插入选择中的两个查询与三个参数组合在一起，其中数字参数作为常量运行：

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()