在Python中的SELECT语句中传递列名

if count == 1:
        cursor.execute("SELECT * FROM PacketManager WHERE ? = ?", filters[0], parameters[0])
        all_rows = cursor.fetchall()

    elif count == 2:
        cursor.execute("SELECT * FROM PacketManager WHERE ? = ? AND ? = ?", filters[0], parameters[0], filters[1], parameters[1])
        all_rows = cursor.fetchall()

    elif count == 3 :
        cursor.execute("SELECT * FROM PacketManager WHERE ? = ? AND ? = ? AND ? = ?", filters[0], parameters[0], filters[1], parameters[1], filters[2], parameters[2])
        all_rows = cursor.fetchall()

这是我程序中的代码段.我打算做的是在查询中传递列名和参数.

filters数组包含列名,参数数组包含参数.计数是用户设置的过滤器数量.过滤器和参数数组已准备就绪,没有问题.我只需要将它传递给查询即可执行.这给我一个错误“TypeError：函数最多需要2个参数”

您可以使用预定义的查询构建一个dict.

queries = {
    "foo": "SELECT * FROM PacketManager WHERE foo = ?",
    "bar": "SELECT * FROM PacketManager WHERE bar = ?",
    "foo_bar": "SELECT * FROM PacketManager WHERE foo = ? AND bar = ?",
}

# count == 1
cursor.execute(queries[filters[0], parameters[0])

# count == 2
cursor.execute(queries[filters[0] + "_" + queries[filters[1], parameters[0])

这种方法将使您从过滤器[0]中的SQL注入中保存.