Amazon Spectrum直接从字符串加载增量

时间:2018-11-08 16:44:20

标签: sql amazon-redshift amazon-redshift-spectrum

我从光谱中获取一个字段作为“文件名Pro_180913_171842”。 尝试了

之类的sql函数
import tkinter as tk

class Menu(tk.Menu):
    def __init__(self, controller):
        super().__init__()
        self.controller = controller
        controller.config(menu=self)
        file_menu = tk.Menu(self, tearoff=0)
        self.add_cascade(label="File", menu=file_menu)
        file_menu.add_command(label="Exit", command=self.handle_exit)

    def handle_exit(self):
        # What can I do here that will be handled by
        # protocol "WM_DELETE_WINDOW" of the main class?
        # All I can find is destroy() and quit()
        # But both of these do not get handled by "WM_DELETE_WINDOW".

def start(controller):
    Menu(controller)

但它仅返回空行!

1 个答案:

答案 0 :(得分:0)

您的字段没有日期部分,因此,除非我们添加日期信息,否则将其与完整的时间戳进行比较是没有意义的。如果您只打算比较时间,请尝试以下方法:

SELECT fields
FROM spectrum.ex
WHERE SPLIT_PART('filename Pro_180913_171842', '_', 2) > '151354';