我有这个查询：
select
OSFES97.CodeId, OSFBA97.CodeId, OSFES97.ReceiveDate
from
StockArchives OSFES97
inner join
StockArchives OSFBA97 on OSFBA97.ReceiveDate = OSFES97.ReceiveDate
where
OSFES97.CodeId <> OSFBA97.CodeId
它返回如下结果：
CodeId CodeId ReceiveDate
------------------------------------------
1 2 2019-01-13 15:55:20.537
2 1 2019-01-13 15:55:20.537
1 2 2019-01-13 15:55:30.537
2 1 2019-01-13 15:55:30.537
由于以下供我使用的记录被视为重复记录（如果它们具有相同的ReceiveDate），我想删除其中一个并实现此结果：
CodeId CodeId ReceiveDate
------------------------------------------
1 2 2019-01-13 15:55:20.537
1 2 2019-01-13 15:55:30.537
答案 0 :(得分：3)
使用import sys
import cv2
import numpy as np
import imutils
from PyQt5 import QtCore
from PyQt5.QtCore import Qt, QTimer
from PyQt5.QtWidgets import QApplication, QWidget, QHBoxLayout, QVBoxLayout, QLCDNumber, QSlider, QLabel, QCheckBox
from PyQt5.QtGui import QPixmap, QImage
class MyWindow(QWidget):
def __init__(self):
super().__init__()
self.imglabel = QLabel(self)
self.imglabel.setFixedSize(1200, 900)
ori_img = cv2.imread("../resources/omr-1-ans-ori.png", cv2.IMREAD_COLOR)
ori_img = imutils.resize(ori_img, height=960)
self.gray_img = cv2.cvtColor(ori_img, cv2.COLOR_BGR2GRAY)
self.gray_img_c = ori_img
self.thresh = False
self.thresh_karnel_size = 11
self.init_ui()
def init_ui(self):
# lcd = QLCDNumber(self)
hbox1 = QHBoxLayout()
cb_thresh = QCheckBox('thresh', self)
cb_thresh.setChecked(False)
cb_thresh.stateChanged.connect(self.changeTitleThresh)
hbox1.addWidget(cb_thresh)
thresh_slider = QSlider(Qt.Horizontal, self)
thresh_slider.setFocusPolicy(Qt.StrongFocus)
thresh_slider.setTickPosition(QSlider.TicksBothSides)
thresh_slider.setTickInterval(1)
thresh_slider.setSingleStep(1)
thresh_slider.setPageStep(1)
thresh_slider.setMinimum(1)
thresh_slider.setMaximum(127)
thresh_slider.valueChanged[int].connect(self.threshSliderChangeValue)
vbox = QVBoxLayout()
vbox.addLayout(hbox1)
vbox.addWidget(thresh_slider)
vbox.addWidget(self.imglabel)
self.setLayout(vbox)
self.setGeometry(50, 50, 1200, 768)
self.setWindowTitle('Learning PyQT5')
self.updateImage()
self.show()
def changeTitleThresh(self, state):
# print("thresh checkbox: ", state, Qt.Checked)
if state == Qt.Checked:
self.thresh = True
else:
self.thresh = False
def threshSliderChangeValue(self, value):
ksize = (value * 2) + 1
print("ksize: ", ksize)
if ksize > 1 and ksize % 2 != 0 and self.thresh:
self.thresh_karnel_size = ksize
self.gray_img = cv2.threshold(self.gray_img, self.thresh_karnel_size, 255, cv2.THRESH_BINARY)[1]
self.gray_img_c = cv2.cvtColor(self.gray_img.copy(), cv2.COLOR_GRAY2BGR)
self.updateImage()
def updateImage(self):
height, width, channel = self.gray_img_c.shape
bytesPerLine = 3 * width
qImg = QImage(self.gray_img_c.data, width, height, bytesPerLine, QImage.Format_RGB888)
pixMap = QPixmap.fromImage(qImg)
pixMap = pixMap.scaled(700, 500, Qt.KeepAspectRatio)
self.imglabel.setPixmap(pixMap)
self.imglabel.show()
if __name__ == '__main__':
app = QApplication(sys.argv)
ex = MyWindow()
sys.exit(app.exec_())
运算符将创建这些（逻辑）重复项。相反，您可以决定要使用哪个ID较低的列，并相应地使用<>或<。例如：
>