Question

我有这样的数据

ID    StartDate       EndDate      DesigCode     FacilityID
------------------------------------------------------------
1      1-Jan 2015      1-Feb 2015      1             1
2      3-Feb 2015     10-Mar 2015      1             2
3      5-Apr 2015      3-June 2015     2             1
4      2-Jul 2015      6-Aug 2015      3             1
5     15-Sep 2015     30-Oct 2015      3             4
6     14-Nov 2015      1-Dec 2015      1             4

我要查询的结果是DesigCode列中连续相同值的最早日期。

ID   StartDate       EndDate     DesigCode    FacilityID
------------------------------------------------------------
1     1-Jan-2015     1-Feb 2015      1           1
3     5-Apr 2015     3-June 2015     2           1
4     2-Jul 2015     6-Aug 2015      3           1
6    14-Nov 2015     1-Sec 2015      1           4

我对这个查询一无所知。

Answer 1

尝试以下查询。它将返回每个设计代码的最低结束日期的记录。

from skimage import data
from skimage.filters import sobel
import matplotlib.pyplot as plt
from mpl_toolkits.mplot3d import Axes3D
import numpy as np
from matplotlib import cm
from scipy.ndimage import zoom
coins = data.coins()
coins = zoom(coins, 10)

elevation_map = sobel(coins)

fig = plt.figure()
ax = fig.add_subplot(111, projection='3d')

m, n=elevation_map.shape
X, Y = np.meshgrid(np.arange(n), np.arange(m))

ax.plot_surface(X, Y, elevation_map, cmap=cm.viridis, antialiased=False)
ax.axis("off")
ax.set_facecolor('black')
plt.show()

MS Access查询最早的连续值的日期

1 个答案: