我有日期时间列，其值如下
2021-04-13 15:31:59
2021-04-13 15:29:59
2021-04-12 15:31:59
2021-04-12 15:29:59
2021-04-10 15:31:59
2021-04-10 15:29:59
2021-04-8 15:31:59
2021-04-8 15:29:59
我想选择表格中最近 3 天可用的数据
在上面的例子中是 2021-04-10 、 2021-04-12 和 2021-04-13
我尝试过类似下面的方法
SELECT * FROM `table` WHERE DATE(`timer`) >= DATE(NOW()) - INTERVAL 3 DAY
但是它返回的是 2021-04-12 的数据，因为没有 2021-04-11 的数据。
答案 0 :(得分：2)
在 MariaDB 10.2.32 中，您可以使用 using Microsoft.Extensions.Caching.Memory;
using Microsoft.Graph;
using Microsoft.Identity.Client;
using Project.Repository.Models;
using Project.Repository.Models.Azure.ADB2C;
using Project.Repository.Models.Constants;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net.Http;
using System.Text;
using System.Text.Json;
using System.Threading.Tasks;
namespace Project.Repository.Services.External
{
public class GraphApiService
{
private readonly IHttpClientFactory _clientFactory;
private readonly IMemoryCache _memoryCache;
private readonly Settings _settings;
private readonly string _accessToken;
public GraphApiService(IHttpClientFactory clientFactory, IMemoryCache memoryCache, Settings settings)
{
_clientFactory = clientFactory;
_memoryCache = memoryCache;
_settings = settings;
string graphApiAccessTokenCacheEntry;
// Look for cache key.
if (!_memoryCache.TryGetValue(CacheKeys.GraphApiAccessToken, out graphApiAccessTokenCacheEntry))
{
// Key not in cache, so get data.
var adb2cTokenResponse = GetAccessTokenAsync().GetAwaiter().GetResult();
graphApiAccessTokenCacheEntry = adb2cTokenResponse.access_token;
// Set cache options.
var cacheEntryOptions = new MemoryCacheEntryOptions()
.SetAbsoluteExpiration(TimeSpan.FromSeconds(adb2cTokenResponse.expires_in));
// Save data in cache.
_memoryCache.Set(CacheKeys.GraphApiAccessToken, graphApiAccessTokenCacheEntry, cacheEntryOptions);
}
_accessToken = graphApiAccessTokenCacheEntry;
}
//TODO - Call this method and refresh cache when a new user is added
public async Task<List<Adb2cUser>> GetAllUsers(bool refreshCache = false)
{
List<Adb2cUser> adb2cUsers;
if (refreshCache)
{
_memoryCache.Remove(CacheKeys.Adb2cUsers);
}
// Look for cache key.
if (!_memoryCache.TryGetValue(CacheKeys.Adb2cUsers, out adb2cUsers))
{
// Key not in cache, so get data.
adb2cUsers = new List<Adb2cUser>();
var authProvider = new AuthenticationProvider(_accessToken);
GraphServiceClient graphClient = new GraphServiceClient(authProvider);
var users = await graphClient.Users
.Request()
.GetAsync();
foreach (var user in users)
{
var adb2cUser = new Adb2cUser()
{
Id = Guid.Parse(user.Id),
GivenName = user.GivenName,
FamilyName = user.Surname,
};
adb2cUsers.Add(adb2cUser);
}
// Set cache options.
var cacheEntryOptions = new MemoryCacheEntryOptions()
//Get new values every hour
.SetAbsoluteExpiration(TimeSpan.FromHours(1));
// Save data in cache.
_memoryCache.Set(CacheKeys.Adb2cUsers, adb2cUsers, cacheEntryOptions);
}
return adb2cUsers;
}
private async Task<Adb2cTokenResponse> GetAccessTokenAsync()
{
var client = _clientFactory.CreateClient();
var kvpList = new List<KeyValuePair<string, string>>();
kvpList.Add(new KeyValuePair<string, string>("grant_type", "client_credentials"));
kvpList.Add(new KeyValuePair<string, string>("client_id", _settings.AzureAdB2C.ClientId));
kvpList.Add(new KeyValuePair<string, string>("scope", "https://graph.microsoft.com/.default"));
kvpList.Add(new KeyValuePair<string, string>("client_secret", _settings.AzureAdB2C.ClientSecret));
#pragma warning disable SecurityIntelliSenseCS // MS Security rules violation
var req = new HttpRequestMessage(HttpMethod.Post, $"https://login.microsoftonline.com/{_settings.AzureAdB2C.Domain}/oauth2/v2.0/token")
{ Content = new FormUrlEncodedContent(kvpList) };
#pragma warning restore SecurityIntelliSenseCS // MS Security rules violation
using var httpResponse = await client.SendAsync(req);
var response = await httpResponse.Content.ReadAsStringAsync();
httpResponse.EnsureSuccessStatusCode();
var adb2cTokenResponse = JsonSerializer.Deserialize<Adb2cTokenResponse>(response);
return adb2cTokenResponse;
}
}
public class AuthenticationProvider : IAuthenticationProvider
{
private readonly string _accessToken;
public AuthenticationProvider(string accessToken)
{
_accessToken = accessToken;
}
public Task AuthenticateRequestAsync(HttpRequestMessage request)
{
request.Headers.Add("Authorization", $"Bearer {_accessToken}");
return Task.CompletedTask;
}
}
}
窗口函数：
DENSE_RANK()查看简化的 demo。