diff --git a/src/Hangfire.PostgreSql/CountersAggregator.cs b/src/Hangfire.PostgreSql/CountersAggregator.cs
index 2474bd08..31f4844b 100644
--- a/src/Hangfire.PostgreSql/CountersAggregator.cs
+++ b/src/Hangfire.PostgreSql/CountersAggregator.cs
@@ -82,28 +82,26 @@ private string GetAggregationQuery()
     {
       string schemaName = _storage.Options.SchemaName;
       return
-        $@"BEGIN;
+        $"""
+        BEGIN;
 
-INSERT INTO ""{schemaName}"".""aggregatedcounter"" (""key"", ""value"", ""expireat"")	
-      SELECT
-      ""key"",
-      SUM(""value""),
-      MAX(""expireat"")
-      FROM ""{schemaName}"".""counter""
-      GROUP BY
-      ""key""
-      ON CONFLICT(""key"") DO
-        UPDATE
-          SET
-      ""value"" = ""aggregatedcounter"".""value"" + EXCLUDED.""value"",
-      ""expireat"" = EXCLUDED.""expireat"";
+        INSERT INTO "{schemaName}"."aggregatedcounter" ("key", "value", "expireat")	
+        SELECT
+          "key",
+          SUM("value"),
+          MAX("expireat")
+        FROM "{schemaName}"."counter"
+        GROUP BY "key"
+        ON CONFLICT("key") DO UPDATE
+        SET "value" = "aggregatedcounter"."value" + EXCLUDED."value", "expireat" = EXCLUDED."expireat";
+  
+        DELETE FROM "{schemaName}"."counter"
+        WHERE "key" IN (
+          SELECT "key" FROM "{schemaName}"."aggregatedcounter"
+        );
 
-      DELETE FROM ""{schemaName}"".""counter""
-        WHERE
-      ""key"" IN (SELECT ""key"" FROM ""{schemaName}"".""aggregatedcounter"" );
-
-      COMMIT;
-      ";
+        COMMIT;
+        """;
     }
   }
 }
diff --git a/src/Hangfire.PostgreSql/PostgreSqlMonitoringApi.cs b/src/Hangfire.PostgreSql/PostgreSqlMonitoringApi.cs
index 7ea78145..63a5e4c6 100644
--- a/src/Hangfire.PostgreSql/PostgreSqlMonitoringApi.cs
+++ b/src/Hangfire.PostgreSql/PostgreSqlMonitoringApi.cs
@@ -379,12 +379,25 @@ private Dictionary<DateTime, long> GetTimelineStats(string type)
 
     private Dictionary<DateTime, long> GetTimelineStats(IDictionary<string, DateTime> keyMaps)
     {
-      string query = $@"
-        SELECT ""key"", COUNT(""value"") AS ""count"" 
-        FROM ""{_storage.Options.SchemaName}"".""counter""
-        WHERE ""key"" = ANY (@Keys)
-        GROUP BY ""key"";
-      ";
+      string query =
+        $"""
+        WITH "aggregated_counters" AS (
+          SELECT "key", "value"
+          FROM "{_storage.Options.SchemaName}"."aggregatedcounter"
+          WHERE "key" = ANY(@Keys)
+        ), "regular_counters" AS (
+          SELECT "key", "value"
+          FROM "{_storage.Options.SchemaName}"."counter"
+          WHERE "key" = ANY(@Keys)
+        ), "all_counters" AS (
+          SELECT * FROM "aggregated_counters"
+          UNION ALL
+          SELECT * FROM "regular_counters"
+        )
+        SELECT "key", COALESCE(SUM("value"), 0) AS "count"
+        FROM "all_counters"
+        GROUP BY "key"
+        """;
 
       Dictionary<string, long> valuesMap = UseConnection(connection => connection.Query<(string Key, long Count)>(query,
           new { Keys = keyMaps.Keys.ToList() })
@@ -400,10 +413,10 @@ private Dictionary<DateTime, long> GetTimelineStats(IDictionary<string, DateTime
       }
 
       Dictionary<DateTime, long> result = new();
-      for (int i = 0; i < keyMaps.Count; i++)
+      foreach (KeyValuePair<string, DateTime> keyMap in keyMaps)
       {
-        long value = valuesMap[keyMaps.ElementAt(i).Key];
-        result.Add(keyMaps.ElementAt(i).Value, value);
+        long value = valuesMap[keyMap.Key];
+        result.Add(keyMap.Value, value);
       }
 
       return result;
diff --git a/tests/Hangfire.PostgreSql.Tests/CountersAggregatorFacts.cs b/tests/Hangfire.PostgreSql.Tests/CountersAggregatorFacts.cs
new file mode 100644
index 00000000..53402025
--- /dev/null
+++ b/tests/Hangfire.PostgreSql.Tests/CountersAggregatorFacts.cs
@@ -0,0 +1,89 @@
+using System;
+using System.Threading;
+using Dapper;
+using Hangfire.PostgreSql.Tests.Utils;
+using Npgsql;
+using Xunit;
+
+namespace Hangfire.PostgreSql.Tests;
+
+public class CountersAggregatorFacts : IClassFixture<PostgreSqlStorageFixture>
+{
+  private static readonly string _schemaName = ConnectionUtils.GetSchemaName();
+
+  private readonly CancellationToken _token;
+  private readonly PostgreSqlStorageFixture _fixture;
+
+  public CountersAggregatorFacts(PostgreSqlStorageFixture fixture)
+  {
+    CancellationTokenSource cts = new();
+    _token = cts.Token;
+    _fixture = fixture;
+    _fixture.SetupOptions(o => o.CountersAggregateInterval = TimeSpan.FromMinutes(5));
+  }
+
+  [Fact]
+  [CleanDatabase]
+  public void Execute_AggregatesCounters()
+  {
+    UseConnection((connection, manager) => {
+      CreateEntry(1);
+      CreateEntry(5);
+      CreateEntry(15);
+      CreateEntry(5, "key2");
+      CreateEntry(10, "key2");
+
+      manager.Execute(_token);
+
+      Assert.Equal(21, GetAggregatedCounters(connection));
+      Assert.Equal(15, GetAggregatedCounters(connection, "key2"));
+      Assert.Null(GetRegularCounters(connection));
+      Assert.Null(GetRegularCounters(connection, "key2"));
+      return;
+
+      void CreateEntry(long value, string key = "key")
+      {
+        CreateCounterEntry(connection, value, key);
+      }
+    });
+  }
+
+  private void UseConnection(Action<NpgsqlConnection, CountersAggregator> action)
+  {
+    PostgreSqlStorage storage = _fixture.SafeInit();
+    CountersAggregator aggregator = new(storage, TimeSpan.Zero);
+    action(storage.CreateAndOpenConnection(), aggregator);
+  }
+
+  private static void CreateCounterEntry(NpgsqlConnection connection, long? value, string key = "key")
+  {
+    value ??= 1;
+    string insertSql =
+      $"""
+       INSERT INTO "{_schemaName}"."counter"("key", "value", "expireat")
+       VALUES (@Key, @Value, null)
+       """;
+
+    connection.Execute(insertSql, new { Key = key, Value = value });
+  }
+
+  private static long GetAggregatedCounters(NpgsqlConnection connection, string key = "key")
+  {
+    return connection.QuerySingle<long>(
+      $"""
+       SELECT "value"
+       FROM {_schemaName}."aggregatedcounter"
+       WHERE "key" = @Key 
+       """, new { Key = key });
+  }
+
+  private static long? GetRegularCounters(NpgsqlConnection connection, string key = "key")
+  {
+    return connection.QuerySingle<long?>(
+      $"""
+         SELECT SUM("value")
+         FROM {_schemaName}."counter"
+         WHERE "key" = @Key
+         """, new { Key = key });
+  }
+}
diff --git a/tests/Hangfire.PostgreSql.Tests/PostgreSqlMonitoringApiFacts.cs b/tests/Hangfire.PostgreSql.Tests/PostgreSqlMonitoringApiFacts.cs
index f5258b21..4f6f217a 100644
--- a/tests/Hangfire.PostgreSql.Tests/PostgreSqlMonitoringApiFacts.cs
+++ b/tests/Hangfire.PostgreSql.Tests/PostgreSqlMonitoringApiFacts.cs
@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Globalization;
+using System.Linq;
 using Dapper;
 using Hangfire.Common;
 using Hangfire.PostgreSql.Tests.Utils;
@@ -58,6 +59,34 @@ public void GetJobs_MixedCasing_ReturnsJob()
       });
     }
 
+    [Fact]
+    [CleanDatabase]
+    public void HourlySucceededJobs_ReturnsAggregatedStats()
+    {
+      DateTime now = DateTime.UtcNow;
+      string schemaName = ConnectionUtils.GetSchemaName();
+      string key = $"stats:succeeded:{now.ToString("yyyy-MM-dd-HH", CultureInfo.InvariantCulture)}";
+      string arrangeSql =
+        $"""
+        BEGIN;
+        INSERT INTO "{schemaName}"."counter"("key", "value") 
+        VALUES (@Key, 5);
+        INSERT INTO "{schemaName}"."aggregatedcounter"("key", "value") 
+        VALUES (@Key, 7);
+        COMMIT;
+        """;
+      UseConnection(connection => {
+        connection.Execute(arrangeSql, new { Key = key });
+
+        IMonitoringApi monitoringApi = _fixture.Storage.GetMonitoringApi();
+        IDictionary<DateTime, long> stats = monitoringApi.HourlySucceededJobs();
+        Assert.Equal(24, stats.Count);
+
+        long actualCounter = Assert.Single(stats.Where(x => x.Key.Hour == now.Hour).Select(x => x.Value));
+        Assert.Equal(12, actualCounter);
+      });
+    }
+
     private void UseConnection(Action<NpgsqlConnection> action)
     {
       PostgreSqlStorage storage = _fixture.SafeInit();
diff --git a/tests/Hangfire.PostgreSql.Tests/Scripts/Clean.sql b/tests/Hangfire.PostgreSql.Tests/Scripts/Clean.sql
index 68c38dc6..8efe8ea0 100644
--- a/tests/Hangfire.PostgreSql.Tests/Scripts/Clean.sql
+++ b/tests/Hangfire.PostgreSql.Tests/Scripts/Clean.sql
@@ -1,5 +1,6 @@
 SET search_path = 'hangfire';
 
+DELETE FROM hangfire."aggregatedcounter";
 DELETE FROM hangfire."counter";
 DELETE FROM hangfire."hash";
 DELETE FROM hangfire."job";