diff --git a/dao/src/main/java/org/thingsboard/server/dao/timeseries/AggregationTimeseriesDao.java b/dao/src/main/java/org/thingsboard/server/dao/timeseries/AggregationTimeseriesDao.java
index bf6948b1ac..a99ad053b6 100644
--- a/dao/src/main/java/org/thingsboard/server/dao/timeseries/AggregationTimeseriesDao.java
+++ b/dao/src/main/java/org/thingsboard/server/dao/timeseries/AggregationTimeseriesDao.java
@@ -38,23 +38,24 @@ public interface AggregationTimeseriesDao {
         if (query.getAggregation() == Aggregation.NONE) {
             return findAllAsyncWithLimit(tenantId, entityId, query);
         } else {
-            long step = getIntervalGreaterOrEqualsMinAggregationStep(query.getInterval());
-            long stepTs = query.getStartTs();
-            List<ListenableFuture<Optional<TsKvEntry>>> futures = findIntervals(tenantId, entityId, query, step, stepTs);
+            List<ListenableFuture<Optional<TsKvEntry>>> futures = findIntervals(tenantId, entityId, query);
             return getTskvEntriesFuture(Futures.allAsList(futures));
         }
     }
 
-    default List<ListenableFuture<Optional<TsKvEntry>>> findIntervals(TenantId tenantId, EntityId entityId, ReadTsKvQuery query, long step, long stepTs) {
+    default List<ListenableFuture<Optional<TsKvEntry>>> findIntervals(TenantId tenantId, EntityId entityId, ReadTsKvQuery query) {
         List<ListenableFuture<Optional<TsKvEntry>>> futures = new ArrayList<>();
-        while (stepTs < query.getEndTs()) {
-            long startTs = stepTs;
-            long endTs = stepTs + step;
+        long endPeriod = query.getEndTs();
+        long startPeriod = query.getStartTs();
+        long step = query.getInterval();
+        while (startPeriod <= endPeriod) {
+            long startTs = startPeriod;
+            long endTs = Math.min(startPeriod + step, endPeriod + 1);
             long ts = getTsForReadTsKvQuery(startTs, endTs);
             ReadTsKvQuery subQuery = new BaseReadTsKvQuery(query.getKey(), startTs, endTs, ts, 1, query.getAggregation(), query.getOrder());
             ListenableFuture<Optional<TsKvEntry>> aggregateTsKvEntry = findAndAggregateAsync(tenantId, entityId, subQuery, toPartitionTs(startTs), toPartitionTs(endTs), query.getAggregation());
             futures.add(aggregateTsKvEntry);
-            stepTs = endTs;
+            startPeriod = endTs;
         }
         return futures;
     }
diff --git a/dao/src/test/java/org/thingsboard/server/dao/sqlts/AbstractChunkedAggregationTimeseriesDaoTest.java b/dao/src/test/java/org/thingsboard/server/dao/sqlts/AbstractChunkedAggregationTimeseriesDaoTest.java
index 43c2467885..b8a2328fe2 100644
--- a/dao/src/test/java/org/thingsboard/server/dao/sqlts/AbstractChunkedAggregationTimeseriesDaoTest.java
+++ b/dao/src/test/java/org/thingsboard/server/dao/sqlts/AbstractChunkedAggregationTimeseriesDaoTest.java
@@ -39,91 +39,109 @@ import static org.mockito.Mockito.verify;
 public class AbstractChunkedAggregationTimeseriesDaoTest {
 
     final int START_TS = 1;
-    final int LIMIT = 0;
+    final int LIMIT = 1;
     final int END_TS = 3000;
     final String TEMP = "temp";
     final String DESC = "DESC";
     AbstractChunkedAggregationTimeseriesDao tsDao;
 
+    //SOME PRESENT: When we give data with period l-r, program return data in interval [l;r)
+
     @Before
     public void setUp() throws Exception {
         tsDao = mock(AbstractChunkedAggregationTimeseriesDao.class);
         ListenableFuture<Optional<TsKvEntry>> optionalListenableFuture = Futures.immediateFuture(Optional.of(mock(TsKvEntry.class)));
         willReturn(optionalListenableFuture).given(tsDao).findAndAggregateAsync(any(), anyString(), anyLong(), anyLong(), anyLong(), any());
+        willReturn(Futures.immediateFuture(null)).given(tsDao).getTskvEntriesFuture(any());
+        willCallRealMethod().given(tsDao).findAllAsync(any(), any(), any(ReadTsKvQuery.class));
+        willCallRealMethod().given(tsDao).findIntervals(any(), any(), any(ReadTsKvQuery.class));
+        willCallRealMethod().given(tsDao).getTsForReadTsKvQuery(anyLong(), anyLong());
+        willCallRealMethod().given(tsDao).toPartitionTs(anyLong());
+        willCallRealMethod().given(tsDao).findAndAggregateAsync(any(), any(), any(), anyLong(), anyLong(), any());
     }
 
     @Test
     public void givenIntervalNotMultiplePeriod_whenAggregateCount_thanLastIntervalShorterThanOthersAndEqualsEndTs() {
         ReadTsKvQuery query = new BaseReadTsKvQuery(TEMP, START_TS, END_TS, 2000, LIMIT, Aggregation.COUNT, DESC);
-        willCallRealMethod().given(tsDao).findAllAsync(TenantId.SYS_TENANT_ID, TenantId.SYS_TENANT_ID, query);
+        ReadTsKvQuery subQueryFirst = new BaseReadTsKvQuery(TEMP, START_TS, 2001, START_TS + (2001 - START_TS) / 2, LIMIT, Aggregation.COUNT, DESC);
+        ReadTsKvQuery subQuerySecond = new BaseReadTsKvQuery(TEMP, 2001, END_TS, 2001 + (END_TS + 1 - 2001) / 2, LIMIT, Aggregation.COUNT, DESC);
+
         tsDao.findAllAsync(TenantId.SYS_TENANT_ID, TenantId.SYS_TENANT_ID, query);
-        verify(tsDao, times(2)).findAndAggregateAsync(any(), anyString(), anyLong(), anyLong(), anyLong(), any());
-        verify(tsDao, times(1)).findAndAggregateAsync(TenantId.SYS_TENANT_ID, TEMP, 1, 2000, 1000, Aggregation.COUNT);
-        verify(tsDao, times(1)).findAndAggregateAsync(TenantId.SYS_TENANT_ID, TEMP, 2001, END_TS, 2500, Aggregation.COUNT);
+        verify(tsDao, times(2)).findAndAggregateAsync(any(), any(), any(), anyLong(), anyLong(), any());
+        verify(tsDao, times(1)).findAndAggregateAsync(TenantId.SYS_TENANT_ID, TenantId.SYS_TENANT_ID, subQueryFirst, START_TS, 2001, Aggregation.COUNT);
+        verify(tsDao, times(1)).findAndAggregateAsync(TenantId.SYS_TENANT_ID, TenantId.SYS_TENANT_ID, subQuerySecond, 2001, END_TS + 1, Aggregation.COUNT);
     }
 
     @Test
     public void givenIntervalNotMultiplePeriod_whenAggregateCount_thanIntervalEqualsPeriod() {
         ReadTsKvQuery query = new BaseReadTsKvQuery(TEMP, START_TS, END_TS, END_TS, LIMIT, Aggregation.COUNT, DESC);
+        ReadTsKvQuery subQueryFirst = new BaseReadTsKvQuery(TEMP, START_TS, END_TS, START_TS + (END_TS + 1 - START_TS) / 2, LIMIT, Aggregation.COUNT, DESC);
         willCallRealMethod().given(tsDao).findAllAsync(TenantId.SYS_TENANT_ID, TenantId.SYS_TENANT_ID, query);
         tsDao.findAllAsync(TenantId.SYS_TENANT_ID, TenantId.SYS_TENANT_ID, query);
-        verify(tsDao, times(1)).findAndAggregateAsync(any(), anyString(), anyLong(), anyLong(), anyLong(), any());
-        verify(tsDao, times(1)).findAndAggregateAsync(TenantId.SYS_TENANT_ID, TEMP, 1, END_TS, 1500, Aggregation.COUNT);
+        verify(tsDao, times(1)).findAndAggregateAsync(any(), any(), any(), anyLong(), anyLong(), any());
+        verify(tsDao, times(1)).findAndAggregateAsync(TenantId.SYS_TENANT_ID, TenantId.SYS_TENANT_ID, subQueryFirst, START_TS, END_TS + 1, Aggregation.COUNT);
     }
 
     @Test
     public void givenIntervalNotMultiplePeriod_whenAggregateCount_thanIntervalEqualsPeriodMinusOne() {
         ReadTsKvQuery query = new BaseReadTsKvQuery(TEMP, START_TS, END_TS, 2999, LIMIT, Aggregation.COUNT, DESC);
+        ReadTsKvQuery subQueryFirst = new BaseReadTsKvQuery(TEMP, START_TS, END_TS - 2, START_TS + (END_TS - 1 - START_TS) / 2, LIMIT, Aggregation.COUNT, DESC);
+        ReadTsKvQuery subQuerySecond = new BaseReadTsKvQuery(TEMP, END_TS - 1, END_TS, END_TS - 1 + (END_TS + 1 - (END_TS - 1)) / 2, LIMIT, Aggregation.COUNT, DESC);
         willCallRealMethod().given(tsDao).findAllAsync(TenantId.SYS_TENANT_ID, TenantId.SYS_TENANT_ID, query);
         tsDao.findAllAsync(TenantId.SYS_TENANT_ID, TenantId.SYS_TENANT_ID, query);
-        verify(tsDao, times(2)).findAndAggregateAsync(any(), anyString(), anyLong(), anyLong(), anyLong(), any());
-        verify(tsDao, times(1)).findAndAggregateAsync(TenantId.SYS_TENANT_ID, TEMP, 0, 2999, 1499, Aggregation.COUNT);
-        verify(tsDao, times(1)).findAndAggregateAsync(TenantId.SYS_TENANT_ID, TEMP, END_TS, END_TS, END_TS, Aggregation.COUNT);
+        verify(tsDao, times(2)).findAndAggregateAsync(any(), any(), any(), anyLong(), anyLong(), any());
+        verify(tsDao, times(1)).findAndAggregateAsync(TenantId.SYS_TENANT_ID, TenantId.SYS_TENANT_ID, subQueryFirst, START_TS, END_TS, Aggregation.COUNT);
+        verify(tsDao, times(1)).findAndAggregateAsync(TenantId.SYS_TENANT_ID, TenantId.SYS_TENANT_ID, subQuerySecond, END_TS, END_TS + 1, Aggregation.COUNT);
+
     }
 
     @Test
     public void givenIntervalNotMultiplePeriod_whenAggregateCount_thanIntervalEqualsPeriodPlusOne() {
         ReadTsKvQuery query = new BaseReadTsKvQuery(TEMP, START_TS, END_TS, 3001, LIMIT, Aggregation.COUNT, DESC);
+        ReadTsKvQuery subQueryFirst = new BaseReadTsKvQuery(TEMP, START_TS, END_TS, START_TS + (3001 + 1 - START_TS) / 2, LIMIT, Aggregation.COUNT, DESC);
         willCallRealMethod().given(tsDao).findAllAsync(TenantId.SYS_TENANT_ID, TenantId.SYS_TENANT_ID, query);
         tsDao.findAllAsync(TenantId.SYS_TENANT_ID, TenantId.SYS_TENANT_ID, query);
-        verify(tsDao, times(1)).findAndAggregateAsync(any(), anyString(), anyLong(), anyLong(), anyLong(), any());
-        verify(tsDao, times(1)).findAndAggregateAsync(TenantId.SYS_TENANT_ID, TEMP, START_TS, END_TS, 1501, Aggregation.COUNT);
+        verify(tsDao, times(1)).findAndAggregateAsync(any(), any(), any(), anyLong(), anyLong(), any());
+        verify(tsDao, times(1)).findAndAggregateAsync(TenantId.SYS_TENANT_ID, TenantId.SYS_TENANT_ID, subQueryFirst, START_TS, END_TS + 1, Aggregation.COUNT);
     }
 
     @Test
     public void givenIntervalNotMultiplePeriod_whenAggregateCount_thanIntervalEqualsOneMillisecondAndStartTsIsZero() {
-        ReadTsKvQuery query = new BaseReadTsKvQuery(TEMP, START_TS, 0, 1, LIMIT, Aggregation.COUNT, DESC);
+        ReadTsKvQuery query = new BaseReadTsKvQuery(TEMP, 0, 0, 1, LIMIT, Aggregation.COUNT, DESC);
+        ReadTsKvQuery subQueryFirst = new BaseReadTsKvQuery(TEMP, 0, 0, 0, LIMIT, Aggregation.COUNT, DESC);
         willCallRealMethod().given(tsDao).findAllAsync(TenantId.SYS_TENANT_ID, TenantId.SYS_TENANT_ID, query);
         tsDao.findAllAsync(TenantId.SYS_TENANT_ID, TenantId.SYS_TENANT_ID, query);
-        verify(tsDao, times(1)).findAndAggregateAsync(any(), anyString(), anyLong(), anyLong(), anyLong(), any());
-        verify(tsDao, times(1)).findAndAggregateAsync(TenantId.SYS_TENANT_ID, TEMP, 0, 0, 0, Aggregation.COUNT);
+        verify(tsDao, times(1)).findAndAggregateAsync(any(), any(), any(), anyLong(), anyLong(), any());
+        verify(tsDao, times(1)).findAndAggregateAsync(TenantId.SYS_TENANT_ID, TenantId.SYS_TENANT_ID, subQueryFirst, 0, 0 + 1, Aggregation.COUNT);
     }
 
     @Test
     public void givenIntervalNotMultiplePeriod_whenAggregateCount_thanIntervalEqualsOneMillisecondAndStartTsIsOne() {
-        ReadTsKvQuery query = new BaseReadTsKvQuery(TEMP, START_TS, 1, 1, LIMIT, Aggregation.COUNT, DESC);
+        ReadTsKvQuery query = new BaseReadTsKvQuery(TEMP, START_TS, START_TS, 1, LIMIT, Aggregation.COUNT, DESC);
         willCallRealMethod().given(tsDao).findAllAsync(TenantId.SYS_TENANT_ID, TenantId.SYS_TENANT_ID, query);
         tsDao.findAllAsync(TenantId.SYS_TENANT_ID, TenantId.SYS_TENANT_ID, query);
-        verify(tsDao, times(1)).findAndAggregateAsync(any(), anyString(), anyLong(), anyLong(), anyLong(), any());
-        verify(tsDao, times(1)).findAndAggregateAsync(TenantId.SYS_TENANT_ID, TEMP, 1, 1, 1, Aggregation.COUNT);
+        verify(tsDao, times(1)).findAndAggregateAsync(any(), any(), any(), anyLong(), anyLong(), any());
+        verify(tsDao, times(1)).findAndAggregateAsync(TenantId.SYS_TENANT_ID, TenantId.SYS_TENANT_ID, query, START_TS, START_TS + 1, Aggregation.COUNT);
     }
 
     @Test
     public void givenIntervalNotMultiplePeriod_whenAggregateCount_thanIntervalEqualsOneMillisecondAndStartTsIsIntegerMax() {
         ReadTsKvQuery query = new BaseReadTsKvQuery(TEMP, Integer.MAX_VALUE, Integer.MAX_VALUE, 1, LIMIT, Aggregation.COUNT, DESC);
+        ReadTsKvQuery subQueryFirst = new BaseReadTsKvQuery(TEMP, Integer.MAX_VALUE, Integer.MAX_VALUE + 1L, Integer.MAX_VALUE + (Integer.MAX_VALUE + 1L - Integer.MAX_VALUE) / 2L, LIMIT, Aggregation.COUNT, DESC);
         willCallRealMethod().given(tsDao).findAllAsync(TenantId.SYS_TENANT_ID, TenantId.SYS_TENANT_ID, query);
         tsDao.findAllAsync(TenantId.SYS_TENANT_ID, TenantId.SYS_TENANT_ID, query);
-        verify(tsDao, times(1)).findAndAggregateAsync(any(), anyString(), anyLong(), anyLong(), anyLong(), any());
-        verify(tsDao, times(1)).findAndAggregateAsync(TenantId.SYS_TENANT_ID, TEMP, Integer.MAX_VALUE, Integer.MAX_VALUE, Integer.MAX_VALUE, Aggregation.COUNT);
+        verify(tsDao, times(1)).findAndAggregateAsync(any(), any(), any(), anyLong(), anyLong(), any());
+        verify(tsDao, times(1)).findAndAggregateAsync(TenantId.SYS_TENANT_ID, TenantId.SYS_TENANT_ID, subQueryFirst, Integer.MAX_VALUE, Integer.MAX_VALUE + 1L, Aggregation.COUNT);
     }
 
     @Test
     public void givenIntervalNotMultiplePeriod_whenAggregateCount_thanIntervalEqualsBigNumber() {
         ReadTsKvQuery query = new BaseReadTsKvQuery(TEMP, START_TS, END_TS, Integer.MAX_VALUE, LIMIT, Aggregation.COUNT, DESC);
+        ReadTsKvQuery subQueryFirst = new BaseReadTsKvQuery(TEMP, START_TS, END_TS, START_TS + (END_TS + 1 - START_TS) / 2, LIMIT, Aggregation.COUNT, DESC);
         willCallRealMethod().given(tsDao).findAllAsync(TenantId.SYS_TENANT_ID, TenantId.SYS_TENANT_ID, query);
         tsDao.findAllAsync(TenantId.SYS_TENANT_ID, TenantId.SYS_TENANT_ID, query);
-        verify(tsDao, times(1)).findAndAggregateAsync(any(), anyString(), anyLong(), anyLong(), anyLong(), any());
-        verify(tsDao, times(1)).findAndAggregateAsync(TenantId.SYS_TENANT_ID, TEMP, START_TS, END_TS, 1500, Aggregation.COUNT);
+        verify(tsDao, times(1)).findAndAggregateAsync(any(), any(), any(), anyLong(), anyLong(), any());
+        verify(tsDao, times(1)).findAndAggregateAsync(TenantId.SYS_TENANT_ID, TenantId.SYS_TENANT_ID, subQueryFirst, START_TS, END_TS + 1, Aggregation.COUNT);
     }
 
     @Test
@@ -132,9 +150,10 @@ public class AbstractChunkedAggregationTimeseriesDaoTest {
         ReadTsKvQuery query = new BaseReadTsKvQuery(TEMP, START_TS, END_TS, intervalTs, LIMIT, Aggregation.COUNT, DESC);
         willCallRealMethod().given(tsDao).findAllAsync(TenantId.SYS_TENANT_ID, TenantId.SYS_TENANT_ID, query);
         tsDao.findAllAsync(TenantId.SYS_TENANT_ID, TenantId.SYS_TENANT_ID, query);
-        verify(tsDao, times(1000)).findAndAggregateAsync(any(), anyString(), anyLong(), anyLong(), anyLong(), any());
-        for (long i = START_TS; i < END_TS; i += intervalTs) {
-            verify(tsDao, times(1)).findAndAggregateAsync(TenantId.SYS_TENANT_ID, TEMP, i, i + intervalTs, i, Aggregation.COUNT);
+        verify(tsDao, times(1000)).findAndAggregateAsync(any(), any(), any(), anyLong(), anyLong(), any());
+        for (long i = START_TS; i <= END_TS; i += intervalTs) {
+            ReadTsKvQuery querySub = new BaseReadTsKvQuery(TEMP, i, i + intervalTs, i + (i + intervalTs - i) / 2, LIMIT, Aggregation.COUNT, DESC);
+            verify(tsDao, times(1)).findAndAggregateAsync(TenantId.SYS_TENANT_ID, TenantId.SYS_TENANT_ID, querySub, i, i + intervalTs, Aggregation.COUNT);
         }
     }
 }
\ No newline at end of file