declare  @BEGIN_MONTH int = 202102, @END_MONTH int = 202102
SELECT 
T1.WHS_ID,
T2.DAY_ID,
T2.MONTH_ID,
SUM(COALESCE(T3.FRCST_SUM, 0))OVER (PARTITION BY T1.BRANCH_ID, T1.FRMT_ID, T2.DAY_ID)FRCST_SUM_DAY,
SUM(COALESCE(T3.FRCST_SUM, 0))OVER (PARTITION BY T1.BRANCH_ID, T1.FRMT_ID, T2.MONTH_ID)FRCST_SUM_MONTH
FROM DBO.T_WHS_SNST T1 CROSS JOIN DBO.T_DAYS T2
LEFT JOIN DBO.T_WHS_FRCST_OPSUM_DAY_SNST T3 ON T3.DAY_ID = T2.DAY_ID AND T1.WHS_ID = T3.WHS_ID
WHERE T2.MONTH_ID BETWEEN @BEGIN_MONTH AND @END_MONTH
go

SELECT OBJECT_NAME(s.object_id) AS object_name, 
    COL_NAME(sc.object_id, sc.column_id) AS column_name,  
    s.name AS statistics_name  
FROM sys.stats AS s 
INNER JOIN sys.stats_columns AS sc  
    ON s.stats_id = sc.stats_id AND s.object_id = sc.object_id  
WHERE --s.name like '_WA%'  
 OBJECT_NAME(s.object_id)  = 'T_WHS_SNST'
ORDER BY 1;

<WaitStats>
              <Wait WaitType="LATCH_EX" WaitTimeMs="2" WaitCount="34" />
              <Wait WaitType="MEMORY_ALLOCATION_EXT" WaitTimeMs="4" WaitCount="6990" />
              <Wait WaitType="CXROWSET_SYNC" WaitTimeMs="15" WaitCount="16" />
              <Wait WaitType="RESERVED_MEMORY_ALLOCATION_EXT" WaitTimeMs="47" WaitCount="89975" />
              <Wait WaitType="SESSION_WAIT_STATS_CHILDREN" WaitTimeMs="51" WaitCount="19" />
              <Wait WaitType="PAGELATCH_SH" WaitTimeMs="138" WaitCount="663" />
              <Wait WaitType="PAGELATCH_UP" WaitTimeMs="267" WaitCount="1359" />
              <Wait WaitType="SOS_SCHEDULER_YIELD" WaitTimeMs="1082" WaitCount="1898" />
              <Wait WaitType="ASYNC_NETWORK_IO" WaitTimeMs="28121" WaitCount="17143" />
              <Wait WaitType="CXPACKET" WaitTimeMs="239733" WaitCount="150099" />
            </WaitStats>