SQL - Group by Week Ending

Question

Can someone help me re-write this code to sum the calls by weekending Saturdays?

column headers should be as follows: Week-Ending, Agent ID, Total Calls

SELECT distinct 
cName as "Agent ID"
,CAST(dIntervalStart AS DATE) as "Date"
,SUM(nInternToExternCalls) as "Calls" 

FROM QueueStats

WHERE  
cast(dIntervalStart as date) >= '2019-12-29' and cast(dIntervalStart as date) <= '2020-12-26'

GROUP BY
AQ.cName 
,CAST(dIntervalStart AS DATE)
order by cName

Answer 1

Answer:

SELECT distinct cName as "Agent ID",DATEADD(DAY, -DATEDIFF(DAY, 0, [dIntervalStart]) % 7, [dIntervalStart]) as "Week-Ending",SUM(nInternToExternCalls) as "Calls"

FROM QueueStats

WHERE
cast(dIntervalStart as date) >= '2019-12-29' and cast(dIntervalStart as date) <= '2020-12-26'

GROUP BY AQ.cName,DATEADD(DAY, -DATEDIFF(DAY, 0, [dIntervalStart]) % 7, [dIntervalStart]) order by cName