how can we get last week start and end date in sql code example

Example 1: sql last week

select min(date), max(date)
from calendar
where week = datepart(week, getdate() - 7)
and year = datepart(year, getdate() - 7)

Example 2: date sql get the last week count

select * from dt_table where  `date` >= DATE_SUB(CURDATE(), INTERVAL 7 DAY)