Write a query to return the date and day of the week of the first day...

Write a query to return the date and day of the week of the first day of the month two years from today.

If today is 10/16/20, then the expect output is 10/01/2022 and the day of the week is thursday.

I am using postgresql.

Expert Solution

first of all 10/01/2022 ---> oct /01/2022 is saturday. not thursday.

try the below query

----------------------------------------------

with daynumber as (select date_trunc('month', current_date + interval '2 years')as date,extract(isodow from date_trunc('month', current_date + interval '2 years')) -  0 daynumber ),
week as(select CASE 
         WHEN daynumber.daynumber =1 THEN 'Monday'
         WHEN daynumber.daynumber=2 THEN 'Tuesday'
         WHEN daynumber.daynumber=3 THEN 'Wednesday'
         WHEN daynumber.daynumber=4 THEN 'Thursday'
         WHEN daynumber.daynumber=5 THEN 'Friday'
         WHEN daynumber.daynumber=6 THEN 'Saturday'
         WHEN daynumber.daynumber=7 THEN 'Sunday'
     ELSE 'other'
   END from daynumber ) 
 select *from daynumber,week;

-----------------------------------

output

venereology answered 5 months ago

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