How to get minimum date by each records from multiple records

Question

I would like to get the minimum date of each record in my table having multiple entry of date with one primary key. Take a look at my table:

   CaseNo     Entry_         


        

Answer 1

try this

SELECT
  CaseNo,
  Entry_date,
  (SELECT MIN(Entry_date) FROM Cases subc WHERE subc.CaseNo=c.CaseNo GROUP BY CaseNo) AS MinEntryDate
FROM Cases c