Question

Dear All, please help me since I’m newbie in SQL Server. I have a select query that currently produces the following results:

DoctorName

Team

Visit date

dr. As

A

5

dr. Sc

A

4

dr. Gh B 6

dr. Nd C 31

dr As A 7

Using the following query:
SELECT d.DoctorName, t.TeamName, ca.VisitDate FROM cActivity AS ca
INNER JOIN doctor AS d ON ca.DoctorId = d.Id
INNER JOIN team AS t ON ca.TeamId = t.Id
WHERE ca.VisitDate BETWEEN ‘1/1/2010’ AND ‘1/31/2010’

I want to produce the following:

DoctorName Team 1 2 3 4 5 6 7 … 31 Visited
dr. As   A                             x    x …      2 times
dr. Sc   A                          x          …      1 times
dr. Gh   B                                  x …      1 times
dr. Nd   C                                  … x      1 times

Answer 1

Use:

  SELECT d.doctorname,
         t.teamname,
         MAX(CASE WHEN ca.visitdate = 1 THEN 'x' ELSE NULL END) AS 1,
         MAX(CASE WHEN ca.visitdate = 2 THEN 'x' ELSE NULL END) AS 2,
         MAX(CASE WHEN ca.visitdate = 3 THEN 'x' ELSE NULL END) AS 3,
         ...
         MAX(CASE WHEN ca.visitdate = 31 THEN 'x' ELSE NULL END) AS 31,
         COUNT(*) AS visited
    FROM CACTIVITY ca
    JOIN DOCTOR d ON d.id = ca.doctorid 
    JOIN TEAM t ON t.id = ca.teamid
   WHERE ca.visitdate BETWEEN '1/1/2010' AND '1/31/2010'
GROUP BY d.doctorname, t.teamname