Hello All,
The original source of data will be a table of persons with their member ship:
Description StartDate EndDate
---------------------------------------------------
18 Smith John Poker Club 01/01/2009 NULL
18 Smith John Library 05/01/2009 18/01/2009
18 Smith John Gym 10/01/2009 28/01/2009
26 Adams Jane Pilates 03/01/2009 16/02/2009
The challenge will be to find each intersection of membership date ranges for each person and produce for this each unique range:
- a new line with the StartDate and EndDate of the range
- Concatenate in the description the descriptions of the memberships for this range with:
- “/” as separator
- order by membership StartDate
This is the table of results expected:
18 Smith John Poker Club 01/01/2009 04/01/2009 18 Smith John Poker Club / Library 05/01/2009 09/01/2009 18 Smith John Poker Club / Library / Gym 10/01/2009 18/01/2009 18 Smith John Poker Club / Gym 19/01/2009 28/01/2009 18 Smith John Poker Club 29/01/2009 NULL 26 Adams Jane Pilates 03/01/2009 16/02/2009
Sample Script:
SET DATEFORMAT dmy DECLARE @Membership TABLE ( PersonID int, Surname nvarchar(16), FirstName nvarchar(16), Description nvarchar(16), StartDate datetime, EndDate datetime) INSERT INTO @Membership VALUES (18, 'Smith', 'John', 'Poker Club', '01/01/2009', NULL) INSERT INTO @Membership VALUES (18, 'Smith', 'John', 'Library', '05/01/2009', '18/01/2009') INSERT INTO @Membership VALUES (18, 'Smith', 'John', 'Gym', '10/01/2009', '28/01/2009') INSERT INTO @Membership VALUES (26, 'Adams', 'Jane', 'Pilates', '03/01/2009', '16/02/2009')
Note:Make sure that your solution uses a single query that starts either with "SELECT" or "WITH" or ";WITH".
Can you please share suggestions.
Regards,
Vaishu