Question

I have a 3 table SQLServer Database.

Project ProjectID ProjectName  Thing ThingID ThingName  ProjectThingLink ProjectID ThingID CreatedDate 

When a Thing is ascribed to a Project an entry is put in the ProjectThingLink table. Things can move between Projects. The CreatedDate is used to know which Project a Thing was last moved too.

I am trying to create a list of all Projects with which Things are currently linked to them, but my brain is failing.

Is there an easy way of doing this?

Answer 1

select p.projectName, t.ThingName from projects p join projectThingLink l on l.projectId = p.projectId join thing t on t.thingId = l.thingId where l.createdDate = ( select max(l2.createdDate)   from projectThingLink l2   where l2.thingId = l.thingId ); 

NOTE: Corrected after comment