Question

I need to update a table column white the same data that currently exists in that column plus add data from one column from another table. The tables in question are in 3N.

I am attempting to do a complex update by concanting data from one column in a principle table into a column in an existing table.

update Catelog.Component SET Name = p.Number 
          FROM Catelog.Part p                                JOIN 
               Catelog.ComponentPart cp ON p.ID = cp.PartID  JOIN 
               Catelog.Component c      ON cp.ComponentID = c.ID  
          where p.BrandID = 1003
          AND ct.Name='Door' + '|'+ Name;

If you’ll notice the Name column that I am setting I am resetting the data that already exists in that column plus prefixing the PartNumber.

Basically I need to prefix the existing data in the Name column with the part number from the part table.

Right now SQL is giving me the ambiguous error.

Plus, I do not think that the rows would be set correctly the way I’ve got this update structured.

What is the best way to do joined updates like this?

Answer 1

Update  C
Set C.Name = CAST(p.Number as varchar(10)) + '|'+ C.Name
FROM Catelog.Component C
JOIN Catelog.ComponentPart cp     
    ON p.ID = cp.PartID  
JOIN Catelog.Component c  
    ON cp.ComponentID = c.ID  
where p.BrandID = 1003
AND ct.Name='Door' + '|'+ C.Name;

I’m not sure about where last Name belongs (from which table, it’s not clear)