Question

I have the following database tables

• Master Table – Contains PK Id column for a data range
• Reference Table – A staging table with the data range that has the associated code
• Target Table – Table for which the Id column is to be inserted or updated based on the master and reference table

---

    Reference Table
          Code      From        To
          Abc45     200        400
          Cde78     0          128
          Fcde1     600        898

    Master Table
          Id        From        To
           1        1          100
           2        200        400
           3        0          128
           4        600        898

    Target Table
         Name      id      City      Country      Code
         West               B          CC         Fcde1
         East               V          GG         Cde78 
         North              T          TT         Abc45
         South              Z          YY         Abc45

Thanks In Advance

Answer 1

Try this:

UPDATE  t
SET     t.id = other.id
FROM    Traget t
JOIN    (SELECT r.code, m.id
      FROM Master m
      INNER JOIN Reference r ON m.From = r.From AND m.To = r.To
      ) other
ON      t.Code = other.Code

I used this question Update with inner join? as reference.