Question

I have two tables

Created_Labels:

• IF label_ID_from = label_ID_to (it means it has been only one label created), in column label_number is number of created label.

• IF label_ID_from <> label_ID_to (more labels was created), in column label_number is NULL and in next two columns is interval of created labels with ID from table bellow.

Labels (list of existing lables):

How can I get the complete list of created label_numbers (get labels with ID 105, 110, 111, 112..120, 200, 201, 202..210, 394, 554)?

Answer 1

SELECT 
      L.ID
    , L.label_number
FROM
      Labels L
  JOIN
      Created_Labels CL
    ON
      L.ID BETWEEN CL.label_ID_from
               AND CL.label_ID_to