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Check individual lines against the interval

What is the fastest way to check a set of individual data lines against a from to range ?






resident batch_header;






resident invoice_header;

Table Batch contains a range of invoices asked with a from and to invoice number. 1 row per batch_number

Table Invoices containts my actual invoices. 1 row per batch_number / invoice_number

However, for some reason, table Invoices sometimes does not contain some invoices as they cannot be processed by the interface process.

How can I easily script this ? I have the invoice_number_to and invoice_number_from in table Batch and I want to check which invoice numbers in between the range cannot be found in the table Invoices. Below is an example

Table Batch :

batch_number     invoice_number_from     invoice_number_to

123456               12568                           12574    

Table Invoices:

batch_number     invoice_number

123456               12568

123456               12569

123456               12571

123456               12572

123456               12573

The result I want to get is a table with 12570 and 12574 as these numbers are within the interval but cannot be found in table Invoices

I guess the easiest way might be to transform the Table Batch into a multi row table and then check the generated invoice numbers against the Invoices table, but what is the easiest way to do this ?

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