Can you show me the invoice numbers which are created before 1989-09-03?
select invoice_number from invoices where invoice_date < "1989-09-03"
What about the invoice numbers which are created after 2007-12-25?
select invoice_number from invoices where invoice_date > "2007-12-25"
Hmm, can you list the invoice numbers which are created before 1989-09-03 or after 2007-12-25?
select invoice_number from invoices where invoice_date < "1989-09-03" or invoice_date > "2007-12-25"