I have a query to get all states that a user might have entered, it is :

SELECT DISTINCT customers.bill_state as the_result from customers
UNION SELECT DISTINCT invoice_master.bill_state FROM invoice_master
UNION SELECT DISTINCT customers.ship_state from customers UNION SELECT
DISTINCT invoice_master.ship_state from invoice_master;

Can anyone help speed this query up for large(r) data sets or a
suggest a more efficient way of getting the unique list of states? I'd
sure appreciate it! Thanks!

--
- Mitchell Vincent

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