finding missing values, mysql??
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        Published on 2011-01-04T04:35:50Z
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i am using mysql database i have a table called sales its primary key is sales_id
-------------------------------------
sales_id | invoice_id | 
-------------------------------------
1    |  147 
2    |  148
3    |  150
for sales-id 3 the invoice is supposed to be 149. i want to know which numbers are missing from invoice_id (i start invoice_id is 147 and end invoice_id is 4497). The invoice_id had no relation with sales_id
is it possible to know which numbers are missing from invoice_id, using some queries??
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