I have a database table that has one row entered every day by the user. If the user skips a day, it throws off our monthly totals. Assume a table with four columns: id (which is the key), date (yyyy-mm-dd), data1 (int), data2 (int) Is there a way to say "Select the first missing date in the last 30 days from this table"? I know I can select all the rows, ordered by date, and loop through them with PHP to look for first one that's missing. But that seems inefficient. And I know that once in place, in theory there should never be any more missing dates if I just grab the max date and add one. But I don't want to do that. I want the page to be SURE there are no missing dates in the last 30 days. Thanks, Mark
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