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Check for duplicates in a MySQL database


Pythondesigns

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you can group them by url:

"select count(*) as count, url from table group by url";

returned results contains 2 column: count and url.
count contain the number of repetition of url.

you can use this result to find out the id contain repeated url:
"select id where url='repeated_url'";
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[quote author=hvle link=topic=100562.msg396988#msg396988 date=1152884904]
you can group them by url:

"select count(*) as count, url from table group by url";

returned results contains 2 column: count and url.
count contain the number of repetition of url.

you can use this result to find out the id contain repeated url:
"select id where url='repeated_url'";
[/quote]

To get just the duplicates

"select count(*) as count, url from table group by url having count > 1";
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