aliento Posted July 5, 2012 Share Posted July 5, 2012 Hello, i make i web site witharticles and comments . It will have a table comments with the article id. Should i count the comments by a sql query or i should i put an extra field at the articles table with total comments number? Thank you Link to comment https://forums.phpfreaks.com/topic/265237-count-by-sql-query-or-by-php/ Share on other sites More sharing options...
awjudd Posted July 5, 2012 Share Posted July 5, 2012 You should definitely do it in your query rather than on the PHP side. By doing it on the PHP side, you are forcing mysql to prepare a stream with information that will never actually be retrieved, it will only be used with mysql_num_rows, which isn't cost effective. If you are having performance issues, then I would suggest persisting the count, but up until then you should be fine with a COUNT(comment id), especially if indexed correctly. ~awjudd Link to comment https://forums.phpfreaks.com/topic/265237-count-by-sql-query-or-by-php/#findComment-1359285 Share on other sites More sharing options...
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