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Old 08-08-2005, 08:42 PM
Marco van Herwaarden Marco van Herwaarden is offline
 
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That still can all be calculated and designed if you know what you are doing. That is not an excuse. Just make a study of how MySQL optimizer make it's choices, then see what indexes are available, what the distribution of values is among the columns that you are using for join/where/order, the number of rows in each table, the average length of the data in these columns, etc.. You can predict pretty good if somehting is optimized or not.
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