What is faster, counting the number of elements in a table or getting the last record?
We are talking about MySql here.
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What is faster, counting the number of elements in a table or getting the last record?
We are talking about MySql here.
If the table is ISAM, row count is cached and should be returned instantly.
If the table is InnoDB, it can be a little slower.
For more information, see especially this comment:
http://www.mysqlperformanceblog.com/2007/04/10/count-vs-countcol/comment-page-1/#comment-106645