用php在mysql表中获取记录总数的最佳方法是什么?

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从大表中选择记录总数的最有效方法是什么?目前，我只是在做

Whats the most efficient way of selecting total number of records from a large table? Currently, Im simply doing

$result = mysql_query("SELECT id FROM table"); $total = mysql_num_rows($result)

有人告诉我，如果表中有很多记录，这不是非常有效或快速.

I was told this was not very efficient or fast, if you have a lot of records in the table.

推荐答案

您被正确告知. mysql可以为您完成这项工作，效率更高.

You were told correctly. mysql can do this count for you which is much more efficient.

$result = mysql_query( "select count(id) as num_rows from table" ); $row = mysql_fetch_object( $result ); $total = $row->num_rows;