Php MYSQLI行计算太慢
我正在用MYSQLI的SQL\u CALC\u FOUND\u行计算表中的访问者,但速度很慢。超过15秒。我该怎么做才能让它更快? 我必须提到,我的表是MyISAM,总共有200多万行Php MYSQLI行计算太慢,php,mysql,mysqli,count,rows,Php,Mysql,Mysqli,Count,Rows,我正在用MYSQLI的SQL\u CALC\u FOUND\u行计算表中的访问者,但速度很慢。超过15秒。我该怎么做才能让它更快? 我必须提到,我的表是MyISAM,总共有200多万行 if ($result = $mysqli->query("SELECT SQL_CALC_FOUND_ROWS * FROM visitors_table WHERE visitor_affiliate= 'first user'")) { /* determine number of rows
if ($result = $mysqli->query("SELECT SQL_CALC_FOUND_ROWS * FROM visitors_table WHERE visitor_affiliate= 'first user'")) {
/* determine number of rows result set */
$row_cnt = $result->num_rows;
printf("Result set has %d rows.\n", $row_cnt);
/* close result set */
$result->close();
}
if ($result2 = $mysqli->query("SELECT SQL_CALC_FOUND_ROWS * FROM visitors_table WHERE visitor_affiliate= 'seconduser'")) {
/* determine number of rows result set */
$row_cnt2 = $result2->num_rows;
printf("Result set has %d rows.\n", $row_cnt2);
/* close result set */
$result2->close();
}
if ($result3 = $mysqli->query("SELECT SQL_CALC_FOUND_ROWS * FROM visitors_table WHERE visitor_affiliate= 'thirduser'")) {
/* determine number of rows result set */
$row_cnt3 = $result3->num_rows;
printf("Result set has %d rows.\n", $row_cnt3);
/* close result set */
$result2->close();
}
谢谢你的帮助。。
提前谢谢 确保在“访问者”列上有索引:
CREATE INDEX aff_index ON visitors_table(visitor_affiliate) ;
然后,您需要一个查询来获得三个结果:
SELECT visitor_affiliate, COUNT(*) AS tot FROM visitors_table
WHERE visitor_affiliate IN ( 'firstuser', 'seconduser', 'thirduser')
GROUP BY visitor_affiliate
它通常比三个查询更快
如果仍然需要单独的查询:
SELECT COUNT(*) AS tot FROM visitors_table
WHERE visitor_affiliate IN = 'firstuser'
@anantkumarsingh SQL\u CALC\u FOUND\u ROWS不是一个columnYikes!MyISAM和200万行是痛苦的。您的
visitors\u表
列是某种索引吗?@anantkumarsingh这是一个@Machavity我有一个自动递增的列ID…我还选中了SELECT ID。但是也太慢了…对不起。那次我突然想起了。谢谢试着像SELECT COUNT(*)
和check我做了索引…如何在查询后为每个用户获取数字?从访问者中选择COUNT(*)AS tot\u table='Name'Hi Tim。。我不明白..能给我一个上面已经有的例子中的php例子吗?谢谢。。很抱歉问了这么多问题