您不关心精确度, 所以不需要使用小数点。 如果您想要只使用整数, 请使用 int。 else, 使用浮点或双倍 。
首先在 PHP 中将它四舍五入不会给您带来任何好处 。 在 PHP 中将其转换为 int 和 double, 比在数据库中存储双倍要慢 。
MySQL 数据类型最适合什么来存储平均评分值, 比如 IMDB 上的电影评分? FLOAT, DEIMAL? 或者如果我将实际数值四舍五入PHP的两位小数点位数,并像INT( 8.323234 - & gt; 8.32 - gt; 832)?
您不关心精确度, 所以不需要使用小数点。 如果您想要只使用整数, 请使用 int。 else, 使用浮点或双倍 。
首先在 PHP 中将它四舍五入不会给您带来任何好处 。 在 PHP 中将其转换为 int 和 double, 比在数据库中存储双倍要慢 。
The most performant, fast and small data type will indeed be INT
.
Sorting, searching, etc. will be the best with this data type, vs. decimal
and/or float
.
I noticed that there were some threads with similar questions, and I did look through them but did not really get a convincing answer. Here s my question: The subquery below returns a Table with 3 ...
<?php $con=mysql_connect("localhost","mts","mts"); if(!con) { die( unable to connect . mysql_error()); } mysql_select_db("mts",$con); /* date_default_timezone_set ("Asia/Calcutta"); $date = ...
我把我的用心从使用QQL转向MySQL。 它与凯科特合作,现在不工作,因为我已经改变,使用MySQL。 这里的错误信息是:
We have a restaurant table that has lat-long data for each row. We need to write a query that performs a search to find all restaurants within the provided radius e.g. 1 mile, 5 miles etc. We have ...
Is it possible in php to return a specific row of data from a mysql query? None of the fetch statements that I ve found return a 2 dimensional array to access specific rows. I want to be able to ...
Our website was developed with a meta tag set to... <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" /> This works fine for M-dashes and special quotes, etc. However, I ...
What are some of the strategies being used for pagination of data sets that involve complex queries? count(*) takes ~1.5 sec so we don t want to hit the DB for every page view. Currently there are ~...
My table looks like person_id | car_id | miles ------------------------------ 1 | 1 | 100 1 | 2 | 200 2 | 3 | 1000 2 | 4 | 500 I need to ...