我有张桌子
id, turnover, qty
我想询问一下
select sum turnover, sum qty, (sum turnover) div (sum qty) by id from Table
然而,从除法得到的值似乎是int,并显示0(因为单位价格比1小得多)。我试着把结果投进浮子里,但那没有帮助。
select sum turnover, sum qty, `float$(`float$(sum turnover) div `float$(sum qty)) by id from Table.
我怎样才能得到花车作为回报?另外,作为一个附带问题。如何命名列(与selec
因此,我试图在文件中缓存数组,并将其用于其他地方。
import.php
// Above code is to get each line in CSV and put in it in an array
// (1 line is 1 multidimensional array) - $csv
$export = var_export($csv, true);
$content = "<?php \$data=" . $export . ";?>";
$target_path1 = "/var/www/html/Samples/t
我想知道iowait时间是否在psutil.cpu_percent()中计算,所以编写如下代码来测试
#cat test.py
import os
import psutil
import time
p = psutil.Process(os.getpid())
start = time.time()
times_before_workload = p.cpu_times()
# this function return cpu_percent between two call. so we have to call it once before workload
percent_be