我有一个包含10000行和2列INTegers（$duration_time = time() - $start_timestamp;
$actual_qty = $duration_time * $speed_qty_per_second;
）的表。
当MySQL SELECT时，我需要从所选值计算结果。 我做计算：
WHERE $actual_qty > 100我需要从表// will store list of rules
var rules = []
// at least one capital letter rule
rules.one_capital_letter = {
fail_message: 'password needs at least one capital letter',
validate: function(password){
return /[A-Z]/.test(password)
}
}
// at least six letters rule
rules.at_least_six_letters = {
fail_message: 'password needs to have at least 6 characters',
validate: function(password){
return password.length >= 6
}
}
function validate_password(password) {
// goes through all the rules
for(rule in rules) {
if(!rules[rule].validate(password)) {
return {success: false, message: rules[rule].fail_message}
}
}
// return success after all rules are checked
return {success: true, message: 'password validated successfully'}
}
// Test if it works
var test_strings = ['abcd', 'Abcd', 'Abcdef']
for(i in test_strings) {
$('body').append(test_strings[i] + ': ' + validate_password(test_strings[i]).message + '<br>')
}
中选择数据。
很多用户经常会访问这些数据，例如每个用户每秒一次。
存储缓存数据的最佳方法是什么？
答案 0 :(得分：0)
我认为sql解决方案可能很有用
select
id,
start_timestamp,
speed_qty_per_second,
timediff(now(),start_timestamp)),
timediff(now(),start_timestamp))* peed_qty_per_second
from your_table