select count() where后面不会了




$todayzero = strtotime(date('Y-m-d',time()));
        //return  $todayzero;
        $today = pdo_fetchcolumn('select count(*) from '.tablename('wc_nongplus_count'). "where uniacid=:uniacid and (createtime>=$todayzero and createtime<=:createtime)",array(':uniacid'=>$uniacid,':createtime'=>time()));
        $counts = pdo_fetchcolumn('select count(*) from '.tablename('wc_nongplus_count'). "where uniacid=:uniacid",array(':uniacid'=>$uniacid));


time<当前时间戳 and time > 今天凌晨时间戳-1
time<日期结束次日凌晨时间戳 and time > 日期开始凌晨时间戳-1
建议增加一个冗余字段 day 20190320 这种格式的 这种格式的话进行查询压力要小特别多

php—solitude 回复51digit: 解决了的话结下贴 不然之后回答的人会少 基本看结帖率特别低的很少有人回答
大约一年之前 回复
skywesdy 嗯嗯,谢谢你了,参考性很强
大约一年之前 回复

$todaystart = strtotime(date(‘Y-m-d’.’00:00:00′,time()));
$todayend = strtotime(date(‘Y-m-d’.’00:00:00′,time()+3600*24));
select count() where ctime > $todaystart and ctime < $todayend

skywesdy 谢谢您,思路基本和您这个差不多
大约一年之前 回复

select count(*) from orders where createdate>UNIX_TIMESTAMP(CAST(SYSDATE()AS DATE))

php—solitude 在sql where条件内使用sql函数 是不会触发索引的吧
大约一年之前 回复
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帮助MySQL Unix时间戳查询

<div class="post-text" itemprop="text"> <p>I am trying to create a custom MySQL for use with the Expression Engine CMS. The purpose of the query is to display events that are happening today or in the future.</p> <p>The problem is that the EE field type that allows you to put in the date and converts it into a unix timestamp. If I pick the 26th July it puts in the date value "25th July 23:00".</p> <p>As you see from my query below it almost works but I need to add 24 hours onto the values that are used in the conditional part of the statement. I want events that occur on the day "for example today 25th July" to be displayed up until 23:00 hours that day then be removed. I almost have it I am just stuck on how to add 24 hours to the conditional.</p> <pre><code> SELECT t.entry_id, t.title, t.url_title, d.field_id_13 AS event_lineup, d.field_id_14 AS event_details, d.field_id_15 AS event_day, d.field_id_16 AS event_flyer_front, d.field_id_17 AS event_flyer_back, d.field_id_18 AS event_facebook, d.field_id_12 AS event_date FROM `exp_weblog_titles` AS t NATURAL JOIN `exp_weblog_data` AS d WHERE d.weblog_id = 5 AND CAST(d.field_id_12 AS UNSIGNED) &gt;= (unix_timestamp(Now())) ORDER BY d.field_id_12 ASC </code></pre> </div>

Mysql Unix时间戳存储?

<div class="post-text" itemprop="text"> <p>I got a bit of a problem here. My database stores unix timestamps as a string <code>2011-09-01 20:22:36</code> and I need it as a Unix Timestamp ########### so I can compare it using a &gt; then symbol. But I also need to have it automatically set the timestamp on update (<code>ON UPDATE CURRENT TIMESTAMP</code>) as well as have a <code>default of the timestamp</code> <strong>which is not really that important cause I can do that in PHP if I need to.</strong></p> <p>How can I do this? <code>timestamp</code> is now a date/time combo string and not a integre so I cannot compare it?</p> <p>My comparison string is</p> <p><code>$sql = sprintf("SELECT nid, field_date_value, field_movie_location_value FROM content_type_mobile_event WHERE updated&lt;'%s'", $vid);</code></p> <p>Incase anyone is wondering.</p> </div>


<div class="post-text" itemprop="text"> <p>I have a strange problem . I am trying to insert some values to database with respective date . In HTML form, the date format is mm/dd/yyyy format. I converted this format to mysql <code>yyyy-mm-dd</code> format using the following PHP <a href="">(from stackoverflow answer)</a>:</p> <pre><code>echo $date1 = str_replace("/","-",$_POST['date']); echo $date = date('Y-m-d', strtotime($date1)); </code></pre> <p>But the above echo , when I run the code it shows like this: <code>07-30-2012 1970-01-01</code></p> </div>

Mysql Timestamp 无法时间戳查询

在做SQL优化时,发现时间查询上耗时较大,想优化一下。 字段类型是Timestamp 查询SQL: 工作正常SQL: SELECT count(*) FROM TRADE_RECORD t where UNIX_TIMESTAMP(t.TRADE_TIME) BETWEEN 1462723200 AND 1462723200; 工作失败SQL: SELECT count(*) FROM TRADE_RECORD t where t.TRADE_TIME BETWEEN 1462723200 AND 1462723200; 请教为什么下面的SQL会失败,我给timestamp做了索引,如果用上面正常的SQL的话索引好像没有什么效果,下面失败的SQL的话,查询很快,但结果是0,得不到数据。


<div class="post-text" itemprop="text"> <p>PHP has <code>time()</code>, MySQL has <code>UNIX_TIMESTAMP()</code>.</p> <p>Will these always be equal, on a given machine?</p> <p>I expect the answer is normally yes, but are there any edge cases?</p> </div>


<div class="post-text" itemprop="text"> <p>I have an issue whereby a client has some legacy environment (IIS 6 / PHP 5.0.1) and keeps getting the following error: </p> <blockquote> <p>Warning: date() []: Windows does not support dates prior to midnight (00:00:00), January 1, 1970 in" when using the date() function.</p> </blockquote> <p>I need to find a way to convert my UNIX timestamp, i.e "1293559200" (28th of Dec, 2010) to something I can then pass on as a correct date.</p> </div>

PHP Unix时间戳在一天内转换一小时

<div class="post-text" itemprop="text"> <p>I'm working on an existing website which uses Unix timestamps for saving date/time information (as an <code>INT UNSIGNED</code> column in MySQL).</p> <p>If a user enters a date of 26th March 2017 with any time (the start of British Summer Time, when UK clocks go forward by an hour), when this is saved to the database and then extracted and displayed using <code>date</code>, the time shown is one hour greater than that entered by the user. For example, <code>2017-03-26 20:00:00</code> when saved becomes <code>2017-03-26 21:00:00</code> when displayed. However, this only happens for 26th March 2017 - dates before and after show the same time as entered by the user.</p> <p>I could understand if this was happening for every day after 26th March but I have no idea why it would only happen on one day. The site didn't have this problem last year either at the beginning or end of British Summer Time.</p> <p>The default timezone is set to Europe/London (using <code>date_default_timezone_set('Europe/London');</code>) in a file which is included on every page and <code>phpinfo</code> also shows Europe/London as the default timezone.</p> <p>The server time is correct and the <code>date</code> command gives me: <code>Fri 17 Mar 08:55:13 GMT 2017</code>.</p> <p>The server has recently been upgraded which resulted in a version bump from PHP 5.3.x to 5.6.x so that is the only thing I can think of which may have caused this issue.</p> <p>Is there anything I can do to resolve this, apart from using DATETIME fields (a longer term goal, but not something that can be done in a few days) or subtracting 3600 seconds from timestamps if their date is 26/03/2017 (gets very messy and there are too many places where timestamps are used for that to be practical).</p> </div>


<div class="post-text" itemprop="text"> <p>I am currently copying all rows from Table1 to Table2 each day. Table2 is a 7 day archive of what Table1 contains each day. On average there are 150,000 rows to move over each day.</p> <p>Table1 </p> <pre><code>id | name | category | image | description | link </code></pre> <p>Table2 </p> <pre><code>id | name | link | date </code></pre> <p>To do this I use PHP to select all rows in Table1:</p> <p><code>SELECT name, category, link FROM Table1</code></p> <p>Then I loop through each one and insert it into Table2:</p> <pre><code>INSERT INTO Table2 SET name = ''.$row["name"].'', link = ''.$row["link"].'', date = time() </code></pre> <p><code>time()</code> is stored as an int(11) in the database. Can anybody advise if this is there is a better or more efficient way of doing this?</p> </div>

将英国式日期和时间转换为UNIX时间戳(PHP> 5.3)

<div class="post-text" itemprop="text"> <p>It is worth mentioning I'm using PHP 5.2 so can't use the DateTime class.</p> <p>I have the following code:</p> <pre><code>$date_begin = mysql_real_escape_string($_POST['dateBegin']); $date_end = mysql_real_escape_string($_POST['dateEnd']); </code></pre> <p>Imagine they are now </p> <pre><code>$date_begin = "28/02/2015"; $date_end = "22:00:00"; </code></pre> <p>How can I convert this into a php/unix timestamp?</p> <p>Thanks</p> </div>


<div class="post-text" itemprop="text"> <p>I want to check my expiry date with current time using NOW() function</p> <p>Process: I am adding reminder date time with jQuery UI Date time picker and its giving me time stamp like this <strong><em>2015-07-9 14:36</em></strong> it does not have any seconds but my created_at contain complete Unix time stamp.</p> <p>But using the below command doesn't give me any result. MySQL date time set with PC date and time.</p> <p><strong>MySql Code:</strong></p> <pre><code>SELECT * FROM `tbl_web_contact_signups` WHERE `expiry` = NOW() </code></pre> <p><strong>Database:</strong></p> <pre><code>+----+-----------------+---------------------+ | ID | expiry | created_at | +----+-----------------+---------------------+ | 1 | 2015-07-9 14:36 | 2015-07-01 11:22:24 | +----+-----------------+---------------------+ | 2 | 2015-07-9 14:38 | 2015-07-01 11:22:24 | +----+-----------------+---------------------+ | 3 | 2015-07-9 14:40 | 2015-07-01 11:22:24 | +----+-----------------+---------------------+ | 4 | 2015-07-9 14:50 | 2015-07-01 11:22:24 | +----+-----------------+---------------------+ </code></pre> <p>Expiry column type <strong>varchar</strong></p> <p><strong>PS:</strong> i am creating reminders and want to check how many reminders i have today or this time.</p> </div>


<div class="post-text" itemprop="text"> <p>I have a service that shows a specific button when a session is "ready", i.e. 15 minutes beforehand and through the session.</p> <p>I am doing this by pulling up all recently requested sessions, analyzing their timestamps, and then pulling out a specific ID if that session is upcoming. Here is the code:</p> <pre><code>$session_check_query = "SELECT * FROM requested_sessions WHERE username_t = '{$_SESSION['username']}'"; $session_check_process = mysql_query($session_check_query); date_default_timezone_set($_SESSION['timezone']); $current_time = time(); while ($sessions = mysql_fetch_array($session_check_process)) { if ($sessions['time_from_t'] - $current_time &lt;= 900 &amp;&amp; $current_time - $sessions['time_from_t'] &gt; 0 &amp;&amp; $sessions['accepted'] == 1) { $session_id = $sessions['id']; } } </code></pre> <p>The problem is that when I echo $session_id in the loop it will output 1, 2, 3, 4. This means that it feels that all of my sessions in the database meet this criteria when they don't only one does.</p> <p>Is there a problem with this code? time_from_t is in UNIX format.</p> </div>


<div class="post-text" itemprop="text"> <p>I'm writing code to subtract two dates. It is for a contract type thingy, where user gets to see the number of days left for his contract to complete. Something like <code>start_date_time="today"</code> and <code>end_date_time=y</code> where the value of <code>y</code> is retrieved from the database (DATETIME type). It is in the mysql datetime format (<code>yyyy-mm-dd HH:mm:ss</code>).</p> <pre><code>&lt;?php include_once '../include/connections.php'; $id =$_REQUEST['uid']; $result= mysql_query("SELECT * FROM data WHERE uid = '$id'"); $test = mysql_fetch_array($result); echo $test[14]; echo "&lt;br /&gt;&lt;br /&gt;"; $today=time(); $enddate=strtotime('$test[14]'); $timediff = $enddate - $today; $days=intval($timediff/86400); $remaining=$timediff%86400; $hours=intval($remaining/3600); $remaining=$remaining%3600; $mins=intval($remaining/60); $secs=$remaining%60; echo "&lt;br&gt;".$days.' days '.$hours.' hours '.$mins.' minutes and '.$secs.' seconds.'; ?&gt; </code></pre> <p>When I <code>echo $test[14];</code>, I get the date and time as stored in the database which is (<code>2012-09-26 00:00:00</code>)</p> <p>When i <code>echo $today;</code> then i get it in this format <code>1348381896</code>. Now, how do i convert this format to the one retrieved from the db so that i can subtract the 2 dates and get the number of days and time left?</p> </div>


<div class="post-text" itemprop="text"> <p>How can we check that a string considered to be a MySQL TIMESTAMP is actually valid? The format used is:</p> <p><code>YYYY-MM-DD HH:MM:SS[.fraction]</code> where "fraction" has 3 digits.</p> <p>For example <code>2016-03-28 12:17:30.022</code> should be valid. Preferably I would like to avoid regex and use <code>time.Parse()</code> but any other suggestion is welcome.</p> </div>

用PHP提取服务器时间并存储在MySQL中 - Unix时间戳好吗?

<div class="post-text" itemprop="text"> <p>All,</p> <p>I'm trying to decide how to deal with time in a project which relies on (server) time intervals (in short, some content is available after user completed a specific action at least n hours before). Right now, it seems like the easiest option would be to extract the Unix time stamp with <code>time()</code> and store it as is in MySQL.</p> <p>Any reason why this is not a good idea? Any gotcha I need to be aware of? Performance impact?</p> </div>

检查存储在mysql db中的unix时间戳的月份名称(使用php)

<div class="post-text" itemprop="text"> <p>Having trouble working out how to do the following - I want to list all the events for a given month, with each event having a date stored as a unix timestamp in the database. In my sql query, I have to manipulate the timestamp so that i can check if the date is in the same month as the month string i'm comparing against, e.g "october". What would the best way to go about this be? Thanks</p> </div>


<div class="post-text" itemprop="text"> <p>I don't understand why hours of searching have left me empty handed. The situation is this: my site users can set a date and time for an event to begin. That date and time are stored in the db as a timestamp. I want to display a countdown for them. So, I query the db</p> <pre><code>SELECT TIMESTAMPDIFF(SECOND, NOW(), start) FROM events WHERE eid = '110'; </code></pre> <p>That returns the number of second remaining until the event is set to begin. All I want is to be able to output, in a <code>span</code>, the number of days, hours, minutes, &amp; seconds. </p> <p>Here's the javascript I have thus far:</p> <p>After reading the comments, searching more, and hacking a few things together, this is my updated code:</p> <pre><code>&lt;span id="countdown-1"&gt;&lt;?php echo $timeToEvent; ?&gt;&lt;/span&gt; </code></pre> <p>(If there's a more appropriate way to to get my "seconds 'til event" value to the script, please correct me.)</p> <pre><code>secs = parseInt(document.getElementById('countdown-1').innerHTML,10); setTimeout("countdown('countdown-1',"+secs+")", 1000); function countdown(id, timer){ function pad(num) { return num &gt; 9 ? num : '0'+num; }; timer--; days = Math.floor( timer / 86400 ), hours = Math.floor( timer / 3600 ), mins = Math.floor( timer / 60 ), secs = Math.floor( timer ), dd = days, hh = hours - days * 24, mm = mins - hours * 60, ss = secs - mins * 60; clock = dd + ' days ' + pad(hh) + ':' + pad(mm) + ':' + pad(ss) ; document.getElementById(id).innerHTML = clock; if ( timer &gt; 0 ) { setTimeout("countdown('" + id + "'," + timer + ")", 1000); } else { window.location.reload(true); } } </code></pre> <p><a href="" rel="nofollow"></a></p> <p>This code works. However, as I wrote above, I <strong>don't know if I ought to be passing the php variable <code>$timeToEvent</code> to the script more directly</strong>. It is slightly annoying that the actual number of seconds appears in the span for about 1 second before the javascript changes it to what I want to see. (By the way, I'm not overly concerned about accuracy in this context; I don't mind the time drift.)</p> </div>


<div class="post-text" itemprop="text"> <p>I have a date stored in the database. The date is 2017-03-01. The field is a "date"-field.</p> <p>When I use </p> <pre><code>DATE_FORMAT(orderdate, '%d.%m.%Y') as mydate </code></pre> <p>in my MySQL-Query, "01.03.2017" is displayed.</p> <p>When I use </p> <pre><code>UNIX_TIMESTAMP(orderdate) as mydate </code></pre> <p>and output it like <code>date('d.m.Y', $mydate)</code></p> <p>I get 28.02.2017 as a result. </p> <p>Is this a "February-Problem"? How can I make date() do it right?</p> <p>----------------- Edit 1 -----------------</p> <p>I put this in my code already before.</p> <pre><code># set timezone date_default_timezone_set('Europe/Vienna'); # daylight-saving time if(date('I') &lt; 1){ mysqli_query($db, "SET time_zone = '+01:00'"); }else{ mysqli_query($db, "SET time_zone = '+02:00'"); } </code></pre> <p>----------------- Edit 2 -----------------</p> <p>Ok, I generated a MySQL-Table with this Content (Field-Type: "date"):</p> <pre><code>xdate 2017-01-01 2017-01-15 2017-01-31 2017-02-01 2017-02-15 2017-02-28 2017-03-01 2017-03-15 2017-03-31 2017-04-01 2017-04-15 2017-04-30 2017-05-01 2017-05-15 2017-05-31 2017-06-01 2017-06-15 </code></pre> <p>Generated Output from my Script:</p> <pre><code>Current Time 2017-06-16 02:31:08 PHP-Time 2017-06-16 02:31:08 MySQL-Time Col 1 Col 2 Col 3 Col 4 Col 5 Col 6 1483221600 2016-12-31 1483225200 2017-01-01 2017-01-01 2017-01-01 1484431200 2017-01-14 1484434800 2017-01-15 2017-01-15 2017-01-15 1485813600 2017-01-30 1485817200 2017-01-31 2017-01-31 2017-01-31 1485900000 2017-01-31 1485903600 2017-02-01 2017-02-01 2017-02-01 1487109600 2017-02-14 1487113200 2017-02-15 2017-02-15 2017-02-15 1488232800 2017-02-27 1488236400 2017-02-28 2017-02-28 2017-02-28 1488319200 2017-02-28 1488322800 2017-03-01 2017-03-01 2017-03-01 1489528800 2017-03-14 1489532400 2017-03-15 2017-03-15 2017-03-15 1490911200 2017-03-31 1490911200 2017-03-31 2017-03-31 2017-03-31 1490997600 2017-04-01 1490997600 2017-04-01 2017-04-01 2017-04-01 1492207200 2017-04-15 1492207200 2017-04-15 2017-04-15 2017-04-15 1493503200 2017-04-30 1493503200 2017-04-30 2017-04-30 2017-04-30 1493589600 2017-05-01 1493589600 2017-05-01 2017-05-01 2017-05-01 1494799200 2017-05-15 1494799200 2017-05-15 2017-05-15 2017-05-15 1496181600 2017-05-31 1496181600 2017-05-31 2017-05-31 2017-05-31 1496268000 2017-06-01 1496268000 2017-06-01 2017-06-01 2017-06-01 1497477600 2017-06-15 1497477600 2017-06-15 2017-06-15 2017-06-15 </code></pre> <p>Current Time is the same Time displayed on my Computer. So it is the correct Time and the Time-Settings seem to be ok. "Current Time" is generated by the date()-Function in PHP and with MySQLs NOW().</p> <p>Col 1 is the UNIX_TIMESTAMP of the MySQL-Query. </p> <p>Col 2 is the Date generated with the PHP-Date-Function and Col 1.</p> <p>Col 3 is the Unix Timestamp of strtotime().</p> <p>Col 4 is the Date generated with the PHP-Date-Function and Col 3.</p> <p>Col 5 is the Date formated with DATE_FORMAT(xdate, '%Y-%m-%d').</p> <p>Col 6 is the Date directly from the database.</p> <p>As you can see, the first eight Rows are wrong calculated by the date()-Function (2nd Column) which is fed with the (wrong?) UNIX_TIMESTAMP() of the MySQL-Query:</p> <pre><code>date('d.m.Y', $mydate) </code></pre> <p>I tested what happens, if I replace the line</p> <pre><code> mysqli_query($db, "SET time_zone = '+02:00'"); </code></pre> <p>with </p> <pre><code> mysqli_query($db, "SET time_zone = '+01:00'"); </code></pre> <p>The date-Function gives back the correct Date, BUT the NOW() in MySQL deliveres the wrong Time then. </p> <p>When I remove the part with the Settings from the Script (see Edit 1), everything is equal, but then I have the wrong Timezone. </p> <p>Has anyone a clue for me?</p> </div>


<div class="post-text" itemprop="text"> <p>Before i used <code>datetime</code> for post created time from database,</p> <pre><code>SELECT MONTH(created)+1, count(*) FROM post_comments WHERE YEAR(created) = YEAR(CURDATE()) group by MONTH(created) ORDER BY MONTH(created) </code></pre> <p>and now i am using <code>unix timestamp</code>. How I need to make a change in the above code, to work it <code>unix timestamp</code>.</p> <p>Before the created time looks like this: <code>2018-04-28 09:03:02</code></p> <p>and now the created time looks like this: <code>1524921263</code></p> </div>


<div class="post-text" itemprop="text"> <p>I have the following function but have a problem in that my timestamp field in the database is a mysql timestamp type which is in format '2012-08-30 11:31:41' and the strtotime('-12 hours'); is giving a unix timestamp.</p> <p>whats the solution?</p> <pre><code>public function checkIfItemVisited($user_id, $item_id) { $timeago = strtotime('-12 hours'); $params = array( ':user_id' =&gt; $user_id, ':item_id' =&gt; $item_id, ':timestamp' =&gt; $timeago ); $sql = "SELECT `visit_id` FROM `item_visits` WHERE `user_id` = :user_id AND `item_id` = :item_id AND `timestamp` &gt; :timestamp"; $stmt = $this-&gt;query($sql, $params); if($stmt-&gt;rowCount() &gt; 0) : return false; else : $this-&gt;countVisit($user_id, $item_id); endif; } </code></pre> </div>


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这些插件太强了,Chrome 必装!尤其程序员!

推荐 10 款我自己珍藏的 Chrome 浏览器插件


今天下午在朋友圈看到很多人都在发github的羊毛,一时没明白是怎么回事。 后来上百度搜索了一下,原来真有这回事,毕竟资源主义的羊毛不少啊,1000刀刷爆了朋友圈!不知道你们的朋友圈有没有看到类似的消息。 这到底是啥情况? 微软开发者平台GitHub 的一个区块链项目 Handshake ,搞了一个招募新会员的活动,面向GitHub 上前 25万名开发者派送 4,246.99 HNS币,大约价...


前言: 如何悄悄的打开朋友的摄像头,看看她最近过的怎么样,嘿嘿!这次让我带你们来实现这个功能。 注: 这个程序仅限在朋友之间开玩笑,别去搞什么违法的事情哦。 代码 发送邮件 使用python内置的email模块即可完成。导入相应的代码封装为一个send函数,顺便导入需要导入的包 注: 下面的代码有三处要修改的地方,两处写的qq邮箱地址,还有一处写的qq邮箱授权码,不知道qq邮箱授权码的可以去百度一...


从来没讲过运维,因为我觉得运维这种东西不需要太多的知识面,然后我一个做了运维朋友告诉我大错特错,他就是从3K的运维一步步到40K的,甚至笑着说:我现在感觉自己什么都能做。 既然讲,就讲最重要的吧。 监控是整个运维乃至整个产品生命周期中最重要的一环,事前及时预警发现故障,事后提供详实的数据用于追查定位问题。目前业界有很多不错的开源产品可供选择。选择一款开源的监控系统,是一个省时省力、效率最高的方...



技术大佬:我去,你写的 switch 语句也太老土了吧

昨天早上通过远程的方式 review 了两名新来同事的代码,大部分代码都写得很漂亮,严谨的同时注释也很到位,这令我非常满意。但当我看到他们当中有一个人写的 switch 语句时,还是忍不住破口大骂:“我擦,小王,你丫写的 switch 语句也太老土了吧!” 来看看小王写的代码吧,看完不要骂我装逼啊。 private static String createPlayer(PlayerTypes p...


Linux系统的最常用命令第一组 用户管理类命令1.添加用户2.修改密码3.删除用户4.切换用户5.添加用户组6.删除用户组第二组 文件与目录类命令1.查看目录2.改变工作目录3.复制文件、目录4.移动或改名5.删除文件、目录6.改变文件权限7.创建目录8.新建文件9.查看目录大小10.查看当前路径第三组 压缩打包类命令压缩解压1.压缩解压--gzip2.压缩解压--bzip23.压缩解压--ta

和黑客斗争的 6 天!

互联网公司工作,很难避免不和黑客们打交道,我呆过的两家互联网公司,几乎每月每天每分钟都有黑客在公司网站上扫描。有的是寻找 Sql 注入的缺口,有的是寻找线上服务器可能存在的漏洞,大部分都...


loonggg读完需要3分钟速读仅需 1 分钟大家好,我是你们的校长。我之前讲过,这年头,只要肯动脑,肯行动,程序员凭借自己的技术,赚钱的方式还是有很多种的。仅仅靠在公司出卖自己的劳动时...


刚才邻居打了个电话说:喂小灰,你家wifi的密码是多少,我怎么连不上了。 我。。。 我也忘了哎,就找到了一个好办法,分享给大家: 第一种情况:已经连接上的wifi,怎么知道密码? 打开:控制面板\网络和 Internet\网络连接 然后右击wifi连接的无线网卡,选择状态 然后像下图一样: 第二种情况:前提是我不知道啊,但是我以前知道密码。 此时可以利用dos命令了 1、利用netsh wlan...




提到“程序员”,多数人脑海里首先想到的大约是:为人木讷、薪水超高、工作枯燥…… 然而,当离开工作岗位,撕去层层标签,脱下“程序员”这身外套,有的人生动又有趣,马上展现出了完全不同的A/B面人生! 不论是简单的爱好,还是正经的副业,他们都干得同样出色。偶尔,还能和程序员的特质结合,产生奇妙的“化学反应”。 @Charlotte:平日素颜示人,周末美妆博主 大家都以为程序媛也个个不修边幅,但我们也许...






即将毕业的应届毕业生一枚,现在只拿到了两家offer,但最近听到一些消息,其中一个offer,我这个组据说客户很少,很有可能整组被裁掉。 想问大家: 如果我刚入职这个组就被裁了怎么办呢? 大家都是什么时候知道自己要被裁了的? 面试软技能指导: BQ/Project/Resume 试听内容: 除了刷题,还有哪些技能是拿到offer不可或缺的要素 如何提升面试软实力:简历, 行为面试,沟通能...

离职半年了,老东家又发 offer,回不回?

有小伙伴问松哥这个问题,他在上海某公司,在离职了几个月后,前公司的领导联系到他,希望他能够返聘回去,他很纠结要不要回去? 俗话说好马不吃回头草,但是这个小伙伴既然感到纠结了,我觉得至少说明了两个问题:1.曾经的公司还不错;2.现在的日子也不是很如意。否则应该就不会纠结了。 老实说,松哥之前也有过类似的经历,今天就来和小伙伴们聊聊回头草到底吃不吃。 首先一个基本观点,就是离职了也没必要和老东家弄的苦...


阿里巴巴全球数学竞赛( Alibaba Global Mathematics Competition)由马云发起,由中国科学技术协会、阿里巴巴基金会、阿里巴巴达摩院共同举办。大赛不设报名门槛,全世界爱好数学的人都可参与,不论是否出身数学专业、是否投身数学研究。 2020年阿里巴巴达摩院邀请北京大学、剑桥大学、浙江大学等高校的顶尖数学教师组建了出题组。中科院院士、美国艺术与科学院院士、北京国际数学...




虽然大公司并不是人人都能进,但我仍建议还未毕业的同学,尽力地通过校招向大公司挤,但凡挤进去,你这一生会容易很多。 大公司哪里好?没能进大公司怎么办?答案都在这里了,记得帮我点赞哦。 目录: 技术氛围 内部晋升与跳槽 啥也没学会,公司倒闭了? 不同的人脉圈,注定会有不同的结果 没能去大厂怎么办? 一、技术氛围 纵观整个程序员技术领域,哪个在行业有所名气的大牛,不是在大厂? 而且众所...




本文作者用对比非常鲜明的两个开发团队的故事,讲解了敏捷开发之道 —— 如果你的团队缺乏统一标准的环境,那么即使勤劳努力,不仅会极其耗时而且成果甚微,使用...




当HR压你价,说你只值7K时,你可以流畅地回答,记住,是流畅,不能犹豫。 礼貌地说:“7K是吗?了解了。嗯~其实我对贵司的面试官印象很好。只不过,现在我的手头上已经有一份11K的offer。来面试,主要也是自己对贵司挺有兴趣的,所以过来看看……”(未完) 这段话主要是陪HR互诈的同时,从公司兴趣,公司职员印象上,都给予对方正面的肯定,既能提升HR的好感度,又能让谈判气氛融洽,为后面的发挥留足空间。...


HashMap底层实现原理,红黑树,B+树,B树的结构原理 Spring的AOP和IOC是什么?它们常见的使用场景有哪些?Spring事务,事务的属性,传播行为,数据库隔离级别 Spring和SpringMVC,MyBatis以及SpringBoot的注解分别有哪些?SpringMVC的工作原理,SpringBoot框架的优点,MyBatis框架的优点 SpringCould组件有哪些,他们...