大约有 19,000 项符合查询结果(耗时:0.0382秒) [XML]

https://www.tsingfun.com/ilife/tech/1001.html 

大数据时代的数据化运营 - 资讯 - 清泛网 - 专注C/C++及内核技术

...响。今天我们采访到了中清龙图副总裁李翀为广大cp讲解如何在大数据时代进行数据运营。 什么是大数据? 大数据第一个特点是数据量特别大,举个例子,比如一个人站在这里,仅知道他的身高体重等等,是没有什么实际意义...
https://stackoverflow.com/ques... 

Calculate difference between two datetimes in MySQL

I am storing the last login time in MySQL in, datetime -type filed. When users logs in, I want to get the difference between the last login time and the current time (which I get using NOW() ). ...
https://stackoverflow.com/ques... 

How do I get SUM function in MySQL to return '0' if no values are found?

Say I have a simple function in MySQL: 4 Answers 4 ...
https://www.tsingfun.com/ilife/life/1647.html 

致PHP路上的“年轻人” - 杂谈 - 清泛网 - 专注C/C++及内核技术

...落的“过来人”,还是想写点东西给“年轻人”。 关于如何成长? 我直白的答案还是建议通过实践,通过项目来成长。虽然提倡多参加项目,但项目不能是乱七八糟的项目什么都去尝试做,对于刚工作的同学,希望做这两类...
https://stackoverflow.com/ques... 

Compare dates in MySQL

... For people comming from google: date type in mysql comes in yyyy-mm-dd format. – Błażej Michalik Nov 29 '15 at 20:24 add a comment ...
https://stackoverflow.com/ques... 

How do you configure Django for simple development and deployment?

... development, but on a live server something more robust is often needed ( MySQL / PostgreSQL , for example). Invariably, there are other changes to make to the Django settings as well: different logging locations / intensities, media paths, etc. ...
https://stackoverflow.com/ques... 

Simulating group_concat MySQL function in Microsoft SQL Server 2005?

I'm trying to migrate a MySQL-based app over to Microsoft SQL Server 2005 (not by choice, but that's life). 11 Answers ...
https://stackoverflow.com/ques... 

Where is the Java SDK folder in my computer? Ubuntu 12.04

...in /usr/bin/java. Dig again: Step 2: $ ls -l /usr/bin/java lrwxrwxrwx 1 root root 22 2009-01-15 18:34 /usr/bin/java -> /etc/alternatives/java So, now we know that /usr/bin/java is actually a symbolic link to /etc/alternatives/java. Dig deeper using the same method above: Step 3: $ ls -l /...
https://stackoverflow.com/ques... 

Convert text into number in MySQL query

Is it possible to convert text into number within MySQL query? I have a column with an identifier that consists a name and a number in the format of "name-number". The column has VARCHAR type. I want to sort the rows according the number (rows with the same name) but the column is sorted according d...
https://stackoverflow.com/ques... 

Ordering by specific field value first

... There's also the MySQL FIELD function. If you want complete sorting for all possible values: SELECT id, name, priority FROM mytable ORDER BY FIELD(name, "core", "board", "other") If you only care that "core" is first and the other values ...