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搭建高可用mongodb集群（二）—— 副本集 - 大数据 & AI - 清泛网 - 专注C/...
...切换连接？目前需要手工切换。
主节点的读写压力过大如何解决？
从节点每个上面的数据都是对数据库全量拷贝，从节点压力会不会过大？
数据压力大到机器支撑不了的时候能否做到自动扩展？
这篇文章看完这些问题就...
How to make MySQL handle UTF-8 properly
... my database can handle UTF-8 characters correctly. How I can do this with MySQL?
14 Answers
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How to log SQL statements in Grails
...6Spy.
B) look at it on database level. For example really easy to do with mysql.
Find out where you general_log_file is. Active general log if no activated already.
mysql command line> show variables like "%general_log%";
mysql command line> set global general_log = true;
Now everything i...
MYSQL Dump only certain rows
I am trying to do a mysql dump of a few rows in my database. I can then use the dump to upload those few rows into another database. The code I have is working, but it dumps everything. How can I get mysqldump to only dump certain rows of a table?
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Generating a random & unique 8 character string using MySQL
I'm working on a game which involves vehicles at some point. I have a MySQL table named "vehicles" containing the data about the vehicles, including the column "plate" which stores the License Plates for the vehicles.
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MySQL, Check if a column exists in a table with SQL
I am trying to write a query that will check if a specific table in MySQL has a specific column, and if not — create it. Otherwise do nothing. This is really an easy procedure in any enterprise-class database, yet MySQL seems to be an exception.
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Installing PDO driver on MySQL Linux server
...o install the necessary PDO parts from apt using sudo apt-get install php5-mysql
There is no limitation between using PDO and mysql_ simultaneously. You will however need to create two connections to your DB, one with mysql_ and one using PDO.
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how to mysqldump remote db from local machine
I need to do a mysqldump of a database on a remote server, but the server does not have mysqldump installed. I would like to use the mysqldump on my machine to connect to the remote database and do the dump on my machine.
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Activity启动器（ActivityStarter）如何查看并启动其他App · App Inventor 2 中文网
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Activity启动器（ActivityStarter）如何查看并启动其他App
App包名和类名的查看
不同品牌手机可能略有不同
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App包名和类名的查看
由 App Inventor 2 创建的应用要弄...
How to convert an image to base64 encoding?
...
Here is the code for upload to encode and save it to the MySQL
if (!isset($_GET["getfile"])) {
if ($_FILES["file"]["error"] > 0) {
echo "Error: " . $_FILES["file"]["error"] . "<br>";
} else {
move_uploaded_file($_FILES["file"]["tmp_name"], $_FILES[...