大约有 18,336 项符合查询结果（耗时：0.0392秒） [XML]
Fetch the row which has the Max value for a column
...my_date column value is equal to the maximum value of my_date for that userid. This may retrieve multiple rows for the userid where the maximum date is on multiple rows.
select userid,
my_date,
...
from
(
select userid,
my_date,
...
max(my_date) over (partition by...
jquery: $(window).scrollTop() but no $(window).scrollBottom()
... answered Jan 11 '11 at 7:47
David TangDavid Tang
84.3k2828 gold badges156156 silver badges144144 bronze badges
...
Android file chooser [closed]
...
EDIT (02 Jan 2012):
I created a small open source Android Library Project that streamlines this process, while also providing a built-in file explorer (in case the user does not have one present). It's extremely simple to use, requiring only a few lines of code.
You can find it ...
Escape quotes in JavaScript
...it's an HTML/XML encoding issue: you can't have double-quote characters inside an attributes value w/o escaping them... otherwise browsers/parsers think you're ending the attribute value declaration.
– Aaron
Aug 21 '10 at 7:09
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creating a random number using MYSQL
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RAND(), UUID(), NOW() are indeterministic functions. The calling of such functions should be avoid from being written into the bin log for replication. For example. INSERT INTO t SET ID=UUID(); will cause the value of the ID fields to ...
LoadRunner中参数化技术详解 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...ique Number
唯一值来代替参数
7
Vuser ID
LoadRunner使用该虚拟用户的ID来代替参数值，该ID是由Controller来控制的，在VuGen中运行脚本时，该值为-1.
8
DataFile/Table
可以在属性设置中编辑...
Sass .scss: Nesting and multiple classes?
..., so the following is possible too:
.container {
background:red;
#id &{
background:blue;
}
}
/* compiles to: */
.container {
background: red;
}
#id .container {
background: blue;
}
However be aware, that this somehow breaks your nesting structure and thus may incre...
How can I efficiently select a Standard Library container in C++11?
...for niche applications.
To build such a chart, you just need two simple guidelines:
Choose for semantics first
When several choices are available, go for the simplest
Worrying about performance is usually useless at first. The big O considerations only really kick in when you start handling a f...
How do I escape reserved words used as column names? MySQL/Create Table
...f ANSI SQL mode is enabled
CREATE TABLE IF NOT EXISTS misc_info
(
id INTEGER PRIMARY KEY AUTO_INCREMENT NOT NULL,
"key" TEXT UNIQUE NOT NULL,
value TEXT NOT NULL
)
ENGINE=INNODB;
or the proprietary back tick escaping otherwise. (Where to find the ` character on various key...
RabbitMQ / AMQP: single queue, multiple consumers for same message?
...ot if the consumers are on the same queue. From RabbitMQ's AMQP Concepts guide:
it is important to understand that, in AMQP 0-9-1, messages are load balanced between consumers.
This seems to imply that round-robin behavior within a queue is a given, and not configurable. Ie, separate queues ar...