大约有 40,000 项符合查询结果(耗时:0.0273秒) [XML]
Best way to work with dates in Android SQLite [closed]
...ing (that is newest date goes first):
public static final String QUERY = "SELECT table._id, table.dateCol FROM table ORDER BY table.dateCol DESC";
//...
Cursor cursor = rawQuery(QUERY, null);
cursor.moveToFirst();
while (!cursor.isAfterLast()) {
// Process results
}
Al...
How many database indexes is too many?
...
It depends on the operations that occur on the table.
If there's lots of SELECTs and very few changes, index all you like.... these will (potentially) speed the SELECT statements up.
If the table is heavily hit by UPDATEs, INSERTs + DELETEs ... these will be very slow with lots of indexes since t...
Commenting code in Notepad++
...ers' benefit (for python and notepad++)
1) Ctrl+K on multiple lines (i.e. selected region) allows you to block comment.
Also note that pressing the combination multiple times allows you to add multiple "#"s (sometimes I use that while testing to differentiate from other comments)
2) Ctrl+Shift+K...
Why all the Active Record hate? [closed]
...need to write raw SQL, it's easily done.
@Tim Sullivan
...and you select several instances of the model, you're basically doing a "select * from ..."
Code:
people = Person.find(:all, :select=>'name, id')
This will only select the name and ID columns from the database, all the other ...
Can git be integrated with Xcode?
...indow. Since your working directory is set to the parent directory of the selected file the command is nice and short.
I have no connection at all with Decimus. I am just a satisfied user who has run thousands of commands through DTerm.
Edit: As of 27 August 2009 DTerm is free. If you bought your...
Auto increment in phpmyadmin
...e on the pop-up window, scroll left and check A_I. Also make sure you have selected None for Default
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How can I select rows with most recent timestamp for each key value?
...r data. Each row has a sensor id, a timestamp, and other fields. I want to select a single row with latest timestamp for each sensor, including some of the other fields.
...
实战做项目如何选择开源许可协议(二)- 开放代码 - 开源 & Github - 清泛...
实战做项目如何选择开源许可协议(二)- 开放代码opensource_code通过《实战做项目如何选择开源许可协议(一)-了解协议》大概知道了有哪些开源协议和各个协议的作用和区别。我们准备把代码开放出去时,需...通过《实战做项...
【动图】AppInventor2如何播放gif动图?如何播放动画? - App Inventor 2 ...
...会发现图片不会动,只会展示静态图片。那么问题来了,如何展示动图/动画效果呢?
播放动态图,两种思路:
1、使用网络 url 的 gif 图片,设置为 web 浏览器的链接地址,会自动播放网络动图,一直循环播放不能控制停止,...
如何获取IE (控件)的所有链接(包括Frameset, iframe) - C/C++ - 清泛网 -...
如何获取IE (控件)的所有链接(包括Frameset, iframe)IE 顶层 body 节点通过IHTMLElement->get_all 方法无法获取iframe 里面的节点列表:CComPtr<IHTMLElement> body;...CComPtr<IDispatc...IE 顶层 body 节点通过IHTMLElement->get_all 方法无法获取iframe 里面的节...
