大约有 40,000 项符合查询结果（耗时：0.0563秒） [XML]
How to delete or add column in SQLITE?
...upports a limited subset of ALTER TABLE. The ALTER TABLE command in SQLite allows the user to rename a table or to add a new column to an existing table. It is not possible to rename a column, remove a column, or add or remove constraints from a table.
You can:
create new table as the one you ar...
Markdown open a new window link [duplicate]
... common features of HTML. One of its best features is that you can always fallback to the full syntax for HTML. This includes doing things that aren't included in markdown. Personally, I like that markdown is concise and includes very little fluff. It makes it easier to learn the whole set of short...
What is Lazy Loading?
...
It's called lazy loading because, like a lazy person, you are putting off doing something you don't want to. The opposite is Eager Loading, where you load something right away, long before you need it.
If you are curious why peop...
Catching multiple exception types in one catch block
...fining the exceptions). Even given that there are exceptions you want to "fall through", you should still be able to define a hierarchy to match your needs.
abstract class MyExceptions extends Exception {}
abstract class LetterError extends MyExceptions {}
class AError extends LetterError {}
cla...
How do I import CSV file into a MySQL table?
... MySQL table so that I can refactor into a sane format. I created a table called 'CSVImport' that has one field for every column of the CSV file. The CSV contains 99 columns , so this was a hard enough task in itself:
...
ASP.NET MVC: What is the purpose of @section? [closed]
...
@section is for defining a content are override from a shared view. Basically, it is a way for you to adjust your shared view (similar to a Master Page in Web Forms).
You might find Scott Gu's write up on this very interesting.
Edit: Based on additional question clarification
The @RenderSection...
Name node is in safe mode. Not able to leave
...e leave
hadoop dfsadmin has been deprecated and so is hadoop fs command, all hdfs related tasks are being moved to a separate command hdfs.
share
|
improve this answer
|
f...
Socket File “/var/pgsql_socket/.s.PGSQL.5432” Missing In Mountain Lion (OS X Server)
...
Check for the status of the database:
service postgresql status
If the database is not running, start the db:
sudo service postgresql start
share
|
improve t...
AsyncTask Android example
...
Hey what i am running async task on service i want to return some value to main ui thread.
– Dipen
Jan 21 '15 at 16:31
...
Get application version name using adb
...
well if you insist doing it in adb, you can do: adb shell service call package 1 s16 "my.package" i32 0. the version number will be somewhere near 0x1F and the name string after 0x20 (should be 3rd line)
– arbuz
Aug 14 '12 at 10:43
...