大约有 47,000 项符合查询结果（耗时：0.0630秒） [XML]
How to generate the “create table” sql statement for an existing table in postgreSQL
I have created a table in postgreSQL. I want to look at the SQL statement used to create the table but cannot figure it out.
...
How to comment out a block of Python code in Vim
I was wondering if there was any key mapping in Vim to allow me to indent certain lines of code (whether those lines have been selected in visual mode, or n lines above/below current cursor position).
...
Appending a line to a file only if it does not already exist
...ple :)
grep + echo should suffice:
grep -qxF 'include "/configs/projectname.conf"' foo.bar || echo 'include "/configs/projectname.conf"' >> foo.bar
-q be quiet
-x match the whole line
-F pattern is a plain string
https://linux.die.net/man/1/grep
Edit:
incorporated @cerin and @thijs-wout...
Assign an initial value to radio button as checked
...
you can also just mention that attribute with no value assigned i.e.<input type="radio" checked>
– niksvp
Jan 17 '11 at 7:59
...
Implicit “Submit” after hitting Done on the keyboard at the last EditText
I've used some apps where when I fill my username, then go to my password, if I hit "Done" on the keyboard, the login form is automatically submitted, without me having to click the submit button. How is this done?
...
Extract a dplyr tbl column as a vector
...dplyr tbl as a vector, from a tbl with database back-end (i.e. the data frame/table can't be subset directly)?
7 Answers
...
Code snippet or shortcut to create a constructor in Visual Studio
...ctor for the class you are in:
public MyClass()
{
}
It seems that in some cases you will have to press TAB twice.
share
|
improve this answer
|
follow
|
...
Only initializers, entity members, and entity navigation properties are supported
...> o.Paid == false);
return View(debts);
}
That, of course, would mean that you bringing all of the data back to the web server and filtering the data on it. If you want to filter on the DB server, you can create a Calculated Column on the table or use a Stored Procedure.
...
How do you clear the SQL Server transaction log?
I'm not a SQL expert, and I'm reminded of the fact every time I need to do something beyond the basics. I have a test database that is not large in size, but the transaction log definitely is. How do I clear out the transaction log?
...
Django: “projects” vs “apps”
...and "application" in this context, because I'm not clear on their specific meaning in Django.
6 Answers
...