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How do I calculate tables size in Oracle
Being used to (and potentially spoiled by) MSSQL, I'm wondering how I can get at tables size in Oracle 10g.
I have googled it so I'm now aware that I may not have as easy an option as sp_spaceused. Still the potential answers I got are most of the time outdated or don't work. Probably because I'm no...
Rails :dependent => :destroy VS :dependent => :delete_all
...back.
The :delete_all is made directly in your application and deletes by SQL :
DELETE * FROM users where compagny_id = XXXX
With the :destroy, there is an instantiation of all of your children. So, if you can't destroy it or if each has their own :dependent, its callbacks can be called.
...
How to load assemblies in PowerShell?
... use the Add-Type cmdlet e.g.:
Add-Type -Path 'C:\Program Files\Microsoft SQL Server\110\SDK\Assemblies\Microsoft.SqlServer.Smo.dll'
There are multiple different versions and you may want to pick a particular version. :-)
...
Increment a database field by 1
With MySQL, if I have a field, of say logins, how would I go about updating that field by 1 within a sql command?
5 Answers...
Folder structure for a Node.js project
....json
├── schema
│ ├── create-db.sh
│ ├── db.sql
├── scripts
│ └── deploy-production.sh
├── src
│ ├── app -> Containes API routes
│ ├── db -> DB Models (ORM)
│ └── server.js -> the Server initlializer...
Unique BooleanField value in Django?
...)ing it again, you just need to filter and update, which produces just one SQL query and helps keep the DB consistent: if self.is_the_chosen_one: <newline> Character.objects.filter(is_the_chosen_one=True).update(is_the_chosen_one=False) <newline> super(Character, self).save(*args, **kwar...
Reset the database (purge all), then seed a database
...s from migrations
Make sure you have no connections to db (rails server, sql client..) or the db won't drop.
schema.rb is a snapshot of the current state of your database generated by:
rake db:schema:dump
share
...
Batch file to delete files older than N days
...
I used this syntax on Win Server 2008: forfiles /P "C:\Mysql_backup" /S /M *.sql /D -30 /C "cmd /c del @PATH"
– jman
Apr 18 '11 at 8:42
...
Simple Log to File example for django 1.3+
... - the exception (hence propagate) is the backends where I love to see the SQL calls since they can get crazy.. Last is my app were I have two handlers and push everything to it.
Now how do I enable MYAPP to use it...
Per the documentation put this at the top of your files (views.py)..
import ...
UPDATE multiple tables in MySQL using LEFT JOIN
...ete orders: performance of LEFT JOIN compared to NOT IN
Unfortunately, MySQL does not allow using the target table in a subquery in an UPDATE statement, that's why you'll need to stick to less efficient LEFT JOIN syntax.
s...