I'm new to Neo4j. I've just opened the Desktop application. Starting a Project, the dashboard lists "Add Database" and "Add File". If data is stored in a database then what's a file? I don't get what a file does. Off hand, when I click on each (either the sample database or the sample file) they open the database browser thing so this doesn't help to understand the difference either..
You would use Add File to reference a file with a Cypher query (or series of Cypher queries).
When you open a file that you've saved here, it will open the browser window (associated with the currently running Database) and paste the file contents into the query box.
So this is a more portable way to save important queries saved in files (such as already established scripts in Cypher) that you expect to run often or reuse/test across databases.
Add Database is used to create a new database instance (technically "dbms" would be the better term, since this doesn't have to do with multi-database features in Neo4j). You can select the version of Neo4j to use for the database, and configure and manage it as needed.
Related
Using an pan-genome building tool I've ended with a database in an unfamiliar format to me which in theory should be explorable by the Neo4j browser.
Nevertheless I can't seem to find any way to achieve so and any mention on how to do it in any bibliography besides the instructions of the manual provided by the author of said tool.
I've tried to do this using Neo4j community edition server (v. 3.5.3) with the example file same as the instructions suggest but it just doesn't seem to detect the database showing only the default one.
The mentioned part of the tutorial can be found here: https://www.bioinformatics.nl/pangenomics/manual/tutorial_part3/
So, copy the database content to the neo4j data folder. Once you have that, open the neo4j.conf file and set the following configuration:
dbms.default_database=chloroplast_DB
I am not exactly sure that is the database name, use the same name as is the database folder and then start the database.
I have created an app that uses a Neo4J database. I developed a local instance in Windows, purchased some space on a development GrapheneDB server, migrated my database, and had a few users test out my app. There are a few issues in my application that I wish to debug. I want to do development on a copy of their data only on my local instance of Neo4j. GrapheneDB offers the ability to download a graph.db.zip file that contains the contents of the database. How do I import this file using Neo4j desktop? It appears Neo4J desktop only imports csv files. I tried overwriting the graph.db folder with the contents of the zip file and my database doesn't appear in my Neo4J desktop. How do I import my GrapheneDB to my local?
Two approaches that are probably fairly similar under the hood:
Use neo4j-admin
Create a local graph in Neo4j Desktop
I used the same graph name as I'd used in Graphene
Make sure the database version is the same as is in Graphene
Do not start the database yet but instead click Manage, then the Terminal tab
Unzip the contents of the graphdb.zip file somewhere local - say, C:\Temp\graphdb for this example
Run neo4j-admin restore --from="C:\temp\graphdb"
Start the database using Neo4j Desktop
You should have a working database
File copying by hand
Create a local graph in Neo4j Desktop
I used the same graph name as I'd used in Graphene
Make sure the database version is the same as is in Graphene
Do not start the database yet but instead click Manage, then Open Folder
Enter the databases folder - it should be empty
Create a new folder called graph.db (the name needs to be exact)
Copy the contents of the graphdb.zip file into the new graph.db folder
Start the database using Neo4j Desktop
You should have a working database
I tested this on a graph with only one node, but it did work - I suspect the database version matching is pretty vital.
I am creating a Database called Reminder.sqlite via Sqlite Manager add-on in firefox, after creating I am importing it to my iOS Application, the problem is that records are saved in database table but when I run a Select query in Sqlite manager no records are displayed any suggestions why this is happening?
make sure you have add database file into project and remove database file from document directory.
because old file is exist in document director, your new file with same name cannot be overwrite old one.(according to approach, if we use in code)
It may help you.
I got an app I'm working on that uses static data from a sqlite database to do various things, While I only need read only access to the database, depending on the episode they pick from the first screen I want it to use a different database file and I want the list of available episodes to be updateable on the fly. and I got help to get the list of available episodes updated, and the proper content downloaded and stored in separate folders, So I know I could when the episode is selected delete the sql file in the documents folder and copy in the new one each time and that would work well enough for what I'm trying to do. but it seems like a bit much extra work to have to check for file, delete file, copy in new one. then open it from there each time the user wants to pick a different episode. and I don't want to put all the sql files together as that will be a bigger hassle then the first route especially if this app stays around long enough to have a long list of episodes.
so my question here is: can I get at least read-only access to an sql file that I've downloaded (or one in the bundle for testing) with out having to first copy it to the documents? and if so how would i open the file?
Can I get at least read-only access to an SQL file that I've downloaded (or one in the bundle for testing) without having to first copy it to the documents directory?
Yes. Files in the app bundle are readable (if they weren't, there would be no point in storing files in the bundle).
And if so, how would I open the file?
It's not clear what you're asking here - if you want to perform SQL queries on the file, you should use the sqlite3 library which is available on iOS.
I'm having problems with deciding where to store files uploaded by user in my asp.net mvc application.
I've been using asp classic for about 10 years now, and always stored my files on disc at the site, and storing filename and folders in database.
How would you guys approach this problem?
Having them in database, and might get performance issues there? or leave it the way I always done it, and might get problems with "sync" filesystem and db?
I must have some sort of relational info in the database, so I cant store them just on disc
I'm using sql 2005 atm, and I read somewhere that sql 2008 has some sort of datacolumn now that just stores a "pointer" (like the text-datatype) to a file on disc, is that the way to go?
In some way, database is called a database for some reason, so not sure why invent wheel again? :)
Any pointers or ideas would be appreciated, I guess I'm just wondering about problems I might run into if I go with the database-approach
/M
You could use the special App_Data folder to put uploaded files and store the path into the database. If you go with SQL Server 2008 then you could take a look at the FILESTREAM type.
I'm not sure if your web application is load balanced or not, for the file management systems I've built in the past, I have always stored my files on a SAN or a network shared drive so they are accessible to all web/app servers. In addition, rather than storing the files as is, I always change the file name and type before I persist them on the file system (I typically use a GUID as the file name and a random file extension). Lastly, I would store the original file information in the database the files can be moved or copied logically rather than physically.