We have been using MongoDB as our main datastore for a little while but I've been finding it difficult to please our business users with it's lack of relations.
What I'm hoping to do is dump data from Mongo to MySQL to allow these heavy MySQL users the ability to query in a format they are used to.
Does anyone know an elegant way to do this?
I'm hoping to avoid some heavy scripting to get there...
Read all the data ! Write all the data !
Use your language specific driver for MongoDb and Mysql to fetch all the data from MongoDb and insert into Mysql as per your table schemas. You will need some coding for sure.
Update: You can give a try to this tool :
http://grahamis.com/blog/2010/06/10/squealer-intro/
https://github.com/delitescere/squealer
Strange question. Do you except arbitrary documents would fit into a RDBMS schema?
You must be dreaming. Try the CSV export...everything else is up to you and your coding skills.
The answer is Kettle.
Thanks to Adam our engineer he found the solution.
http://kettle.pentaho.com/
They have added a tool to connect to Mongo.
You can then migrate the data to MySQL.
Related
I am using MongoDB first time here. Is there any best way to transfer bulkdata from mysql into MongoDB. I try to search to in different ways but i did not find.
You would have to physically map all your mysql tables to documents in mongodb but you can use an already developed tool.
You can try: Mongify (http://mongify.com/)
It's a super simple way to transform your data from a MySql to MongoDB. It has a ton of support for changing your existing schema into a schema that would work better with MongoDB.
Mongify will read your mysql database, build a translation file for you and all you have to do is map how you want your data transformed.
It supports:
Updating internal IDs (to BSON ObjectID)
Updating referencing IDs
Typecasting values
Embedding Tables into other documents
Before filters (to change data manually before import)
and much much more...
There is also a short 5 min video on the homepage that shows you how easy it is.
Try it out and tell me what you think.
Please up vote if you find this answer helpful.
I need help from you experts about practices regarding database development. I have a few questions regarding MySQL databases:
Is there a way for MySQL that a database and its structure is developed in an XML language and then converted to a fully functional MySQL database?
Is it possible to generate the XML source file from question 1 (see above) based on an existing database in MySQL ?
As far as I know, XML is not suitable for developing database structures. However can we say that XML is a language to demonstrate hierarchical structures and a MySQL database also shows a hierarchical structure, so in fact it is suitable for database development?
Thank you very much!
You can certainly store XML data in MySQL. You can also use any number of approaches to converted hierachical XML data into individual relational database field representations.
I would however say that if you just want to work with intact XML documents, you might look to go the NoSQL route, which is really better suited for this type of data storage. You also might consider JSON as the format for storage as it is more concise (saves space and transmissions badnwidth) and is more aligned with the popular NoSQL data stores out there.
1) yeah there is a way, but you should check out mongodb if you want a dynamic database structure, it was developed with that in mind. also, unless you need the rss features of xml or something similar, you might want to consider using json as a format for you documents.
2) json and mongodb work very well together to quickly and easily get documents in and out of the db. you can technically do it in mysql as well, but you might spend more time scripting in php or ruby to get the desired format you want.
3) you could use xml to demonstrate your db structure because of it's loose structure, but i'm not sure it would be intuitively clear to others. hard to say, really depends on how you implement it and how complicated your db structure is going to be.
I have a few XML files containing data for a research project which I need to run some statistics on. The amount of data is close to 100GB.
The structure is not so complex (could be mapped to perhaps 10 tables in a relational model), and given the nature of the problem, this data will never be updated again, I only need it available in a place where it's easy to run queries on.
I've read about XML databases, and the possibility of running XPATH-style queries on it, but I never used them and I'm not so comfortable with it. Having the data in a relational database would be my preferred choice.
So, I'm looking for a way to covert the data stored in XML into a relational database (think of a big .sql file similar to the one generated by mysqldump, but anything else would do).
The ultimate goal is to be able to run SQL queries for crunching the data.
After some research I'm almost convinced I have to write it on my own.
But I feel this is a common problem, and therefore there should be a tool which already does that.
So, do you know of any tool that would transform XML data into a relational database?
PS1:
My idea would be something like (it can work differently, but just to make sure you get my point):
Analyse the data structure (based on the XML themselves, or on a XSD)
Build the relational database (tables, keys) based on that structure
Generate SQL statements to create the database
Generate SQL statements to create fill in the data
PS2:
I've seen some posts here in SO but still I couldn't find a solution.
Microsoft's "Xml Bulk Load" tool seems to do something in that direction, but I don't have a MS SQL Server.
Databases are not the only way to search data. I can highly recommend Apache Solr
Strategies to Implement search on XML file
Keep your raw data as XML and search it using the Solr index
Importing XML files of the right format into a MySql database is easy:
https://dev.mysql.com/doc/refman/5.6/en/load-xml.html
This means, you typically have to transform your XML data into that kind of format. How you do this depends on the complexity of the transformation, what programming languages you know, and if you want to use XSLT (which is most probably a good idea).
From your former answers it seems you know Python, so http://xmlsoft.org/XSLT/python.html may be the right thing for you to start with.
Take a look at StAX instead of XSD for analyzing/extraction of data. It's stream based and can deal with huge XML files.
If you feel comfortable with Perl, I've had pretty good luck with XML::Twig module for processing really big XML files.
Basically, all you need is to setup few twig handlers and import your data into MySQL using DBI/DBD::mysql.
There is pretty good example on xmltwig.org.
If you comfortable with commercial products, you might want to have a look at Data Wizard for MySQL by the SQL Maestro Group.
This application is targeted especially at exporting and, of course, importing data from/ to MySQL databases. This also includes XML import. You can download a 30-day trial to check if this is what you are looking for.
I have to admit that I did not use the MySQL product line from them yet, but I had a good user experience with their Firebird Maestro and SQLite Maestro products.
I have an existing Schema definition in MySql database. I created the schema using MySql Workbench.
I wish to access the schema from my Lift-Scala-Squeryl code. I know that a simple way would be to manually define the schema structure using Squeryl data objects.
Is there an automated way to generate Squeryl data objects out of existing MySql schema?
I've found the following general question, but I'm sure there can be a way to generate a naive structure, although not accurate, it will allow a better starting point for the manual work.
Thanks, David.
Max, Squeryl's creator, had suggested that this would be a good idea a while back. Here is the google group discussion.
You may not be too pleased with me for this, but I think I talked him out of it :) So, to my knowledge, there isn't a way to do it. Besides the issues I pointed out in that thread, the fact that Squeryl can work in multiple modes (primitive types, custom types, lift record types) it would be a difficult thing to do and get right for everyone.
I am looking out for a solution to migrate data from Progressdb to MySQL..Please let me know if there are any solutions for the same.Thank you.
If this is a one time thing then the answer above is probably best (dump to ascii and import, or link the tables).
If it is more of a replication oriented problem then you might find http://www.bravepoint.com/products-pro2-replication-suite.shtml to be helpful.
Some possibilities
Export to flat file and import to MySQL
link tables from both databases in Microsoft Access via ODBC, and then xfer data using SQL