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I have around 10 tabs, each tab would be having all the four operations of CRUD(Create,Read,Update,Delete).
In all the tab while getting the list from server, I have planned to save them in the Database(as I am building a native app).
I read about isolated storage(files and also Local Database) and SQLite.
Regarding SQLite, as it is a third party database,I think it will affect the performance.
So what shall I use??
I heard some recommendations about Sterling DB, but i didn't make a crash-tests for DB yet.
I guess, you should decide more exact, what would be the most often operations. Take a look at performance tests here:
http://www.jayway.com/2010/11/17/performance-of-sterling-database-for-windows-phone-7/
http://www.maxpaulousky.com/blog/archive/2011/07/27/windows-phone-mango-db-engines-performance-testing.aspx
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Looking for graph db which could be alternative for Neo4j, can any one suggest a better one which could be easily integrated with Java application and has better performance in migrating data from MSSQl to that graphdb.
Have you tried http://github.com/thinkaurelius/titan - it's open source, free, supports data distribution.
Also OrientDB looks good.
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I want to know what are the different techniques & tools used for database versioning and migration. I am also interested in saving a snapshot of the data along with the schema changes. Would that be a good practice?
I have come across tools like alembic and sqitch, although I haven't used either. I have around 200 table in PostgreSQL.
Thanks
Read about using Liquibase with PostrgeSQL
Ask you DBA to create data- (or full) dumps, which you store with ALTER-dumps of Liquibase
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I'm looking for a DB embedded solution to deal with a average/medium amount of data (maybe between 100MB to 2GB), and allow concurrent connections, not so much, I believe at least
more than 10 concurrent connections for objects (database, tables) up to fifty or one hundred.
Which options could be achieve these requirements in your opinion and experience?
Firebird can be used embedded. It meets all your other requirements.
For Java you have a choice of three different DBMS:
HSQLDB (aka HyperSQL): http://hsqldb.org
H2 Database: http://h2database.com/html/main.html
Apache Derby (aka. "JavaDB"): http://db.apache.org/derby/
My personal preference is HSQLDB, but H2 is just as good. Both meet the requirements you mentioned.
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We have analytics coming from several different services and need a place to combine all the data in a single display. Does anyone have experience with other services besides leftronic.com?
There are tons of options. Try InfoCaptor, it is free https://my.infocaptor.com
huge visualization library and connects to social analytics as well as databases
PS: I am the developer
We've used Leftronic and were quite satisfied with the product, but have since moved onto Geckoboard because the UI is much more elegant. You might also want to checkout Boarrd.
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Supports C API for reading and writing into the DB.
Support ACID transaction feature.
Support sending notifications if any change happens to DB state.
Finally it should be an open source.
Could someone suggest a open source database which supports all these above features.
Postgres supports those features.
I don't think I understand what you refer to in #3. If you mean triggers, CUBRID could also do the job.