SQLJet is an independent pure Java implementation of a popular SQLite database management system. SQLJet is a software library that provides API that enables Java application to read and modify SQLite databases.
SQLJet does not support SQL queries; there is an API to work with the database on a lower level.
Drizzle is a community-driven open source project that is forked from the popular MySQL database. The Drizzle team has removed non-essential code, re-factored the remaining code and modernized the code base moving to C .
Squeryl
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A Scala ORM and DSL for talking with Databases with minimum verbosity and maximum type safety
Write compiler validated statements.
Squeryl statements that pass compilation won’t fail at runtime. Refactor your schema as often as is required, the Scala compiler and your IDE will tell you exactly which lines of code are affected.
Never repeat yourself
The Composability of Squeryl statements allows you to define them
once and reuse them as sub queries within other statements.
Write declaratively
Write as declaratively as SQL, only with less boilerplate. SQL’s declarativeness is preserved, not encapsulated in a lower level API that requires imperative and procedural code to get things done.
Explicitly control retrieval granularity and laziness
A significant part of optimizing a database abstraction layer is to choose for every situation the right balance between fine and large grained retrieval, and the optimal mix of laziness and eagerness. Data retrieval strategies are explicit in Squeryl rather than driven by configuration like current generation Java ORMs read more
DBpedia is a community effort to extract structured information from Wikipedia and to make this information available on the Web. DBpedia allows you to ask sophisticated queries against Wikipedia, and to link other data sets on the Web to Wikipedia data. We hope this will make it easier for the amazing amount of information in Wikipedia to be used in new and interesting ways, and that it might inspire new mechanisms for navigating, linking and improving the encyclopaedia itself.
Xml based metalanguage for a database schema definition. The following artifacts could be generated from this definition: DDL scripts for various database servers, HTML - documentation, ERD.
Sausalito is a product that enables you to develop, test, deploy, and host scalable web applications in the cloud. On this page, you find some reading material in case you're interested in
* technical details about Sausalito,
* user experience reports, or
* presentations and demos that we gave.
FlockDB is a distributed graph database for storing adjancency lists, with goals of supporting:
* a high rate of add/update/remove operations
* potientially complex set arithmetic queries
* paging through query result sets containing millions of entries
* ability to "archive" and later restore archived edges
* horizontal scaling including replication
* online data migration
Non-goals include:
* multi-hop queries (or graph-walking queries)
* automatic shard migrations
FlockDB is much simpler than other graph databases such as neo4j because it tries to solve fewer problems. It scales horizontally and is designed for on-line, low-latency, high throughput environments such as web-sites.
Twitter uses FlockDB to store social graphs (who follows whom, who blocks whom) and secondary indices. As of April 2010, the Twitter FlockDB cluster stores 13+ billion edges and sustains peak traffic of 20k writes/second and 100k reads/second.
SQLRunner is a simple JDBC Client which helps Java developers with various methods. You can build, test and run select, update and DML statements (also callable statements with out put parameters) and export or import data in/from csv-files or XML-fi
SYMPLiK EXZELLENZ is a Java program to manipulate table data in Oracle database by using Microsoft Excel file. Unlike Oracle WebADI, More4Apps or other Excel-driven solution, this program does not use Office VBA (Macro) to process the data. It is a pure Java solution incorporated with Apache POI and Oracle JDBC driver to download, upload, insert, update and delete data from Oracle database tables.
AutoPatch was born from the needs of using an agile development process while working on systems that have persistent storage. Without AutoPatch, developers usually can't afford the maintenance headache of their own database, and DBAs are required just to apply changes to all of the various environments a serious development effort requires.
The very application of database changes becomes an inefficient, error-prone, expensive process, all conspiring to discourage any refactoring that touches the model, or being a bottleneck when model changes are made.
AutoPatch solves this problem, completely.
With AutoPatch, an agile development process that requires a database change looks like this:
* Developer alters the model, which requires a change to the database
* Developer possibly consults a DBA, and develops a SQL patch against their personal database that implements the alteration
* Developer commits the patch to source control at the same time as they commit their dependent code
* Other developers' and environments' databases are automatically updated by AutoPatch the next time the new source is run
This represents streamlined environment maintenance, allowing developers to cheaply have their own databases and all databases to stay in synch with massively lower costs and no environment skew.
That's what AutoPatch does.
Clusters with one database? Multiple schemas? Logical migrations, instead of just DDL changes? Need to do something special/custom? Need to distribute your changes commercially? All without paying anything? No problem.