Search Results for "sql algebra"
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Showing 15 open source projects for "sql algebra"
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Mycat2
MySQL Proxy using Java NIO based on Sharding SQL, Calcite
Open source intermediate for the MySQL database network protocol written in Java language, open source of GPLv3 protocol. Custom Calcite distributed query engine, edit SQL to relationship algebra expression, rule optimization engine, and cost optimization engine, generate physical execution plan, support logic view. Any cross-currant cross-table join query, support cross-currant cross-table non-associated query, support cross-currant cross-table association query, support cross-currant cross... -
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Datalog Educational System
Deductive Database with Datalog, SQL, RA, TRC, DRC
The Datalog Educational System (DES) is a deductive database with Datalog, SQL, Relational Algebra, Tuple Relational Calculus and Domain Relational Calculus as query languages developed mainly for education. It can be used from most common Prolog interpreters over any supported OS and from portable executables (Windows, Linux and MacOS). -
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Raquel Database System
RAQUEL : "Relational Algebra Query, Update and Executive Language"
The project has 2 related sets of aims. As a language, RAQUEL is to : 1. be a pure relational algebra language (unlike SQL) as defined by Date & Darwen's "The Third Manifesto"; 2. incorporate a generalised extension of the ANSI-SPARC 3-layer DB architecture; 3. have the maximum ratio of functionality to conceptual complexity (as defined by Fred Brooks). As a DBMS, RAQUEL is to : 1. have an Open Architecture, enabling a variety of DBMS configurations of 'black box' code, each... -
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Universal Java Matrix Package
sparse and dense matrix, linear algebra, visualization, big data
The Universal Java Matrix Package (UJMP) is an open source Java library which provides sparse and dense matrix classes, as well as a large number of calculations for linear algebra such as matrix multiplication or matrix inverse. Operations such as mean, correlation, standard deviation, replacement of missing values or the calculation of mutual information are supported, too. The Universal Java Matrix Package provides various visualization methods, import and export filters for a large... -
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Springbok
Educational Query Tool for Relational Databases
Relational Algebra is a very important formal language associated with relational databases. This is why most of the universities have Relational Algebra as an integral part of their database management courses. But unfortunately, most of the traditional relational DBMS software tools support Structured Query Language (SQL) only. For a student it is very difficult to know whether a relational algebra query written on paper is correct or not. Also as an instructor it is difficult to evaluate... -
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Search-Spider
A controllable search engine written in Perl
This software is an enhanced version of code authored by Manu Konchady and published in Dr Dobbs in 2007. This code is best described as experimental (ver .00). It is also inefficient, clumsy, and slow. You will need at least a working knowledge of Perl, postgresql and sql, and of boolean algebra, just to get it to run in its present form, and it runs only on Linux. So why bother? Perhaps you want to find out how a search engine works; You may be curious and want to estimate... -
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SQLToAlgebra
Translate SQL queries into relational algebra
A java library that translates SQL into relational algebra. Includes a demonstration program using the library. Supports a subset of SQL-92. Version 7.1.8 as of January 2015 -
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assassin-creed
change simple query to relation algebra
this is my compiler project with my best friend Alireza Alijani .it easy change query to relation algebra picture with Latex . با سلام به دوستان این پروژه ی من و آقای علیرضا علیجانی در درس کامپایلر است کوئری پایگاه داده را یه تصویر جبر رابطه تبدیل می کند -
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Snifflib Numerical Library
Open-source computational library written in pure JAVA
The Snifflib numerical library provides honest-to-goodness N-dimensional array construction and manipulation along with standard linear algebra functionality as well as statistics and computational routines in the JAVA language. -
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Stack: a System for Teaching and Assessment using a Computer algebra Kernel. This project provides tools for integrating computer algebra functions into learning and teaching systems. Please note that we have moved development of STACK to github, see https://github.com/maths/moodle-qtype_stack
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This Software takes an text with algebra symbols and converts it to real sql, which then may be run with an extra database backend like mysql or postgresql.
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The Visual Query Builder for Preference Algebra lets you formulate a statement for variuous query languages (e.g. Preference XPath, Preference Algebra, Preference SQL) by using visual constructs and mechanisms like drag&drop.
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AlgebraDB is database in Java. We are looking for volunteers which would like participate in this project as developers. We are planning to develop transaction system, network communication, simple GUI management system and SQL translation into AlgebraDB.
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esProc SPL
An intriguing programming language and a data computing middleware
... times. When working as a data warehouse, esProc SPL does not adopt the relational algebra-based SQL syntax. It invents an algebraic system called discrete data set instead: SPL: a database language featuring easy writing and fast running to solve the problems of hard-to-code complex SQL. You are welcome to post your troubles and problems when trying to achieve high performance computing and discuss with us to find a solution.
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