- Ninox Database 2 3 0 – Flat File Database Systems Using
- Ninox Database 2 3 0 – Flat File Database Systems Llc
- Ninox Database 2 3 0 – Flat File Database Systems Pdf
- Ninox Database 2 3 0 – Flat File Database Systems Residential
Later 1 0 2 download free. Entity Framework Core can access many different databases through plug-in libraries called database providers.
Current providers
Ninox is the leading business App for Mac and iOS in more than 50 countries. Ninox Database specializes in database application development and helping teams & organizations create, connect and collaborate with databases in a human friendly way. For any question you might have, please don't hesitate to send us an email: [email protected]. Database providers can extend EF Core to enable functionality unique to specific databases. Some concepts are common to most databases, and are included in the primary EF Core components. Such concepts include expressing queries in LINQ, transactions, and tracking changes to objects once they are loaded from the database.
Ninox Database 2 3 0 – Flat File Database Systems Using
Important
EF Core providers are built by a variety of sources. Not all providers are maintained as part of the Entity Framework Core Project. When considering a provider, be sure to evaluate quality, licensing, support, etc. to ensure they meet your requirements. Also make sure you review each provider's documentation for detailed version compatibility information.
Important
EF Core providers typically work across minor versions, but not across major versions. For example, a provider released for EF Core 2.1 should work with EF Core 2.2, but will not work with EF Core 3.0.
NuGet Package | Supported database engines | Maintainer / Vendor | Notes / Requirements | Built for version | Useful links |
---|---|---|---|---|---|
Microsoft.EntityFrameworkCore.SqlServer | SQL Server 2012 onwards | EF Core Project (Microsoft) | 3.1 | docs | |
Microsoft.EntityFrameworkCore.Sqlite | SQLite 3.7 onwards | EF Core Project (Microsoft) | 3.1 | docs | |
Microsoft.EntityFrameworkCore.InMemory | EF Core in-memory database | EF Core Project (Microsoft) | Limitations | 3.1 | docs |
Microsoft.EntityFrameworkCore.Cosmos | Azure Cosmos DB SQL API | EF Core Project (Microsoft) | 3.1 | docs | |
Npgsql.EntityFrameworkCore.PostgreSQL | PostgreSQL | Npgsql Development Team | 3.1 | docs | |
Pomelo.EntityFrameworkCore.MySql | MySQL, MariaDB | Pomelo Foundation Project | 3.1 | readme | |
MySql.Data.EntityFrameworkCore | MySQL | MySQL project (Oracle) | 3.1 | docs | |
Oracle.EntityFrameworkCore | Oracle DB 11.2 onwards | Oracle | 3.1 | website | |
Devart.Data.MySql.EFCore | MySQL 5 onwards | DevArt | Paid | 3.1 | docs |
Devart.Data.Oracle.EFCore | Oracle DB 9.2.0.4 onwards | DevArt | Paid | 3.1 | docs |
Devart.Data.PostgreSql.EFCore | PostgreSQL 8.0 onwards | DevArt | Paid | 3.1 | docs |
Devart.Data.SQLite.EFCore | SQLite 3 onwards | DevArt | Paid | 3.1 | docs |
FirebirdSql.EntityFrameworkCore.Firebird | Firebird 2.5 and 3.x | Jiří Činčura | 3.1 | docs | |
IBM.EntityFrameworkCore | Db2, Informix | IBM | Paid, Windows | 3.1 | customer website |
IBM.EntityFrameworkCore-lnx | Db2, Informix | IBM | Paid, Linux | 3.1 | customer website |
IBM.EntityFrameworkCore-osx | Db2, Informix | IBM | Paid, macOS | 3.1 | customer website |
FileContextCore | Stores data in files | Morris Janatzek | For development purposes | 3.0 | readme |
EntityFrameworkCore.Jet | Microsoft Access files | Bubi | .NET Framework | 2.2 | readme |
EntityFrameworkCore.SqlServerCompact35 | SQL Server Compact 3.5 | Erik Ejlskov Jensen | .NET Framework | 2.2 | wiki |
EntityFrameworkCore.SqlServerCompact40 | SQL Server Compact 4.0 | Erik Ejlskov Jensen | .NET Framework | 2.2 | wiki |
Teradata.EntityFrameworkCore | Teradata Database 16.10 onwards | Teradata | 2.2 | website | |
EntityFrameworkCore.FirebirdSql | Firebird 2.5 and 3.x | Rafael Almeida | 2.1 | wiki | |
EntityFrameworkCore.OpenEdge | Progress OpenEdge | Alex Wiese | 2.1 | readme |
Adding a database provider to your application
Most database providers for EF Core are distributed as NuGet packages, and can be installed as follows:
Once installed, you will configure the provider in your
DbContext
, either in the OnConfiguring
method or in the AddDbContext
method if you are using a dependency injection container.For example, the following line configures the SQL Server provider with the passed connection string:Database providers can extend EF Core to enable functionality unique to specific databases.Some concepts are common to most databases, and are included in the primary EF Core components.Such concepts include expressing queries in LINQ, transactions, and tracking changes to objects once they are loaded from the database.Some concepts are specific to a particular provider.For example, the SQL Server provider allows you to configure memory-optimized tables (a feature specific to SQL Server).Other concepts are specific to a class of providers.For example, EF Core providers for relational databases build on the common
Microsoft.EntityFrameworkCore.Relational
library, which provides APIs for configuring table and column mappings, foreign key constraints, etc.Providers are usually distributed as NuGet packages.Important
When a new patch version of EF Core is released, it often includes updates to the
Microsoft.EntityFrameworkCore.Relational
package.When you add a relational database provider, this package becomes a transitive dependency of your application.But many providers are released independently from EF Core and may not be updated to depend on the newer patch version of that package.In order to make sure you will get all bug fixes, it is recommended that you add the patch version of Microsoft.EntityFrameworkCore.Relational
as a direct dependency of your application.Developer(s) | Symantec |
---|---|
Initial release | 1985; 35 years ago |
Stable release | |
Operating system | Microsoft DOS, Microsoft Windows |
Type | Flat file database and Word processor |
License |
Q&A was a database and word processingsoftware program for IBM PC-compatible computers published by Symantec and partners from 1985 to 1998. It was written by a team headed by Symantec founder Dr. Gary Hendrix,[1][2] Denis Coleman, and Gordon Eubanks.
Released by Symantec in 1985 for MS-DOS computers, Q&A's flat-file database and integrated word processing application is cited as a significant step towards making computers less intimidating and more user friendly. Among its features was a natural language search function based on a 600 word internal vocabulary.[1]
Product evolution[edit]
Q&A Software was originally a natural language research project, involving a group of former SRI International researchers led by Dr. Earl Sacerdoti and Dr. Gary Hendrix,[2] funded first by the National Science FoundationSmall Business Innovation Research Program, and later by venture capital investors including Kleiner Perkins,[1][3] Q&A evolved into both a useful business productivity tool and the foundation of Symantec.[1] The now-famous professional poker player Barry Greenstein worked on the Q&A word processor during his employment at Symantec.
Dr. Hendrix mused that only time would tell whether Q&A's integrated natural language ability would be merely a passing fad or perceived as a valuable feature.
The product gained popularity and generated nearly $1.4 million in 1985.[1]
By the end of fiscal 1989, after Version 3's release, Q&A accounted for nearly a third of Symantec's $50 million revenues, occupying the top spot in the flat-file database market in 1991.[1]
Version 1.0 and 1.1[edit]
Q&A 1.0 manual
Version 1.0 came out in November 1985. It was designed to look and work like pfs:File and pfs:Write. It had the natural language capability to answer English questions about the database.
Version 2.0[edit]
Version 2 came out in late 1986. It included a 'Recover' function to make damaged databases usable again and expanded capabilities to import data from dBase II and III and Lotus 1-2-3.[4] The software had been prepared for internationalization, and a German version (called F&A (in German)) came out followed by release in several other languages.
Ninox Database 2 3 0 – Flat File Database Systems Llc
Version 3.0[edit]
Version 3.0 was released in the spring of 1988. Users of this version could simultaneously use a database on a local area network. Data records were locked so that users could be editing different records at the same time. If user A were editing a record it was locked from other users who would see a message saying user A was editing it and would not be able to edit it themselves. Stored reports and other specifications could be edited at the same time also with the same mechanism. Reports could be run and even if they ran slowly their results would be drawn from a consistent set of data as it appeared at the time the report began to execute, rather than include edits made during the time the report ran. This multiuser functionality was described by Symantec as new to the low-end PC database market.
With a function called XLOOKUP, Q&A 3.0 could be programmed to bring values from an external database into the currently open one—a step toward relational database functionality.[5][citation needed]
Version 4 for DOS and for Windows[edit]
Box for Q&A 4.0 for DOS
Released for Windows in 1993,[6] Version 4.0 boasted a plethora of new features, including both Form View and Spreadsheet View, the ability to choose file names from a dialog box, and a simple control panel (favorably compared to the controls of a VCR).[7]
Symantec attempted to develop a Macintosh version of Q&A at the same time as their Windows effort. This occurred at their Monterey Development Center. It would have been a functional equivalent with a Macintosh flavour. Sadly, they were unable to complete the project and it was scrapped.
Perhaps more anticipated was an improvement on Q&A's original natural language technology which appeared in the Windows version. Called DAVE – Do Anything Very Easily – in 4.0, the natural language query feature was possessed of two aspects: Intelligent Assistant, which allowed users to navigate easily amongst records using basic English queries created by clicking entries in the toolbar, and Scripting Assistant, which permitted the creation of scripts within the application to automate commonly used, repetitive tasks, as opposed to the keystroke recorded macros used by the DOS version.[7]
Version 4.0 included a fully functional word processor – Q&A Write – that could be launched from Q&A or used as a stand-alone application. Q&A Write featured a 100,000 word spell check, a 660,000 word thesaurus, a dictionary, formatting options such as page layout, columnar formatting, automatic page numbering and headers, as well as support for the addition of graphics. Additionally, it offered multifont printing support and the ability to hot-link elements of a Lotus 1-2-3 document, Symphonyspreadsheet or Lotus PIC graphs, to Q&A Write documents.[7] Macros could be stored in an ASCII text file created with a text editor, Q&A Write or by recording keys; the Macro Menu could be accessed from many locations by pressing Shift-F2.
Noted SF author and Chaos Manor creator Jerry Pournelle wrote fondly of Q&A Write, claiming it as his sole word processor.[8][9]
In keeping with previous versions, Q&A 4.0 was fully backward compatible, allowing users to easily access data created in prior versions of the software. 4.0 is largely considered “classic” Q&A.
The (customer) contact management software ACT!, another earlier Symantec product now being continued by the SAGE group, also had the ability to read Q&A datafiles. Ams ringtone maker 2 0 0.
Last Years[edit]
In 1994, Symantec announced that it would no longer continue to develop Q&A. Amid public outcry, particularly from the Q&A User Group, Symantec was forced to reconsider and commissioned PFP Software GmbH of Düsseldorf to develop an upgrade to the DOS version.[10] Released in 1995 first only in Europe, then later in the USA in response to demands from the extremely vocal user base,[11] Andreas Göbel's [12] Version 5.0 addressed interoperability issues, added more user control over form colors and introduced the ability to Copy/Paste between fields.
Although Symantec continued to sell both Versions 4.0 and 5.0, neither was actively marketed,[13] and in September, 1998, all sales and support of Q&A were halted.[11]
Alternative application[edit]
Shortly before the cessation of Q&A sales, a joint venture between Professional Computer Technology Associates (PCTA) and Marble Publications led by longtime Q&A users William Halpern and Tom Marcellus began negotiating with Symantec to address the issues facing long-term Q&A users. By the time Q&A sales and support had been halted, Symantec was actively referring users with questions to the venture – sales inquiries to PCTA, support inquiries to both PCTA and Marble Publications.[11]
Recognizing that Q&A would lapse into obsolescence as advances in hardware and software moved forward, Halpern and a group of Q&A 'power users' began meeting in 1999 to address the possibility of developing a new product – compatible with Q&A databases – to allow users to migrate seamlessly without losing their important data. In 2000, Halpern's group became Lantica Software, LLC, which released its first version of Sesame Database Manager in 2003.[11]
See also[edit]
References[edit]
- ^ abcdefAnswers.com on Symantec
- ^ ab'Archived copy'. Archived from the original on February 14, 2007. Retrieved February 28, 2007.CS1 maint: archived copy as title (link)
- ^'Archived copy'(PDF). Archived from the original(PDF) on 2006-02-19. Retrieved 2007-03-13.CS1 maint: archived copy as title (link)
- ^Mace, Scott. Symantec's Q&A 2.0 Includes Tighter Lotus Integration, PFS Rebate Offer. Infoworld, October 13, 1986. Online at google books.
- ^Ewing, David Paul; and Bill Langenes. 1988 Using Q&A. Que Corp.; see references to XLOOKUP in this google books search.
- ^'Q&A Software'. KeywordSoftware.com.
- ^ abchttp://findarticles.com/p/articles/mi_m1563/is_n4_v12/ai_15096965
- ^Byte, Oct 1995Archived July 8, 2007, at the Wayback Machine
- ^Byte, Aug 1994Archived April 6, 2007, at the Wayback Machine
- ^keywordsoftware.com
- ^ abcdLantica Software Company Profile
- ^J2B.DE - Java to Business - PFP Software GmbH
- ^DOS or Windows
Ninox Database 2 3 0 – Flat File Database Systems Pdf
External links[edit]
Ninox Database 2 3 0 – Flat File Database Systems Residential
Retrieved from 'https://en.wikipedia.org/w/index.php?title=Q%26A_(Symantec)&oldid=980475486'