About Universal Data Access Components (UniDAC)

A library of nonvisual cross-database data access components for Delphi and C++Builder.

Universal Data Access Components (UniDAC) provides unified access to popular database servers like Oracle, Microsoft SQL Server, MySQL, InterBase and Firebird. Universal Data Access Components (UniDAC) offers unified approach to the database-related applications development process. That means you can switch easily between different databases in your projects without going deep into their specifics. Using Universal Data Access Components (UniDAC) with its server-independent interface lets you easily create cross-database applications. Universal Data Access Components (UniDAC) gives outstanding flexibility and independence to your projects.

Universal Data Access Components (UniDAC) General usability

  • Direct access to server data. Does not require installation of other data provider layers (such as BDE and ODBC)
  • Access without using client library [ Oracle, MySQL ]
  • Interface compatible with standard data access methods, such as BDE and ADO
  • VCL and VCL for .NET versions of library available
  • Separated run-time and GUI specific parts allow you to create pure console applications
  • Unicode support
  • National charset support [ Oracle, MySQL, InterBase ]

Universal Data Access Components (UniDAC) Network and connectivity

  • Disconnected Model with automatic connection control for working with data offline
  • Local Failover for detecting connection loss and implicitly reexecuting certain operations
  • Ability to search for installed servers in a local network [ SQL Server, MySQL ]
  • Connection timeout management [ Oracle, SQL Server, MySQL ]

Universal Data Access Components (UniDAC) Compatibility

  • Full support of the latest server versions
  • Support for embedded server versions
  • Compatible with all IDE versions starting with Delphi 6 and C++Builder 6 except Delphi 8
  • Wide reporting component support, including support for InfoPower, ReportBuilder, FastReport
  • Support for all standard and third-party visual data-aware controls
  • Allows you to use Professional Edition of Delphi and C++Builder to develop client/server applications

Universal Data Access Components (UniDAC) Server-specific features


  • Multiple Oracle Homes support
  • Oracle sequence support
  • Direct LOB access support
  • Temporary LOB management routines
  • Temporary LOBs for updating LOB fields
  • OCI Connection Pooling and Statement Caching
  • Oracle optimizer control

SQL Server

  • Possibility to change application name for a connection
  • Possibility to change workstation identifier for a connection
  • Configuration of OEM/ANSI character translation
  • Enhanced support for SQL Server Compact Edition


  • HANDLER syntax support
  • Possibility to retrieve last auto-incremented value


  • Advanced BLOB support
  • Streaming (non-caching) BLOB access support
  • Advanced generator support
  • Advanced support for the character set OCTETS
  • Support for the Firebird 2 EXECUTE BLOCK syntax
  • Support for the Firebird 2 RETURNING clause
  • Advanced locking for Firebird 2
  • Automatic updates by DB_KEY unique field for Firebird 2
  • Multiple transactions support with the TUniTransaction component

Universal Data Access Components (UniDAC) Performance

  • High overall performance
  • Fast controlled fetch of large data blocks
  • Optimized string data storing
  • Advanced connection pooling
  • High performance of applying cached updates with batches
  • Caching of calculated and lookup fields
  • Fast Locate in a sorted DataSet
  • Preparing of user-defined update statements

Universal Data Access Components (UniDAC) Local data storage operations

  • Database-independent data storage with TVirtualTable component
  • CachedUpdates operation mode
  • Local sorting and filtering, including by calculated and lookup fields
  • Local master/detail relationship
  • Master/detail relationship in CachedUpdates mode

Universal Data Access Components (UniDAC) Data access and data management automation

  • Automatic data updating with TUniQuery, TUniTable, and TUniStoredProc components
  • Automatic record refreshing and locking
  • Automatic query preparing
  • Support for ftWideMemo field type in Delphi 2006 and higher

Universal Data Access Components (UniDAC) Extended data access functionality

  • Separate component for executing SQL statements
  • Simplified access to table data with TUniTable component
  • Ability to retrieve metadata information with TUniMetaData component
  • BLOB compression support
  • Support for using macros in SQL
  • FmtBCD fields support
  • Ability to customize update commands by attaching external components to TUniUpdateSQL objects
  • Deferred detail DataSet refresh in master/detail relationships
  • MIDAS technology support
  • UniDataAdapter component for WinForms and ASP.NET applications
  • Distributed transactions support with the TUniTransaction component [ Oracle, SQL Server ]
  • Default value support for stored procedures
  • RefreshQuick method [ SQL Server, MySQL ]

Universal Data Access Components (UniDAC) Data exchange

  • Transferring data between all types of TDataSet descendants with TCRBatchMove component
  • Data export and import to/from XML (ADO format)
  • Ability to synchronize positions in different DataSets

Universal Data Access Components (UniDAC) Script execution

  • Advanced script execution features with the TUniScript component
  • Support for executing individual statements in scripts
  • Support for executing huge scripts stored in files with dynamic loading
  • Ability to use standard clients tool syntax in scripts

Universal Data Access Components (UniDAC)  SQL Execution monitoring

  • Extended SQL tracing capabilities provided by the TUniSQLMonitor component and DBMonitor
  • Borland SQL Monitor support
  • Ability to send messages to DBMonitor from any point in your program

Universal Data Access Components (UniDAC) Visual extensions

  • Includes the source code of enhanced TCRDBGrid data-aware grid control
  • Customizable connection dialog

Universal Data Access Components (UniDAC) Design-time enhancements

  • DataSet Manager tool to control DataSet instances in the project
  • Advanced design-time component and property editors
  • Automatic design-time component linking
  • Easy migration from BDE and ADO with Migration Wizard
  • More convenient data source setup with the TUniDataSource component
  • Syntax highlighting in the design-time editors

Product clarity

  • Complete documentation sets
  • Printable documentation in PDF format
  • A large amount of helpful demo projects

UniDAC Standard Edition includes the UniDAC common engine, but does not include server-specific data providers. Required providers can be installed with ODAC, SDAC, MyDAC, IBDAC. UniDAC Standard Edition is a cost-effective solution for those database application developers who need only several of supported data providers, or already have some of DACs.

UniDAC Professional Edition includs all UniDAC Standard Edition features with support for four data access providers: Oracle, SQL Server, MySQL, InterBase/Firebird/Yaffil. In addition, UniDAC Professional Edition includes the DataSet Manager tool which is intended to organize datasets in your application.