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Freeware
Lite edition of VolgaDB Engine (Delphi, C++Builder) consists
of TVolgaTable and TVolgaDatabase components.Main Features:
- all standard properties,
methods,events of TDataSet, it can works with any visual
DB-aware controls
- fast native access to data
without BDE and compact file format, supporting strings,
numbers, dates, memos, images, etc.;
- record range and filter,
master-detail relationship;
- sort-on-the-fly in
ascending and descending order, record search, context find,
locate and lookup;
- cached updates;
- copying of the current
record to a new one;
- temporary in-memory tables
that can later be saved in a file;
- cloning of another
TVolgaDataset, batch move operation;
- loading and saving files
in Volga format, automatic backup;
- callback events for
indication loading process;
- borrow structure and save
to file at design time;
Additional
capabilities of Professional edition of VolgaDB Engine
(Delphi, C++Builder, Kylix):
- password protection with
ciphering;
- autoincremental fields
support;
- reverting records, show
deleted records, OldValue property for fields, IsChanged
property;
- check key violation, check
existing duplicate records with same field values
- loading and saving files
in Volga in stream
- FindFirst, FindNext,
FindPrior, FindLast, FindNearest, GotoNearest, filter as
expression;
- save external objects in
RecordData property for any record;
- save any arbitrary text
within Volga table.
- group operations: sum
field values over all records, get list of values from
records selected in event handler.
- exporting data to text,
DBF, XML, Excel files;
- importing data from text
files;
- creating a new table
aggregating ("group by") another table;
- TVolgaQuery executes SQL
queries in Volga database (Volga files located in one
directory) or in opened Volga datasets in memory. SQL
language is a subset of standard ANSI SQL;
- edit, sort, range,
master-detail, filter operations on query result as a table;
- cached updates which can
be saved in one (original) table;
- restructuring tables in
code;
- version for Kylix 3.
Enterprise
edition of VolgaDB Engine (Delphi, C++Builder) can connect to
MS SQL, MySQL and MS Access (*.mdb) databases.
Main features:
- all capabilities of Lite
and Professional editions;
- supported databases: MS
SQL (using SQL client), MySQL, MS Access, dBASE, Paradox,
ODBC (using DAO)
- fast access to database
over a local-area network or remote databases via modem
connection
- cached updates and all
other capabilities of Volga datasets
- non-changed client-side
application when database format is changed.
- no any additional
technologies (BDE, MIDAS, CORBA, MTS, DCOM, etc.).
- special VDDS.exe utility
for managing data from MS SQL, MySQL and MS Access databases
- can export data from full
table to "insert" SQL script text or can create "update" SQL
script containing only changed, inserted and deleted records
in one transaction.
- can use VolgaDB server
application on remote computer and special key file with
digital signature for limit number of users or period of
work. This way of work does not need installed MSSQL client
or Jet Engine (DAO) on each client computers. You can
generate key file with VolgaKey utility in registered
version.
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