Fast and Simple Database App Development and Deployment to Linux in RAD Studio

The Devart company released UniDAC with support for Linux 64-bit platform. UniDAC makes application development and maintenance easier and simpler because the use of the Direct mode in a custom application does not require the installation of client libraries, additional drivers, etc. This helps to avoid the overhead when accessing a DBMS, hence increasing performance.


Increasing SQLite Performance

One the major issues a developer encounters when using the SQLite DBMS in his applications is its performance issue.

Perhaps, a classic case everyone gets into when using SQLite for the first time is very slow execution of multiple INSERT/UPDATE/DELETE operations. Indeed, sequential executions of not even thousands, but hundreds of INSERTs into a table may take too long. (more…)

Using Batch Updates in Delphi Data Access Components

Data amount processed by modern databases grows steadily. In this regard, there is an acute problem – database performance. Insert, Update and Delete operations have to be performed as fast as possible. Therefore Devart provides several solutions to speed up processing of huge amounts of data. So, for example, insertion of a large portion of data to a DB is supported in the Loader. Unfortunately, Loader allows to insert data only – it can’t be used for updating and deleting data.


Using Oracle Optimizer Hints in Entity Framework

With each new version of our Devart dotConnect for Oracle ADO.NET Entity Framework provider we pay special attention to improving its performance and configurability. It is pertinent to note some recent improvements: batch updates and flexible customization of Oracle Entity Framework provider behaviour. And now we are glad to present Oracle optimizer hints support in Entity Framework – a new feature for flexible tuning of SQL queries, generated by a user application.

Oracle Optimizer Hints

Oracle supports more than 60 different Oracle optimizer hints. You can see the complete list of Oracle optimizer hints and recommendations on their use in the Oracle Database documentation.

It is better to perform query optimization in external application, such as Devart dbForge Studio for Oracle, or any other tool for Oracle that you prefer. Queries, generated by Entity Framework, can be traced with dbMonitor and then copied and pasted to your SQL development application, where you can evaluate query performance, study execution plan, and choose optimizer hints to use. (more…)

New Features of Entity Framework Support in dotConnect Providers

In the new version of Devart dotConnect ADO.NET providers for Oracle, MySQL, PostgreSQL and SQLite we have significantly extended functional capabilities of Entity Framework. We maximally fulfilled requests of our users, including those received via our new UserVoice. Our users mainly requested new functional features, more flexibility in behavior and configuration as well as better performance.

Table-per-Type vs Table-per-Hierarchy Inheritance

In this article we will compare the performance of both most used inheritance types – Table-per-Hierarchy (TPH) and Table-per-Type (TPT), supported by LinqConnect starting from version 2.00. For a better understanding of these inheritance types, we will use the Model First approach when the object model is developed first and after that the database scheme is generated.

To develop an object model, the Entity Developer tool will be used.

Our tests are performed on the following object model:

We have a hierarchy of three entity classes: the base class Gadget and its descendants – MobilePhone and Netbook.

SQL Complete: Parsing performance improved!

Recently we have released a free SQL Complete tool that provides IntelliSense and script layout for SQL Server. If you like IntelliSense in Visual Studio and write T-SQL, you’ll probably appreciate the productivity improvements with SQL Complete.

Dare compare your data much more faster!

We compared some best-of-breed data comparison tools with dbForge Data Compare to find out which one is faster to compare and synchronize data in SQL Server databases.

The participant tools were tested with default settings on live databases on SQL Server 2008 that installed with default settings on a desktop (with a dual-core processor and 2Gb of RAM). Both the SQL Server and the SQL tools were installed on the same desktop.

Live Databases:
Two databases with total size of 1Gb: 115 tables containing one with 3 million records of numeric and string data types, the other with middle size BLOB data.

Task №1: We measured the speed of each tool while comparing the data, generating an update script, and at last synchronizing the databases.

Data Comparison/Synchronization Performance

Data Comparison/Synchronization Performance

Result №1: Tests results show that dbForge Data Compare for SQL Server v2.00 has leaved the competitors far behind.

Task №2: We decided to compare the performance of the selected participant tools based on the main industry-leading competitor’ performance. Besides we took into account the product price and tried to calculate the efficiency as best performance for less money.



Result №2: This graph shows that not all the tools can be proud of delivering an expected combination of best performance and best price. dbForge Data Compare handles this task well.

Check Shot

To fully complete our research, we decided to go the whole hog and use the aforementioned tools to compare large databases with the size of 120Gb (some tables in these databases have 2.4 billion records, some tables contain 1.5Gb of LOB data, the FILESTREAM table is with 5.3Gb of records). dbForge Data Compare was good at comparison, while neither of the competitive tools compared tables with LOB data and records in the FILESTREAM table. When we excluded such tables, only one tool coped with 2.4 billion records.
Speed rate of dbForge Data Compare is several times higher than other popular competitive tools have.

Try dbForge Data Compare on your database. Delivering qualitative data comparison and synchronization is our fame.

We guarantee quick support and product improvement if dbForge Data Compare fails to compare and synchronize your database. We even may give you the product license for free.

Moreover, you can take full advantage of data comparison and synchronization functionality in dbForge Compare Bundle that includes both dbForge Data Compare for SQL Server and dbForge Schema Compare for SQL Server, and also allows you to save money as compared to buying the tools separately.

We compared some best-of-breed comparison tools with dbForge Data Compare 2.00 to find out which one is speedier to compare and synchronize data in SQL Server databases.

The participant tools were tested with default settings on live databases on SQL Server 2008 that installed with default settings on a desktop with a dual-core processor and 2Gb of RAM. Both the SQL Server and the tools were installed on the same desktop.