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.
The new version of Devart Delphi Data Access Components introduces the new mechanism for large data processing — Batch Operations. The point is that just one parametrized Modify SQL query is executed. The plurality of changes is due to the fact that parameters of such a query will be not single values, but a full array of values. Such approach increases the speed of data operations dramatically. Moreover, in contrast to using Loader, Batch operations can be used not only for insertion, but for modification and deletion as well.
Why meaningful test data important?
While developing an application, you need to make sure you are testing it under conditions that closely simulate a production environment. Most tests rely on sample data for testing. If you manually enter data into a test environment, one record at a time using the UI, most probably, you will never build volume and variety of data that your app will accumulate in a few days in production. It is obviously that the behavior will differ. Most likely, the data you insert into a test database will be based on your own usage patterns and will not match real-world usage, leaving significant bugs untested. Read the rest of this entry »
LiteDAC and UniDAC interact with SQLite in 2 approaches. The first approach is that an application uses functions of the linked SQLite library. For Windows OS it is sqlite3.dll, for Mac OS and iOS – libsqlite3.dylib, for Android – libsqlite.so. The second approach allows to connect to the database from the application directly, using so called Direct Mode. Direct Mode provides interaction with SQLite avoiding any external libraries linking. It is implemented by embedding the code of the SQLite library directly to the application. This approach allows to work with SQLite in cases, when using third-party libraries is impossible due to a number of reasons. For example, when developing applications for iOS or Mac OS, the Apple corporation prohibits deployment of any libraries along with the application.
However, there are situations, when it is preferably to use the first mode. Thus, when developing applications for Android, there is no need to worry about SQLite client library presence, since it is included into this OS distribution. On the other hand, during project implementation, strict requirements may be imposed on the compiled application size. Such requirements are especially relevant for mobile development. Therefore, it is highly desirable to have an opportunity to disable modules, that won’t be used in the application, before compilation. LiteDAC and UniDAC allow to exclude the code of the SQLite client library, that implements Direct Mode, from a ready application. As a result, the size of the developed application may be decreased. Read the rest of this entry »
Devart was a Bronze sponsor of the 416th edition of SQLSaturday, that was held on July 25, 2015 in Odessa, Ukraine.
We would like to thank the organizers of the event – Anton Vidishchev, Oleg Chorny and Alex Tumanoff, and all speakers for the remarkable event! We highly appreciated the opportunity to share thoughts and ideas, discuss challenges as well as to present our software products to the professional community. Read the rest of this entry »
While working on the new version of SQL Complete, we focused on adding the most needed features discussed on Devart’s uservoice site – devart.uservoice.com. Here, users leave their feedbacks regarding any of the Devart’s products as well as vote for new features to be added. Thus, we do our best to address user needs for most desirable functionality. This is an early preview of the upcoming functionality that will be available in SQL Complete v5.0!
In this article, we will discuss newly added features that will speed up and simplify SQL code writing. Read the rest of this entry »
Devart was the GOLD sponsor of the SQL Day | Annual Conference of Polish SQL Server User Group, which was held on the 11th – 13th May 2015 in Wrocław, Poland.
We would like to thank the organizers and speakers for the wonderful conference! Our special thanks to Maciej Pilecki and Katarzyna Nieradka for the assistance and warm welcome. We have had a great chance to meet new people, exchange views, and present our software products to the wide audience. Read the rest of this entry »
dbForge Studio for SQL Server gives you an opportunity of automating the variety database management processes. One of them is specifying parameters in a report making use the command line.
The /parameters switch is used to specify values for parameters declared in a query script. To perform this task, you need only type the name of a parameter you want to assign a value to and its correspondent value, like this:
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Since RAD Studio XE7 Update 1 was released, the ETTracker.dll library was added to installation. Its purpose is obscure, but its presence in the installation caused serious problems for Windows XP users when installing RAD Studio XE7 Update 1. Read the rest of this entry »
One of the best ways to gather information about SQL Server workloads is to capture trace information. In this article, we will look at how to use SQL Trace and Server Events Profiler for tracing SQL Server activity. You can use this information for auditing, monitoring and troubleshooting SQL Server performance. This article is intended for DBAs who need to collect information about workloads running on SQL Server for analytic purposes. Read the rest of this entry »