Tutorials

Query with table joins

An example of query which require to define a table join(s) in case of using SQL. It's much more simple with EasyQuery.

Data Model Editor

About Data Model Editor

Here you can find detailed information about this instrument and guideline, how to use it to perform all needed tasks.

Data Model

In short (and by its name), data model - is a model (representation) of some data stored in your database. It solves two major problems: Presents the data to the end user in a more friendly and familiar way. Contains some meta information that helps EasyQuery components to build query statements in SQL or other query languages. Any data model contains the following main sections:

Previous versions' tutorials (obsolete)

This section contains the tutorials that we written for older versions of EasyQuery and most probably are obsolete now.

Value Editors

Here you can find the full list of editors and choose any you need in your work with Data Model:

Simple query over one table

How to build a simple query with 1-2 conditions over one table (entity)

Table class

Table class represents one table in a [Korzh.EasyQuery.Db.DbModel](api-reference-4x/korzh-easyquery-db-namespace/dbmodel-class) object

Table class

Table class represents one table in a [Korzh.EasyQuery.Db.DbModel](api-reference-5x/korzh-easyquery-db-namespace/dbmodel-class) object

Table class

Table class represents one table in a [Korzh.EasyQuery.Db.DbModel](api-reference/korzh-easyquery-db/korzh-easyquery-db-namespace/dbmodel-class) object

Aggregate data

From this article you will see how to aggregate (count, sum, etc.) data in your queries.

Query with OR operators

In this article, you will learn how to build queries that contain both AND and OR operators.

Working with several data models

All EasyQuery demos works with one data model (and one database which corresponds to that model). Here we are going to describe how to add a selector that switches between two data models on your view/page and then how to setup a custom "model loader" to handle GetModel requests propertly. To make it possible to switch between these two models we need some selector element on our page. The only problem here - is to switch the database connection accordingly the the switches between the models. Now when the user selects an item in our model selector element on the client-side - our server-side code automatically loads the selected model and connects to a proper database (when necessary)..

Query with a subquery

How to build queries with subqueries using EasyQuery.

Tables and links page

Learn how to work with tables and links within your Data Model, change and edit them.

Working with table aliases

In this article, we provide all the information needed to use aliases properly. There is an explanation, what for aliases are in the DME and an example of using it.

Create a query with sub-query by code

Example with code

Possible ways of data model creation and loading

EasyQuery components need a [data model](/$aid/03bc06b0-83ec-4040-97ef-a50ca004177f) (a user-friendly representation of your DB) for their work. There are several different ways to create the model and load it on your project's startup. This article will describe all of them in detail.

Common SQL queries