Tutorials

Query with OR operators

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

Previous versions' tutorials (obsolete)

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

Operator class

Represents a logical expression or predicate, like comparisions or LIKE predicate.

Operator class

Represents a logical expression or "predicate". For example: "less than", "is equal to", "starts with".

Operator class

Represents a logical expression or "predicate". For example: "less than", "is equal to", "starts with".

Operators page

This article defines operators which can be used in conditions (such as 'is equal to', 'less than' and others).

Query with a subquery

How to build queries with subqueries using EasyQuery.

Create a query with sub-query by code

Example with code

Common SQL queries

Query.Error class

Query exception class.

Query class

Represents internal query structure.

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.

Store queries in a database

Here we describe the case when all users of some web application create their own queries and would like to store those queries in some database.

Query class

Represents internal query structure.

Paging in query results

Paging can make your work with query more convenient. And here is detailed instruction on how to use it.

Simple query over one table

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

Generating queries for 2 (or more) databases

Here you can find tricks for executing this task

Navigate through query conditions

A code snippet which demonstrates how to run through all conditions in your query

How to save/load queries to/from database

Find out how to change this default behavior and save/load queries to any other storage