Query Data

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Articles in this Section

• Fetch and Display Data from the Database

  Fetching data from the database using Aggregates.

• Filter Query Results

  When designing queries, you can add conditions to filter sets of records returned by aggregates to choose the database content you want to display.

• Sort Results in an Aggregate

  Use fixed and dynamic sorting in Aggregates to display records on your application screens following a customized sorting the records they return.

• Calculate Values from Grouped Data

  Use aggregate functions to calculate values based on groups of identical data.

• Aggregate a Column into a Single Value

  Use aggregate functions on a column to calculate a single value.

• Implement asynchronous data fetching using Aggregates

  Use Aggregates with Fetch properties set to On Start and Only on demand, to implement asynchronous calls to the database. This creates a fast UI.

• Create a Calculated Attribute in an Aggregate

  How to create a new attribute to a data query and base its value on the other record's attributes.

• Get Distinct Values from the Database

  Use an aggregate with grouped columns to obtain only the distinct values of entity attributes.

• SQL Queries

  Use the SQL element to write and execute custom SQL queries.