SQL Server Reporting Services (SSRS): Default Values

Introduction

This tutorial explores the use of default values in SQL Server Reporting Services (SSRS). Default values provide a way to pre-fill parameters in a report, offering users a starting point for customization.

Using Default Values in SSRS

Syntax

Default values in SSRS can be set for report parameters in the following ways:

1. Static Values:

   ="DefaultValue"
   

2. Dataset Values:

   =First(Fields!FieldName.Value, "DatasetName")
   

Example

Consider a report parameter named StartDate with a default value set to the first day of the current month:

=DateSerial(Year(Today()), Month(Today()), 1)

Output

When users run the report, the StartDate parameter will be pre-filled with the default value, which is the first day of the current month.

Explanation

• Static Values: Directly specify a default value using expressions or constants.
• Dataset Values: Retrieve a default value from a dataset, such as the first record's field value.

Use

• User Convenience: Provide users with a starting point for report customization.
• Default Filter Values: Set default values for parameters used as filters.
• Dynamic Defaults: Use dataset values for dynamic default values based on data.

Important Points

• Default values are applied when a report is initially loaded or when a user resets the parameter to its default state.
• Ensure the default value expressions are valid and compatible with the data type of the parameter.
• For dynamic defaults, the dataset should be available and populated when the report is loaded.

Summary

Default values in SSRS enhance the user experience by providing a predefined starting point for report parameters. Whether using static values or values derived from datasets, understanding how to implement default values is valuable for creating user-friendly and dynamic reports.