SSRS - How to use LookUp, LookupSet and MultiloopUp functions

In this tutorial, you will learn "How to use LookUp, LookupSet and MultiloopUp functions" in Microsoft Reporting Services.

🚀In SQL Server Reporting Services (SSRS), LookUp, LookupSet, and MultiLookup functions are used to retrieve data from datasets based on specified criteria.

🔍 Lookup Function: This function retrieves the value of a specified field from a dataset that is related to the current dataset based on a specified relationship. It returns a single value.

🔍LookupSet Function: This function retrieves a set of values from a dataset that is related to the current dataset based on a specified relationship. It returns an array of values.

🔍MultiLookup Function: This function is used to retrieve a set of values from a dataset that matches multiple criteria. It returns an array of values.

These functions are typically used in expressions within SSRS reports to perform lookups across datasets. They can be particularly useful when you need to combine data from different datasets based on some common criteria. However, it's important to note that these functions can impact performance, especially if used in large datasets or in complex expressions. So, it's recommended to use them judiciously and consider performance implications.

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