Understanding Lookup Activity in Azure Data Factory Lookup activity is a crucial tool for reading and returning content from configuration files or tables, often used to solve business problems. It retrieves data such as query results or table contents, which can then be passed into pipelines for transformations. For example, if an employee resignation table contains IDs of employees who resigned this month, lookup activity fetches these IDs to perform subsequent actions like deleting corresponding records from the main employee table.
Implementing Lookup with For Each and Stored Procedure To delete specific entries based on fetched data using Azure Data Factory: first use lookup activity to retrieve all relevant IDs (e.g., 3, 4, 5) from the resignation table. Then employ 'For Each' activity to iterate through each ID while invoking a stored procedure that deletes matching rows in the primary employee database. This process ensures dynamic handling of multiple inputs efficiently within one pipeline execution.