How can Oracle’s LISTAGG functionality be replicated in Apsona reports to combine multiple child records into a single parent row?

Although Apsona does not provide a native LISTAGG function like Oracle, the same outcome can be achieved by combining Multi-Step Reports (MSR), Column Blocks, and Calculated Fields, when configured correctly.

The goal of LISTAGG-style reporting is to display one row per parent record, while aggregating multiple related child records into a single concatenated text field. For example, instead of showing multiple rows for each interaction or note, the report displays a single parent row with all related details combined into one column.

Recommended Approach:

To replicate LISTAGG behavior in Apsona:

  1. Use a Multi-Step Report (MSR)
    Step 1: Select the parent object (e.g., Contact, Account, Person).
    Step 2: Add the child object (e.g., Contact History, Notes, Activities).

  2. Ensure Proper Step Linkage

    • The child step must be linked using a Record ID or lookup field, not a text field such as Name.
    • Column Blocks and auto-fill features only work with true parent-child (one-to-many) relationships based on IDs.

  3. Enable Column Blocks

    • Column Blocks flatten multiple child rows into horizontal columns instead of repeating rows.
    • This is essential for consolidating multiple child records into a single parent row.

  4. Create a Calculated Field

    • Use a calculated field (JavaScript-based) to concatenate multiple child values (such as dates and notes) into a single string.
    • This field effectively mimics Oracle’s LISTAGG output.

Why Configuration Matters:

If Column Blocks do not change the layout or auto-fill does not behave as expected, the most common cause is incorrect linkage between steps. When a child step is linked using a non-ID field (for example, a Name or text value), Apsona cannot recognize the relationship properly. As a result:

  • Column Blocks are ignored

  • Child records continue to appear vertically

  • Auto-fill from the previous step does not work

Once the linkage is corrected to use a Record ID or lookup relationship, all features function as intended.