I have multiple custom SQL data sources in Looker Studio, each querying BigQuery, and they all rely on the same parameter (e.g., client_key) for filtering.
I’m trying to ensure that this parameter can be controlled centrally—ideally passed via URL—and mapped to each data source so the queries execute correctly on page load, without requiring extra user interaction.
What’s the best way to map the same parameter across these SQL-based data sources and bind it to a single URL parameter effectively?
Appreciate any insights or proven strategies!