Database query
Database query (DB Query) retrieves data from an external database and adds it to the records in your stream. You can query data from multiple tables in a single request. Query results are stored in the queryResult parameter and appended to the payload, which is then passed to the next function in the stream. Each record receives its own independent copy of queryResult, so a downstream function (for example, Script ) can read and modify it without affecting other records or any cached result.
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This section has the following subsections: