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FIRST

This page describes the FIRST function in Lenses SQL.

FIRST(expr)

Returns the first item seen in a group.

Available in:

Processor (stateless)

Processors (stateful)

SQL Studio

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Sample code:

USE `kafka`;
SELECT FIRST(id) 
FROM orders-events

Output:

{
  "value": {
    "FIRST": "d4e60554-260d-4f14-873a-9c0352ad9387"
  }
}