What is SQL optimization in the context of AMC?

SQL optimization in AMC, as in any database system, focuses on improving query performance. This involves adjusting SQL query elements like JOIN conditions, WHERE clauses, and SELECT statements to minimize the resources (CPU, memory, I/O) and time required for the query to execute. This leads to faster data retrieval and more efficient use of AMC's analytical capabilities. The other options are incorrect because: optimizing a first-party schema is schema design, not SQL optimization; sampling tables is a data analysis technique, not a method for optimizing the query itself; and using custom parameters might affect query logic but doesn't inherently optimize the SQL execution plan.