Oracle PL/SQL: CASE Expression vs. CASE Statement

Oracle PL/SQL distinguishes between CASE Expressions, which return scalar values, and CASE Statements, which execute procedural actions. Regarding table functions, Pipelined Table Functions offer lower memory allocation and faster Time to First Row compared to Regular Table Functions by streaming rows iteratively. Additionally, Oracle SQL provides JSON functions like JSON_OBJECT for creating key-value pairs and JSON_OBJECTAGG for aggregating multiple rows into a single JSON document, enabling efficient transformation of relational data into standard JSON formats.