menu_book Course Curriculum (PL/SQL) expand_more
Simple CASE
Learn Simple CASE in PL/SQL through a focused explanation, a dedicated construct-specific example, an engineering boundary, and a mastery check.
Simple CASE is an atomic PL/SQL topic inside Control Flow. This lesson focuses on how the Simple CASE construct is written, what it changes, and when it is the right tool.
Trace the example line by line. Identify the exact syntax for Simple CASE, the input state before it runs, and the resulting value, control flow, database state, hardware behavior, or runtime effect afterward. Neighboring lessons use different constructs rather than renamed copies of this one.
Topic-specific example
DECLARE v_grade CHAR:='B'; BEGIN CASE v_grade WHEN 'A' THEN DBMS_OUTPUT.PUT_LINE('excellent'); WHEN 'B' THEN DBMS_OUTPUT.PUT_LINE('good'); ELSE DBMS_OUTPUT.PUT_LINE('other'); END CASE; END; /For Simple CASE, test the boundary that belongs to this exact feature rather than a generic failure case. Check invalid or empty input, NULL/unknown state, numeric limits, transaction or exception behavior, synthesis/runtime constraints, ownership/permission rules, or backtracking/control-flow effects where they apply.