menu_book Course Curriculum (PostgreSQL Complete Course) expand_more
ENUM type
Learn ENUM type in PostgreSQL through the exact construct, a dedicated example, a boundary case, and a mastery check.
ENUM type is an atomic PostgreSQL lesson inside Data Types. The example uses the specific syntax, command, API, instruction, or language rule named by this lesson.
Study the construct itself, then change one relevant input and predict the result before running it. That keeps this lesson focused on ENUM type rather than on generic PostgreSQL syntax.
Topic-specific example
CREATE TYPE order_status AS ENUM ('pending','paid','shipped');
Test ENUM type with an empty result, NULL/missing value, duplicate key, or concurrent operation where relevant; database behavior should be verified at the boundary shown by this example.