You are right. Slide 47 says: > "With CTE and Windowing, SQL is Turing Complete." CTE (Common Table Expressions) were introduced in the SQL:1999 standard, win

You are right. Slide 47 says: > "With CTE and Windowing, SQL is Turing Complete." CTE (Common Table Expressions) were introduced in the SQL:1999 standard, window functions were introduced in the SQL:2003 standard. PostgreSQL implemented both CTEs and window functions in PostgreSQL 8.4.