{\rtf1\ansi\ansicpg1252\deff0\nouicompat\deflang1040{\fonttbl{\f0\fnil\fcharset0 Calibri;}} {\*\generator Riched20 10.0.22000}\viewkind4\uc1 \pard\sa200\sl276\slmult1\f0\fs22\lang16 create table provanull (a integer);\par insert into provanull values (1), (10), (20), (null);\par select * from provanull where a >= all (select a from provanull);\par select * from provanull where a >= all (select max(a) from provanull);\par }