SQL SELECT without FROM should read VALUES without INSERT

SQL SELECT without FROM should read VALUES without INSERT

Let’s get that straight from the beginning: select without from is not standard conforming SQL. F...概要を表示 Let’s get that straight from the beginning: select without from is not standard conforming SQL. Full stop. Nevertheless it works in many databases—also in standard conforming ones. That’s no contradiction: the standard explicitly allows conforming databases to “provide user options to process non-conforming SQL statements”.0 The behavior of such statements is completely up to the vendor, of course