definition of from - sqlrecall that the operand

Question

Definition of FROM - SQL

Recall that the operand of FROM is denoted by a commalist, each element of that commalist being a table expression optionally accompanied by a range variable name. Then we can write:

Syantax:

FROM fe₁ , fe₂ , ... fe_n (n ≠ 0) is equivalent to FROM fe₁ CROSS JOIN fe₂ CROSS JOIN ... CROSS JOIN fe_n.