Add useful SQL equivalents

[vitaliihonta]

Filtering:

• num.between(x: Num, y: Num) ???
• coalesce?
• limit
• offset
• like (https://www.postgresqltutorial.com/postgresql-tutorial/postgresql-like/)

Ordering:

• nullsFirst, nullsLast

Set operators:

• intersect
• except?

Aggregation:

• Agg without groupBy (SELECT max(temp_lo) FROM weather;)
• Think about having
• And more from https://www.postgresql.org/docs/current/functions-aggregate.html

Window functions:

• https://www.postgresql.org/docs/current/functions-window.html

Sub query expressions

• https://www.postgresql.org/docs/current/functions-subquery.html