Table or column name cannot start with numeric?

Question

I tried to create table named 15909434_user with syntax like below:

CREATE TABLE 15909434_user ( ... )

It would produced error o

Answer 1

I'd imagine it's to do with the grammar.

SELECT 24*DAY_NUMBER as X from MY_TABLE

is fine, but ambiguous if 24 was allowed as a column name.

Adding quotes means you're explicitly referring to an identifier not a constant. So in order to use it, you'd always have to escape it anyway.