Oracle 18c

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create table station(city varchar(50), id int);
insert into station values('NYC', 1);
1 rows affected

insert into station values('Boston', 2);
1 rows affected

select city,id from station where id % 2 = 0;
ORA-00911: invalid character

select city,id from station where mod(id, 2) = 0;


CITY
ID


Boston
2