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select name||'''s ID : '||id||', WEIGHT is '|| weight||'Kg' "ID AND WEIGHT" from student;

select name||'('||hobby||')'||', '||name||''''||hobby||'''' from "NAME AND JOB"emp2;

select name||'''s PAY is $'||pay from "Name and Pay" emp2;

select name,empno from emp2 where name='Tom Cruise';

select name,empno from emp2 where empno='19900101';

select name , pay, pay-1000 from emp2;

select name , birthday from emp2 where birthday <= '94/01/01' ;