select FIRST_NAME,LAST_NAME,SALARY
Case
When SALARY > 15000 then 'high'
When SALARY < 10000 then 'low'
ELSE 'super low'
END As salary_group
from hr.employees
On running the query, I get the follwoing:
ORA-00923: FROM keyword not found where expected
There's a syntax error in your query, you need a comma after SALARY column:
select FIRST_NAME,LAST_NAME,SALARY,
Case
When SALARY > 15000 then 'high'
When SALARY < 10000 then 'low'
ELSE 'super low'
END As salary_group
from hr.employees