ORA-00933: SQL Command not properly ended - (Error at Line 2) - sql

Question

I'm not sure where the error is,
(Error at Line 2)
(Help)
select last_name, first_name
from employee group by Employee_ID in
select Employee_ID from service group by Property_ID having count(*)>2;
employee table
create table EMPLOYEE(
Employee_ID int primary key,
Last_name char(30),
First_Name char(30),
CellPhone char(20),
ExperienceLevel char(30),
CONSTRAINT EX_EMPLOYEE_EXPERIENCELEVEL CHECK (ExperienceLevel IN('Master', 'Junior', 'Senior'))
);
service Table
create table SERVICE (
Property_ID int,
Employee_ID int,
Service_Date date,
Hours_worked int,
primary key(Property_ID, Employee_ID),
foreign key(Property_ID) references PROPERTY(Property_ID),
foreign key(Employee_ID) references EMPLOYEE(Employee_ID)
);
property table
create table PROPERTY(
Property_ID int primary key,
Owner_ID int,
Owner_Name char(30),
Owner_email char(30),
Owner_type char(30),
CONSTRAINT EX_PROPERTY_OWNERTYPE CHECK (Owner_type IN('Individual', 'Corporate', 'Partnership'))
);

Answer 1

Your query is not very clear. The in clause before the subquery is not a valid clause at that position. If you want to select the employes whose id are in the subquery, so you have to do something like this:
select last_name, first_name
from employee
WHERE Employee_ID in
(select Employee_ID from service
group by Property_ID having count(*)>2);