CREATE TABLE EMPLOYEE (FirstName VARCHAR2, LastName VARCHAR2, EmployeeId VARCHAR2)
CREATE TABLE CUSTOMER (SupportRepId VARCHAR2, FirstName VARCHAR2)

What is the first name and last name employee helps the customer with first name Leonie?
SELECT T2.FirstName, T2.LastName FROM CUSTOMER AS T1 JOIN EMPLOYEE AS T2 ON T1.SupportRepId = T2.EmployeeId WHERE T1.FirstName = "Leonie"
SELECT "T2"."FirstName", "T2"."LastName" FROM "CUSTOMER" "T1" JOIN "EMPLOYEE" "T2" ON "T1"."SupportRepId" = "T2"."EmployeeId" WHERE "Leonie" = "T1"."FirstName"