sample table schema for SQL Fiddle
CREATE TABLE Persons
(
PersonID int,
LastName varchar(255),
FirstName varchar(255),
Address varchar(255),
City varchar(255)
);
INSERT ALL
INTO Persons VALUES (1,'Rudnik','Rafal','Rydygiera','Warszawa')
INTO Persons VALUES (2,'abc','abc','Plantowa','Warszawa')
INTO Persons VALUES (3,'aaa','aaa','Przyokopowa','Warszawa')
SELECT 1 FROM dual;