Inner joins in sql

Question

hi 

i have one doubt please help me

create table Patient(

ID int not null primary key,

FirstName varchar(30),

LastName varchar(30),

DateOfBirth datetime

);

Create table Insurance(

ID int not null Primary key,

InsuranceName varchar(50),

);

Create table PatientInsurance(

PatientID int not null,

InsuranceID int not null,

Foreign Key(PatientID) References patient(ID),

Foreign Key(InsuranceID) References Insurance(ID)

);

there are three tables in my db and this is a table structure

iam insert a five record for each table ok

my question is : How to get a list of all patients having insurancename  and patient does not have any insurance 

how to prepare a script for this question please help me anyone