What is Intersect Operator in SQL Server - SQL Server Tutorial / TSQL Tutorial

--drop table dbo.Customer_AS
--drop table dbo.Customer_NA
Createtable dbo.Customer_AS ( 
CustomerId Int ,
CustomerName VARCHAR(100),
StreetAddress VARCHAr(100),
City VARCHAR(100),
StateCHAR(2))
go

Createtable dbo.Customer_NA ( 
CustomerId Int ,
CustomerName VARCHAR(100),
StreetAddress VARCHAr(100),
City VARCHAR(100),
StateCHAR(2))
go


--Insert couple of Records in Sample Table
Insertinto dbo.Customer_AS
Select 1,'Aamir shahzad','Test Street Address','Charlotte','NC'
Unionall
Select 2,'M Raza','Test Street Address','Charlotte','NC'
unionall
Select 1,'Aamir shahzad','Test Street Address','Charlotte','NC'



Insertinto dbo.Customer_NA
Select 1,'Aamir shahzad','Test Street Address','Charlotte','NC'
Union
Select 3,'John Smith','Test Street Address','New York City','NY'



--This will return us only one distinct matching record
Select * from dbo.Customer_AS
Intersect
Select * from dbo.Customer_NA