# Overview
The SQL **`EXCEPT` operator** joins two `SELECT` statements and retrieves rows from the first `SELECT` statement not obtained by the second `SELECT` statement. This indicates that `EXCEPT` only returns entries that aren't accessible in the second `SELECT` query.
## Syntax
```SQL
SELECT <Attributes> FROM <Table1>
EXCEPT
SELECT <Attributes> FROM <Table2>
```
The following illustration helps us to grab this concept more firmly. Let's look into it.

use msdb;
-- Create Student table
CREATE TABLE dbo.Students
(
    ID int,
    Name varchar(15),
    Age int
);
-- Insert values
INSERT INTO dbo.Students VALUES(1, "Hamid", 21);
INSERT INTO dbo.Students VALUES(2, "Haris", 24);
INSERT INTO dbo.Students VALUES(3, "Ali", 22);
INSERT INTO dbo.Students VALUES(4, "Jawad", 21);
INSERT INTO dbo.Students VALUES(5, "Khan", 25);
INSERT INTO dbo.Students VALUES(6, "Moiz", 20);
-- Display Students table
SELECT * FROM msdb.dbo.Students 

-- Create Cricker_Team table
CREATE TABLE dbo.Cricket_Team
(
    Player varchar(15),
    Role varchar(15)
);
-- Insert values
INSERT INTO dbo.Cricket_Team VALUES("Hamid", "Batsman");
INSERT INTO dbo.Cricket_Team VALUES("Haris", "Keeper");
INSERT INTO dbo.Cricket_Team VALUES("Moiz", "Batsman");
-- Dislay Cricker_Team table
SELECT * FROM msdb.dbo.Cricket_Team 

-- Using except statement
SELECT Name FROM dbo.Students
Except
SELECT Player FROM dbo.Cricket_Team;

-- Dropping tables
drop table msdb.dbo.Students;
drop table msdb.dbo.Cricket_Team;



import React from 'react';
import { shallow, configure } from 'enzyme';
import Adapter from 'enzyme-adapter-react-16';

configure({ adapter: new Adapter() });

import HelloWorld from './app';

var TestResult = function() {
    this.succeeded = false;
    this.reason = "";
    this.input = "";
    this.expected_output = "";
    this.actual_output = "";
}

export const executeTests = function() {

  var results = [];

  result = new TestResult();
  result.input = 'HelloWorld Component';
  result.expected_output = "span containing text 'Hello World'"

  let wrapper = shallow(<HelloWorld />);

  // Call your Challenge function here.

  let type = wrapper.type();
  let testSuccessful = true;
  let failureReason;

  if (type !== 'span') {
    testSuccessful = false;
    failureReason = "You need to render exactly one span HTML element";
  } else if (wrapper.props().children != "Hello World") {
     testSuccessful = false;
     failureReason = "You have rendered wrong message in your span element";
  }

  result.actual_output = wrapper.html();

  if (testSuccessful) {
    result.succeeded = true;
    result.reason = "Succeeded"
  } else {
    result.succeeded = false;
    result.reason = failureReason;
  }

  results.push(result);

  return results;
}


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What is the "EXCEPT" operator in SQL?

EXCEPT in SQL retrieves unique rows from the first SELECT query not present in the second SELECT query.

What is the "EXCEPT" operator in SQL?

Overview

Syntax

Code

Explanation