alasql/test/test022.js

AlaSQL.js - JavaScript SQL database library for relational and graph data manipulation with support of localStorage, IndexedDB, and Excel

if(typeof exports === 'object') {
	var assert = require("assert");
	var alasql = require('..');
};

describe('Test 22', function() {
	it('EXCEPT and INTERSECT', function(done){

	var db = new alasql.Database("db");
		db.exec('CREATE TABLE test (a int, b int)');
		db.exec('INSERT INTO test VALUES (1,1)');
		db.exec('INSERT INTO test VALUES (2,2)');
		db.exec('INSERT INTO test VALUES (3,3)');
		db.exec('INSERT INTO test VALUES (4,4)');
		db.exec('INSERT INTO test VALUES (5,5)');
		db.exec('INSERT INTO test VALUES (6,6)');
		
		var res = db.exec('SELECT COLUMN a FROM test WHERE a<5 INTERSECT SELECT a FROM test WHERE a>2');

		assert.deepEqual([ 3,4 ], res);

		var res = db.exec('SELECT COLUMN a FROM test WHERE a<5 EXCEPT SELECT a FROM test WHERE a>2');
		assert.deepEqual([ 1,2 ], res);

		done();
	});
});