Added joins on CompileUpdateQuery for issue #637

[brykneval]

Added joins on UPDATE query. Results as

UPDATE [Test1] 
SET [Test1].[Test1Id] = 1
, [Test1].[Test1Description] = 'Name2Value' 
FROM [Test1]\nLEFT JOIN [Test] ON [Test].[TestId] = [Test1].[Test1Id]

[ahmad-moussawi]

This is not compatible with MySql and maybe with Oracle too