MSSQL - Fix Error - Invalid column name

Msg 207, Level 16, State 1, Line 8
Invalid column name 'frank'.
Msg 207, Level 16, State 1, Line 8
Invalid column name 'sinatra'.


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To fix it replace
INSERT INTO [dbo].[Customers]
           ([FisrtName]
           ,[LastName])
     VALUES
           ("frank", "sinatra")
GO

with
INSERT INTO [dbo].[Customers]
           ([FisrtName]
           ,[LastName])
     VALUES
           ('frank', 'sinatra')
GO