Incorrect syntax near GO and why one cannot use GO when executing dynamic sql

When dynamic sql is executed using sp_executesql,

GO

keyword cannot be used because it will produce and error "Incorrect syntax near GO". Also that SQL Server will be looking for a carriage return CHAR(13) and a line feed CHAR(10)

Example:

-- declare some variables
DECLARE @SQL VARCHAR(100)
DECLARE @dbName VARCHAR(100)-- Get the current or target database name
SET @dbName = DB_NAME()-- Build the script
SET @sql = 'USE [' + @dbName + ']' + CHAR(13) + CHAR(10)
SET @sql = @sql + 'GO' + CHAR(13) + CHAR(10)-- Print the command
PRINT (@sql)

The code above will work for printing out the statement to the screen, but it will not execute if you add EXEC sp_executesql @sql

The solution would be to remove the

GO

keyword altogether. The code below will execute without an issue:

-- declare some variables
DECLARE @SQL VARCHAR(100)
DECLARE @dbName VARCHAR(100)-- Get the current or target database name
SET @dbName = DB_NAME()-- Build the script
SET @sql = 'USE [' + @dbName + ']' + CHAR(13) + CHAR(10)
SET @sql = @sql + CHAR(13) + CHAR(10)-- Print the command
PRINT (@sql)
EXEC sp_executesql @sql

The only way to get the dynamic sql to work with

GO

is to either copy the output to another window and run from there or write it to external file and then execute from your code using

exec master..xp_cmdshell 'osql -E -i C:\Scripts\test.sql'