What is the difference between ";" and "GO" in T-SQL?

Solution 1:

GO is not actually a T-SQL command. The GO command was introduced by Microsoft tools as a way to separate batch statements such as the end of a stored procedure. GO is supported by the Microsoft SQL stack tools but is not formally part of other tools.

You cannot put a GO into a string of SQL and send it as part of a ADO.NET command object as SQL itself does not understand the term. Another way to demonstrate this is with the profiler: set up some statements that use GO in Query Analyzer/Management Studio and then run the profiler when you execute. You will see they are issued as separate commands to the server.

The semi-colon is used to signify the end of a statement itself, not necessarily a whole batch.

http://msdn.microsoft.com/en-us/library/ms188037.aspx

Solution 2:

"GO" is similar to ; in many cases, but does in fact signify the end of a batch.

Each batch is committed when the "GO" statement is called, so if you have:

SELECT * FROM table-that-does-not-exist;
SELECT * FROM good-table;

in your batch, then the good-table select will never get called because the first select will cause an error.

If you instead had:

SELECT * FROM table-that-does-not-exist
GO
SELECT * FROM good-table
GO

The first select statement still causes an error, but since the second statement is in its own batch, it will still execute.

GO has nothing to do with committing a transaction.

Solution 3:

semicolon is a statement separator. The previous statement(s) is not necessarily executed when a semicolon is encountered.

GO

Signifies the end of a batch. Executes the previous batch of statements, as does encountering the end of the block.

GO 2

Means execute the batch that many times. I think I've used that option maybe twice in my life. Then again, I'm not a DBA by trade.

Solution 4:

1. Under SQL Server TSQL (2005 - 2016) bear in mind that:

   • Semicolon (;) is a block terminator.
   • GO is a batch terminator.

2. Additionally, GO can be used to invoke the same DML block multiple times using the following syntax:

GO [count]

Where [count] is a positive integer that indicates how many times the TSQL block of commands preceding said GO are to be carried out over and over.

3. Also, unlike semicolon, GO is mandatory before a new DDL, say, when you create a new view, since a semicolon separating previous commands will trigger an error. For example:

drop view #temporary_view
GO
create view #another_view...
--> NO ERRORS

If you replaced GO with a semicolon in the previous example, it will raise the following error message:

'CREATE VIEW' must be the first statement in a query batch.

Solution 5:

'GO' is typically used to indicate the end of a batch of SQL statements which means that you could have a begin transaction and end transaction wrapped up into a single collection of statements that could fail or succeed together.

';' is generally used to separate multiple SQL statements from one another. This is noticable in SQL scripts that need to return multiple recordsets, such as `select * from table1; select * from table2;' which would result in two separate recordsets on the client's side.