What does the symbol mean? in TSQL?

Question

SQL

The tutorials contain examples with CTE , in which the expression begins with ;WITH ...... The
question is, why a semicolon at the beginning?
I even work with her.

Answer 1

Apparently like the ending of the previous command.
If there are no commands before, the command is empty.

Answer 2

And in which tutorials exactly? MSDN doesn't do that: https://msdn.microsoft.com/en-us/library/ms175972.aspx

Answer 3

A semicolon ends a statement in SQL. As a rule, it is not needed and is not used. But CTE will not work without it if there are previous commands.
PS Quoting from a previous link where "MSDN doesn't do that": "If a common table expression is used in a statement that is part of a package, then the statement preceding it must be followed by a semicolon."