MySQL ユーザー変数にはどのようなプロパティがありますか?

mysql> SET @A = 'MySQL';
Query OK, 0 rows affected (0.00 sec)

mysql> Select @A, @a;
+-------+-------+
| @A    | @a    |
+-------+-------+
| MySQL | MySQL |
+-------+-------+
1 row in set (0.00 sec)

mysql> Set @table_name = CONCAT('tbl_','Employee');
Query OK, 0 rows affected (0.00 sec)

mysql> Create Table @table_name(Id Int);
ERROR 1064 (42000): You have an error in your SQL syntax near '@table_name(Id Int)'

mysql> SET @name = 'Rahul';
Query OK, 0 rows affected (0.00 sec)

mysql> Select @name;
+-------+
| @name |
+-------+
| Rahul |
+-------+
1 row in set (0.00 sec)