| title | description | author | ms.author | ms.date | ms.service | ms.subservice | ms.topic | ms.custom | f1_keywords | helpviewer_keywords | dev_langs | monikerRange | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
-- (Comment) (Transact-SQL) |
-- (Comment) (Transact-SQL) |
rwestMSFT |
randolphwest |
07/25/2019 |
sql |
t-sql |
reference |
|
|
|
|
>=aps-pdw-2016 || =azuresqldb-current || =azure-sqldw-latest || >=sql-server-2016 || >=sql-server-linux-2017 || =azuresqldb-mi-current || =fabric |
[!INCLUDE sql-asdb-asdbmi-asa-pdw-fabricse-fabricdw-fabricsqldb]
Indicates user-provided text. Comments can be inserted on a separate line, nested at the end of a [!INCLUDEtsql] command line, or within a [!INCLUDEtsql] statement. The server does not evaluate the comment.
:::image type="icon" source="../../includes/media/topic-link-icon.svg" border="false"::: Transact-SQL syntax conventions
-- text_of_comment
text_of_comment
Is the character string that contains the text of the comment.
Use two hyphens (--) for single-line or nested comments. Comments inserted with -- are terminated by a new line, which is specified with a carriage return character (U+000A), line feed character (U+000D), or a combination of the two. There is no maximum length for comments. The following table lists the keyboard shortcuts that you can use to comment or uncomment text.
| Action | Standard |
|---|---|
| Make the selected text a comment | CTRL+K, CTRL+C |
| Uncomment the selected text | CTRL+K, CTRL+U |
For more information about keyboard shortcuts, see SQL Server Management Studio Keyboard Shortcuts.
For multiline comments, see Slash Star (Block Comment) (Transact-SQL).
The following example uses the -- commenting characters.
-- Choose the AdventureWorks2022 database.
USE AdventureWorks2022;
GO
-- Choose all columns and all rows from the Address table.
SELECT *
FROM Person.Address
ORDER BY PostalCode ASC; -- We do not have to specify ASC because
-- that is the default.
GO