![]() ![]() Choose all columns and all rows from the Address table. Choose the AdventureWorks2022 database. CREATE TABLE foo ( id int (11) NOT NULL AUTOINCREMENT, PRIMARY KEY (id) ) ENGINEInnoDB DEFAULT CHARSETutf8mb4 COMMENTsome really long stringnthat we want to span multiple linesninstead of being limited to a single line. It supports interactive and noninteractive use. The following example uses the - commenting characters. mysql is a simple SQL shell with input line editing capabilities. Actionįor more information about keyboard shortcuts, see SQL Server Management Studio Keyboard Shortcuts.įor multiline comments, see Slash Star (Block Comment) (Transact-SQL). The opening and terminating characters need not be separated from the text by a space or a line break. mysql> SELECT 1+1 This comment continues to the end of line mysql> SELECT 1+1 - This comment continues to the end of line mysql> SELECT 1 / this is an in. The following table lists the keyboard shortcuts that you can use to comment or uncomment text. End the comment with an asterisk and a slash (/). 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. Use two hyphens ( -) for single-line or nested comments. Is the character string that contains the text of the comment. Syntax: SELECT FROM / Customers / Let’s Suppose we have on a table with name orders and we are fetching customername. All rights reserved.To view Transact-SQL syntax for SQL Server 2014 and earlier, see Previous versions documentation. In-line comments are an extension of multi-line comments, comments can be stated in between the statements and are enclosed in between ‘/’ and ‘/’. This syntax allows a comment to extend over multiple lines not be on the same line. Unfortunately, you can't do any kind of concatenation in your comment construction (to split the actual DDL. This post looks at how to show the tables in a particular. | Field | Type | Null | Key | Default | Extra |įrom a # character to the end of the lineįrom a '-' sequence to the end of the line To go along with BillKarwin's answer: If you want to use multiple lines to create the comment, just do so: CREATE TABLE foo ( fooid int primary key autoincrement, fooname varchar (255) ) COMMENT 'this is a multi-line comment'. The MySQL Command Line client allows you to run sql queries from the a command line interface. When using the - symbol, the comment must be at the end of a line in your SQL statement with a line break after it. Mysql> CREATE /*!32302 TEMPORARY */ TABLE t (a INT) The syntax for creating a SQL comment in MySQL using - symbol is: - comment goes here In MySQL, a comment started with - symbol is similar to a comment starting with symbol. If you add a version number after the ! character, the syntax within the comment is executed only if the MySQL version is greater than or equal to the specified version number. Other SQL servers will ignore the extensions. To comment multiple lines, you need to use the next operator. Both double dash and hash symbols can be used for only single line comments. mysql> select from data this is a comment. Example: DELIMITER CREATE PROCEDURE procname () COMMENT 'this is my comment' BEGIN /here comes my voodoo/ END DELIMITER This way you also save the comment in the database, not just in your source code. You can comment out or uncomment a single line of code in an SQL statement, multiple adjacent lines of code, a complete SQL statement, or multiple adjacent SQL. The text from symbol to end of line is counted as a comment. MySQL Server parses and executes the code within the comment. Similarly, you can also use hash ‘’ operator to specify comment. *! MySQL-specific code */ : comments « Introduction « MySQL Tutorial
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