![]() Choose all columns and all rows from the Address table. Click on the Go button in the next step to confirm and finally execute the task. Choose the AdventureWorks2022 database. The following example uses the - commenting characters. In MySQL, there are three ways to include comments: comment: The symbol can be used to start a single-line comment. Comments in MySQL are used to explain sections of SQL statements, or to prevent execution of SQL commands. Actionįor more information about keyboard shortcuts, see SQL Server Management Studio Keyboard Shortcuts.įor multiline comments, see Slash Star (Block Comment) (Transact-SQL). MySQL Comments: Single-line And Multi-line Comments. The following table lists the keyboard shortcuts that you can use to comment or uncomment text. 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. 23 You should place your comments inside the procedure body, i.e., whats between BEGIN and END. 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. A comment is a programmer-readable explanation or annotation placed in the SQL queries. The text from symbol to end of line is counted as a comment. Just write /* at the beginning of the comment, and */ at the end.To view Transact-SQL syntax for SQL Server 2014 and earlier, see Previous versions documentation. Similarly, you can also use hash ‘’ operator to specify comment. Inline comments useful to explain variables or conditions or a small piece of SQL code with in the query. The syntax / / also can be used to add inline comments and also can be use to write single line comments. The comment can be multiline, and you can decide where it ends. To write block of comments in multiple lines in MySQL you can use syntax / /. With /*.*/, you can comment out any part of the code you'd like. * product names along with the number of items ![]() Everything in between these two symbols is a comment. ![]() Example: Multi-line comment: To add a multi-line comment, begin with / and end with /. The comment will remain till the line is finished. ![]() As you might imagine, to compliment the mysqldump command used for exporting. If you want to do this, take a look at Solution 2. Here's how to add comments in MySQL: Single-line comment: To add a single-line comment, begin the line with two hyphens ( -) followed by your comment. The best tool for exporting a MySQL database to a text file is mysqldump. The first is the single-line comments and the second is multi-line comments. Note that when you use -, you comment out the code to the end of the line, so you can’t use - to comment out, for example, only the AS keyword. There are two types of comments available in MySQL. For example, you can comment out AS count_items but leave the COUNT(*) in. You can also use - to comment out a whole line of code or a part of a line from some place in the middle of the line to the end of the line. If you'd like to write a comment spanning multiple lines, you can use - at the beginning of each comment line, just as in the example: On Windows, click Start, All Programs, MySQL, MySQL 5.7 Command Line Client (or MySQL 8.0 Command Line Client, respectively). After the -, you can write any comment you'd like as long as it's in one line. You can write single-line comments in SQL using. products ordered by name in descending order product names along with the number of items For example, if you comment out line 4 in an SQL statement, and then later comment out the complete SQL statement, line 4 will then have double comment notation (that is, two sets of double hyphens in positions 1. Note: This process does not try to merge a new comment with an existing comment. You'd like to make some comments in your SQL code. The comment affects all of the SQL code in the line.
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