How can you comment multiple lines in MySQL?
Syntax Using /* and */ symbols In MySQL, a comment that starts with /* symbol and ends with */ and can be anywhere in your SQL statement. This method of commenting can span several lines within your SQL.
How do I create a multiline comment in SQL?
Comments
- Begin the comment with a slash and an asterisk (/*). Proceed with the text of the comment. This text can span multiple lines. End the comment with an asterisk and a slash (*/).
- Begin the comment with — (two hyphens). Proceed with the text of the comment. This text cannot extend to a new line.
What is SQL code for a multi line comment?
Multi-line comments start with /* and end with */ . Any text between /* and */ will be ignored.
How do I comment out a line in MySQL workbench?
It’s not nearly as convenient, but it works for me with Windows 7 and MYSQL Workbench 6.1. Instead you can also simple type “#” at the Point of line you want to comment.
How do I comment multiple lines in MySQL workbench?
MySQL supports three comment styles:
- From a ‘– ‘ to the end of the line. The double dash-comment style requires at least whitespace or control character (space, tab, newline, etc) after the second dash.
- From a ‘#’ to the end of the line.
- C-style comment /**/ can span multiple lines.
What is group by in MySQL?
The MYSQL GROUP BY Clause is used to collect data from multiple records and group the result by one or more column. It is generally used in a SELECT statement. You can also use some aggregate functions like COUNT, SUM, MIN, MAX, AVG etc. on the grouped column.
How do I comment multiple lines in SQL Management Studio?
To comment out lines of code in SQL Server Management Studio (SSMS) Query Window, select lines of code you want to comment out and hit the keyboard shortcut ‘CTRL+K’ followed by ‘CTRL+C’.
Will SQL query work if there are no indexes on the relations?
Explanation: The SQL query will work even when there are no indexes on the relations. It is because SQL query could generate index automatically even when there is no indication of indexes. In this context, the index is commonly used for speeding up the presentation of queries in SQL.
How do I comment and uncomment in MySQL workbench?
Modifier in the tables stands for the platform-specific modifier key. This is Command on macOS, Control on other platforms. On macOS, the Alt key is Option….Table B.2 Edit menu keyboard shortcuts.
| Function | Keyboard Shortcut | Context |
|---|---|---|
| Comment/Uncomment lines of SQL | Modifier+/ | SQL Editor |
What is comment in MySQL workbench?
A comment is a programmer-readable explanation or annotation placed in the SQL queries. It is used for the purpose of making the SQL statements easier for humans to understand. MySQL generally ignores them during the parsing of the SQL code. Comments can be written in a single line or multiple lines.
How to use multi line comment in SQL?
SQL Multi-line Comment Multi-line SQL Comments start with /* and end with */ and anything between them would be ignored. In SQL if we want to ignore just a part of a statement, we can use the /* */ comment. 3. SQL Comment Indicators
How to create a comment in MySQL that spans multiple lines?
In MySQL, you can also create a SQL comment that spans multiple lines using this syntax: SELECT contact_id, last_name, first_name /* Author: TechOnTheNet.com Purpose: To show a comment that spans multiple lines in your SQL statement.
What are the different types of comments in MySQL?
1 MySQL Comments. Comments are used to explain sections of SQL statements, or to prevent execution of SQL statements. 2 Single Line Comments. Single line comments start with –. Any text between — and the end of the line will be ignored (will not be executed). 3 Multi-line Comments. Multi-line comments start with /* and end with */.
Where do comments start and end in MySQL?
In MySQL, a comment that starts with /* symbol and ends with */ and can be anywhere in your SQL statement. This method of commenting can span several lines within your SQL.
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