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?
- 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?
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.
How do I comment in MySQL workbench?
Start up MySQL Workbench and try out your fully working shortcut! Don’t forget you can also manually do this by going to the menu Edit -> Format -> Un/Comment Selection . You can also use the division symbol (forward slash) near the full size keypad if you have one.
How do I comment out a single line in SQL?
In SQL Server, a comment started with — symbol must be at the end of a line in your SQL statement with a line break after it. This method of commenting can only span a single line within your SQL and must be at the end of the line.
What is single line and multiple line function SQL?
PL/SQL supports two comment styles: single-line and multi-line. Single-line comments begin with a double hyphen ( – – ) anywhere on a line and extend to the end of the line. Multi-line comments begin with a slash-asterisk ( /* ), end with an asterisk-slash ( */ ), and can span multiple lines.
Is a single row SQL function?
Single row function in SQL are the ones who work on a single row and return one output per row. Single row function in SQL can be character, numeric, date, and conversion functions. these functions are used to modify data items.
How do I add a comment in mssql?
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.
What is the shortcut for comment in SQL Server?
The keyboard shortcut to comment text is CTRL + K, CTRL + C. The keyboard shortcut to uncomment text is CTRL + K, CTRL + U.
What is a comment in MySQL?
Comments are used to explain sections of SQL statements, or to prevent execution of SQL statements.
How should we add a single line comment in our PHP code?
How should we add a single line comment in our PHP code? Explanation: /* */ can also be use to comment just a single line although it is used for paragraphs. // and # are used only for single line comment.
Which is the comment symbol in MySQL Mcq?
In MySQL Server, we can write the comments in mainly three ways that are given below: Using # symbol. Using – symbol. Using /* and */ symbol.
How do you comment in PopSQL?
To add a comment in PopSQL, highlight some text, right-click the text, and click Comment SQL . When you write a comment, the query author will get an email notification.
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.