To comment out or uncomment SQL code in the SQL and XQuery editor:
- Select the SQL code that you want to comment out or uncomment. For a single line, click anywhere in the line of code. For multiple lines, drag the pointer through the lines of code.
- Right-click the selected SQL code, and then select Toggle Comment.
- Select the SQL code that you want to comment out or uncomment. For a single line, click anywhere in the line of code. For multiple lines, drag the pointer through the lines of code.
- Right-click the selected SQL code, and then select Toggle Comment.
How do you make comments in SQL?
Single Line SQL Comment
- Simple Example. If you run this code, the line of “–Show all data” is not run. ...
- Comment Out Column in SELECT Clause. When this query is run, the first_name column is not shown in the output. ...
- Comment Out Column with Leading Commas. ...
- SQL Comments in WHERE Clause. ...
- SQL Comments in WHERE Clause and 1=1. ...
- Comment at End of Line. ...
- MySQL Comment Alternative. ...
How to get table comments via SQL in Oracle?
The object about which you are adding a comment must be in your own schema or:
- To add a comment to a table, view, or materialized view, you must have COMMENT ANY TABLE system privilege.
- To add a comment to an indextype, you must have the CREATE ANY INDEXTYPE system privilege.
- To add a comment to an operator, you must have the CREATE ANY OPERATOR system privilege.
How to resolve the SQL error?
Common SQL syntax errors and how to resolve them
- SQL Keyword errors. SQL keyword errors occur when one of the words that the SQL query language reserves for its commands...
- Arrangement of commands. As the error message states, CREATE SCHEMA command has to be the first command that is given. .
- Using quotation marks. Another common error that occurs when writing SQL...
How to comment multiple lines in SQL?
To comment or uncomment multiple lines in the web interface > SQL Worksheet:
- Highlight multiple lines in the Worksheet. Begin ; Copy into tbscore from @~/ FILE_FORMAT = (TYPE=CSV) ON_ERROR='continue' pattern='.*.gz' ;
- Press CMD + / (Mac) or CTRL + / (Windows). The highlighted lines are commented out. ...
- Press CMD + / (Mac) or CTRL + / (Windows) again. The comments are removed from the highlighted lines.
How do I comment in a SQL file?
You can include a comment in a statement in two ways:Begin the comment with a slash and an asterisk (/*). Proceed with the text of the comment. This text can span multiple lines. ... Begin the comment with -- (two hyphens). Proceed with the text of the comment. This text cannot extend to a new line.
How do I comment out an entire section in SQL?
Ctrl + Shift + Slash can be used to comment/uncomment blocks of queries.
How do you comment multiple lines in MS SQL?
Comments can be inserted on a separate line or within a Transact-SQL statement. Multiple-line comments must be indicated by /* and */. A stylistic convention often used for multiple-line comments is to begin the first line with /*, subsequent lines with **, and end with */. There is no maximum length for comments.
Can SQL have comments?
In SQL, you can comment your code just like any other language. Comments can appear on a single line or span across multiple lines.
What is the shortcut to comment out in SQL?
The keyboard shortcut to comment text is CTRL + K, CTRL + C. The keyboard shortcut to uncomment text is CTRL + K, CTRL + U.
What does /* mean in SQL?
a multiline comment/* means a start of a multiline comment. For example: /* CREATE PROC A_SAMPLE_PROC BEGIN AS SELECT * FROM A_SAMPLE_TABLE END */ while -- means single line comment. Keyboard shortcut for commenting in MS SQL Server Studio is Ctrl + K, Ctrl + C.
How do I write a comment in MySQL?
MySQL Server supports three comment styles: From a # character to the end of the line. From a -- sequence to the end of the line. In MySQL, the -- (double-dash) comment style requires the second dash to be followed by at least one whitespace or control character (such as a space, tab, newline, and so on).
How a single and multiple line comment is given in 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.
What are the SQL commands?
Some of The Most Important SQL CommandsSELECT - extracts data from a database.UPDATE - updates data in a database.DELETE - deletes data from a database.INSERT INTO - inserts new data into a database.CREATE DATABASE - creates a new database.ALTER DATABASE - modifies a database.CREATE TABLE - creates a new table.More items...
How do I comment out a block in SQL Developer?
In SQL Developer you can comment a line or a block using "Source -> Toggle Line Comments" (Ctrl-Slash), but it would be nice to have a button that allows you to do it not only for line or block, but also for a part of a line.
Which of the following is used to comment out multi lines?
To comment out multiple lines in Python, you can prepend each line with a hash ( # ).
Which of the following comments is used for single line comment in TSQL?
Single-Line Comments The single line SQL comment uses two dashes (–) in SQL Server. Once you add the two dashes, SQL Server ignores the text written after these dashes in a single line.
Can you comment 2 or more rows in SQL query if yes how can you do it?
If we need to comment out multiple lines, you need to put a double dash on each line. It is not a feasible solution if we want to comment out multiple lines of code. Therefore, SQL Server uses multi-line comments that start with /* and ends with */. SQL Server ignores the texts, code written inside these.
What is the shortcut for comment in Oracle SQL Developer?
In Sql Developer,You can use the following commands...For Commenting Sql Statements... ctl and / keys.For un-commenting Sql Statements... ctl and / keys again.Additionally, to format sql statement ctl and F7.
What are the SQL commands?
Some of The Most Important SQL CommandsSELECT - extracts data from a database.UPDATE - updates data in a database.DELETE - deletes data from a database.INSERT INTO - inserts new data into a database.CREATE DATABASE - creates a new database.ALTER DATABASE - modifies a database.CREATE TABLE - creates a new table.More items...
What are the DML commands?
Following are the four main DML commands in SQL:SELECT Command.INSERT Command.UPDATE Command.DELETE Command.
How to write a comment in SQL?
You can write single-line comments in SQL using --. After the --, you can write any comment you'd like as long as it's in one 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:
How many rules are there in SQL?
24 Rules to the SQL Formatting Standard
Can you comment out a word in a code?
For example, you can comment out a single word from the code, like the ASkeyword:
What comment to use to ignore part of a SQL statement?
In SQL if we want to ignore just a part of a statement, we can use the /* */ comment.
Can SQL comments be used in Microsoft Access?
SQL Comments are not supported in Microsoft Access databases and thus we use Firefox and Microsoft Edge.
How to comment out SQL code?
While you are writing SQL statements in the SQL and XQuery editor, you can quickly comment out SQL code by using a command on the pop-up menu. You can use the same command to quickly uncomment SQL code.
What happens if all lines are comments?
If all of the lines were comments, all of the lines are now active
Where does a comment start 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.
What is the comment symbol in MySQL?
In MySQL, a comment started with -- symbol is similar to a comment starting with # symbol. When using the -- symbol, the comment 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.
How many syntaxes are there for commenting in MySQL?
There are three syntaxes that you can use to create a comment within your SQL statement in MySQL.
Can you create a comment in MySQL?
In MySQL, you can create a SQL comment that spans multiple lines in your SQL statement. For example:
What is a Comment?
To understand what exactly this means and why we’re referring to “uncommenting” or “commenting out” lines rather than “enabling” or “disabling” them, it’s important to understand the structure of a configuration file. In addition to actual configuration directives, these files can contain comments. These comments aren’t for the computer – they exist to explain the format of the configuration file to anyone reading it. The # before each line tells the computer that this is a comment line – the computer should ignore it, skip over it, and try to interpret the next line that doesn’t begin with a #.
How to uncomment a line in a configuration file?
The Short Answer. You can “uncomment a line” in a configuration file by removing the # at the start of the line. Or, to “comment out” a line, add a # character to the start of the line. (Note that some languages have different comment formats, so this may not be true if you’re working with a source code file.) ...
What is the # in a configuration file?
In some cases, a configuration file may include a configuration option that’s disabled by default. To disable the configuration instruction, a # is included before its line as well, instructing the computer to ignore the line.
Why use SQL comments?
An additional major advantage to SQL comments would be the supporting information that comments may provide greatly help with verification. There may also be cases in which others would find it helpful to be able to understand why you had used specific code. For instance, if a database administrator is updating some of the code used for a database and they look at sections that had been written by someone else, then it may be much easier for the administrator to clearly see why some sections had included some of the names, tables, statements, clauses, etc. that had been used. Perhaps you want to take a vacation at some point and someone else will be helping with modifications of a database or you will be sending your work to someone else who will then need to know the basis of your reasoning.
Why add comments to SQL code?
Adding comments to your SQL code is considered best practice for many reasons. Ideal code includes characteristics such as a good level of readability. Readability of code involves the level of ability to read and clearly understand code that has been written. As with the concept of an author including descriptions of event, places, ...
What is a multiline comment?
In this example, you will be able to see a Multiline comment used. As indicated in the name, Multiline comments include more than one line of comments. Notation in the form of the combination of forward slash with asterisk and then asterisk with forward slash is respectively used to signal for the beginning and then ending of a block of comments. The following is a basic example of a Multiline comment:
How many dashes are in a comment line?
A comment line is notated with two dashes. For example, the following is an example of how a line comment should look:
Objective – SQL Comment
What Are The Comments in Sql?
- SQL Comments are not supported in Microsoft Access databases and thus we use Firefox and Microsoft Edge. SQL Comment Syntax The two types of syntax in SQL comment– Have a look at SQL Sequence 1. SQL Comment Syntax Using — symbol In a line break after it. This method of commenting must be at the end of the line and be in a single line. 1. SQL Commen...
SQL Comment Indicators
- SQL Comment Indicator is indicated in following examples, including the double hyphen ( — ), braces ( { } ), and C-style ( /* . . . */ ) comment delimiters to include a comment after an SQL statement. 1. In the following examples, we will place the comment on a separate line – Examples of multi-line statements – Let’s discuss SQL Operators So, this was all in SQL Comment. Hope y…
Conclusion – SQL Comment
- Hence, in this SQL Comment tutorial, we discussed different comments in SQL. We saw SQL Single line and Multi-Line Comment. Also, we discussed comment indicators in SQL. Is this explanation helps to you, tell us through comments. See also – SQL Cursor For reference