There are two types of SQL comments: simple comments. Simple comments are introduced by two consecutive hyphens (–) and end with the end of line. bracketed comments.
What is the comment tag in SQL?
A comment can appear between any keywords, parameters, or punctuation marks in a statement. 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.
What is the comment tag in SQL?
A comment can appear between any keywords, parameters, or punctuation marks in a statement. 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.
What are the 3 types of SQL commands?
There are 3 main types of commands. DDL (Data Definition Language) commands, DML (Data Manipulation Language) commands, and DCL (Data Control Language) commands.
What are types of comment?
Generally, two types of comments exist: single-line comments. multi-line comments.
Can SQL have comments?
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 statements. The syntax for a comment in a line of SQL code is a double hyphen ( — ) at the beginning of the line.
What is comment and example?
Synonyms: remark on, explain, talk about, discuss More Synonyms of comment. 2. variable noun. A comment is something that you say which expresses your opinion of something or which gives an explanation of it. He made his comments at a news conference in Amsterdam.
What is a tag comment?
HTML Tag The comment tag is used to insert comments in the source code. Comments are not displayed in the browsers. You can use comments to explain your code, which can help you when you edit the source code at a later date.
How many SQL statements are there?
In Data Manipulation Language(DML), we have four different SQL statements, Select, Insert, Update, and Delete.
What are types of statements?
declarative sentence (statement) interrogative sentence (question) imperative sentence (command) exclamative sentence (exclamation)
What are the 4 parts of SQL?
The scope of SQL includes data query, data manipulation (insert, update, and delete), data definition (schema creation and modification), and data access control.
What is the comment tag in SQL?
A comment can appear between any keywords, parameters, or punctuation marks in a statement. 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.
What are the 3 components of SQL?
SQL has three main components: the Data Manipulation Language (DML), the Data Definition Language (DDL), and the Data Control Language (DCL).
How many SQL commands are there?
There are five types of SQL commands: DDL, DML, DCL, TCL, and DQL.
What are the 4 parts of SQL?
The scope of SQL includes data query, data manipulation (insert, update, and delete), data definition (schema creation and modification), and data access control.
What are basic comments?
As you read the code examples, you often encounter the comment symbol ( ‘ ). This symbol tells the Visual Basic compiler to ignore the text following it, or the comment. Comments are brief explanatory notes added to code for the benefit of those reading it.
How many types of comment statements are there?
There are mainly two types of comments as follows: Line comment. Block comment.
What is the difference between comments and /* style comments?
There are two types of comments: single and multi-line. C-style comments or multi-line comments are used to comment on large blocks of text or code. C++ style comments or single-line comments are used to comment on single lines of text or code.
What type of comment is this /* this is a comment */?
Types of Comments There are two ways to add comments in C: // – Single Line Comment. /*… */ – Multi-line Comment.
Which command is used for comment?
Use /* and */ to set off a comment within a command. The comment can be placed wherever a blank is valid (except within strings) and should be preceded by a blank. Comments within a command cannot be continued onto the next line. The closing */ is optional when the comment is at the end of the line.
Are there comments 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).
What are comments explain 3 types of comments available in Java?
Comments in Java are used to provide some extra information about the code. Single line, multi-line and documentation are the three ways to present the comments in Java.
