How do you make a comment in SQL query?
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.
How do you comment a table in SQL?
Use the COMMENT statement to add a comment about a table, view, materialized view, or column into the data dictionary. To drop a comment from the database, set it to the empty string ‘ ‘. See Also: “Comments” for more information on associating comments with SQL statements and schema objects.
What is SQLite write a short note on it?
SQLite is an open source database, available on every android database. It supports standard relations database features, like SQL syntax, transactions & SQL statements. SQLite is considerably, the lighter version of SQL database, where most of the SQL commands don’t run on SQLite database.
Can you have comments in SQL?
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.
How do you write a multi line comment in SQL?
Multi-line SQL Comments start with /* and end with */ and anything between them would be ignored.
How do I comment out in SQL Server?
Commenting and Uncommenting Code in SQL Server 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’.
How do I make a comment table?
“oracle create table comment” Code Answer
- COMMENT ON TABLE table_name IS ‘A table comment’;
- COMMENT ON COLUMN table_name. MY_COLUMN IS ‘A column comment’;
- SELECT * FROM ALL_TAB_COMMENTS WHERE TABLE_NAME = ‘TABLE_NAME’;
- SELECT * FROM ALL_COL_COMMENTS WHERE TABLE_NAME = ‘TABLE_NAME’;
What language is SQLite written in?
CSQLite / Programming language
SQLite is written in ANSI-C. The C programming language is used because it is the universal assembly language – it can run on just about any hardware and on just about any operating system. No matter what programming language is used for the application code, it can usually interface easily with a library written in C.
What is SQLite format?
A file with . sqlite extension is a lightweight SQL database file created with the SQLite software. It is a database in a file itself and implements a self-contained, full-featured, highly-reliable SQL database engine.
How do you comment a single line in SQL?
SQL Comment uses the 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 in SQL comments.
How do I comment in a stored procedure?
To create line comments you just use two dashes “–” in front of the code you want to comment. You can comment out one or multiple lines with this technique. In this example the entire line is commented out.
How do you comment on data?
Appropriate comments should add value to a publication. Comments may highlight the most interesting results of the data, describe facts not immediately visible when looking at data, explain the meaning or the context of the data, or give information on data quality and data problems.
What is comment on table?
Adds, revises, or removes a comment on a table. Each object can have one comment. Comments are stored in the system table COMMENTS .
How do you write a single line comment in SQL?
Single line comments start with — . Any text between — and the end of the line will be ignored (will not be executed).
How comment multiple lines in SQL Server?
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.
How to create a comment in SQLite using symbols?
The syntax for creating a SQL comment in SQLite using /* and */ symbols is: In SQLite, 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 many lines does a comment span in SQLite?
SQLite will assume that everything after the /* symbol is a comment until it reaches the */ symbol, even if it spans multiple lines within the SQL statement. So in this example, the SQL comment will span across 2 lines within the SQL statement.
Can a comment appear on a single line or span?
These comments can appear on a single line or span across multiple lines. Let’s look at how to do this. There are two syntaxes that you can use to create a comment within your SQL statement in SQLite. The syntax for creating a SQL comment in SQLite using — symbol is: