How do I comment in SQL?
How do I comment in SQL?
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 do I comment out a single line in SQL?
This method of commenting must be at the end of the line and be in a single line. A comment in SQL that starts with /* symbol and ends with */ and can span several lines within your SQL.
What is the shortcut to comment out in SQL?
The keyboard shortcut to comment text is CTRL + K, CTRL + C.
How do I comment multiple lines in SQL?
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 SQL 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 are single line comments defined in PL S * q * L?
PL/SQL supports two comment styles: single-line and multi-line. A double hyphen ( – – ) anywhere on a line (except within a character literal) turns the rest of the line into a comment. Multi-line comments begin with a slash-asterisk ( /* ) and end with an asterisk-slash ( */ ). For more information, see “Comments”.
Which of the following is single line comment?
Single-line comments end at the first end-of-line following the // comment marker. You can place it at the top of the code statement or after the code statement. If it’s after a code statement, whatever text following it is regarded as the comment.
How do you highlight and comment in SQL?
To comment or uncomment multiple lines in the web interface > SQL Worksheet:
- Highlight multiple lines in the Worksheet. Begin ;
- 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 write an if statement in MySQL?
MySQL IF() Function
- Return “YES” if the condition is TRUE, or “NO” if the condition is FALSE:
- Return 5 if the condition is TRUE, or 10 if the condition is FALSE:
- Test whether two strings are the same and return “YES” if they are, or “NO” if not:
Which operator is used to match text?
The SQL Like is a logical operator that is used to determine whether a specific character string matches a specified pattern. It is commonly used in a Where clause to search for a specified pattern in a column. This operator can be useful in cases when we need to perform pattern matching instead of equal or not equal.
How do I make a comment 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 do you add a table in SQL?
Open Microsoft SQL Server Management Studio (SSMS) and connect to the server where you’d like to add a new table. Expand the Tables Folder for the Appropriate Database. Once you’ve connected to the right SQL Server, expand the Databases folder and select the database where you’d like to add a new table.
How to create a composite key in SQL?
How to create a composite primary key with Microsoft SQL GUI: Open Microsoft SQL Server Management Studio. Right-clickon table and select Design. Create the first primary key – right-click on the column and select Set Primary Key item. Right-click again and select Indexes/Keys Under (General) section, click on Columns line and click button with three dots
How do I create a SQL statement?
How to Create a SQL Statement 1. Start your query with the select statement. 2. Add field names you want to display. 3. Add your statement clause(s) or selection criteria. 4. Review your select statement.
Where statement in SQL query?
WHERE is an SQL reserved word. The WHERE clause is used in conjunction with SQL DML statements, and takes the following general form: SQL-DML-Statement FROM table_name WHERE predicate. all rows for which the predicate in the WHERE clause is True are affected (or returned) by the SQL DML statement or query.
How do I comment in SQL? 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…