Page 269 - PYTHON-12

POINTS TO REMEMBER
• If the alias_name contains spaces, you must enclose it in quotes.
• It is acceptable to use spaces when you are aliasing a column name. However, it is not generally a good
practice to use spaces when you are aliasing a table name.
• The alias_name is only valid within the scope of the SQL statement.

 Alias name can be given to a mathematical expression also:

For example,
SELECT 22/7 as PI; Output: +------------+
| PI |

+------------+
| 3.1429 |

+------------+

12.16 PUTTING TEXT IN THE QUERY OUTPUT

In order to get an organized output from a SELECT query, we can include some user-defined
columns at runtime. These columns are displayed with a valid text, symbols and comments in the
output only. These included columns will appear as column heads along with the contents for that
column.

This makes the query output more presentable by giving a formatted output.
For example, SELECT Rollno, Name, ‘was born on’,DOB
Text to be displayed
FROM student;
The above command, on execution, shall display the text “was born on” with every record (tuple)
of the table.
Resultant table: student

Rollno Name was born on DOB
1. Raj Kumar was born on 17-Nov-2000
2. Deep Singh was born on 22-Aug-1996
3. Ankit Sharma was born on 02-Feb-2000
4. Radhika Gupta was born on 03-Dec-1999
5. Payal Goel was born on 21-April-1998
6. Diksha Sharma was born on 17-Dec-1999
7. Gurpreet Kaur was born on 04-Jan-2000
8. Akshay Dureja was born on 05-May-1997
9. Shreya Anand was born on 08-Oct-1999
Relational Database and SQL
10. Prateek Mittal was born on 25-Dec-2000
10 rows in a set (0.02 sec)

12.17 SQL SPECIAL OPERATORS

Apart from several standard library functions discussed earlier, there are some special operators
in SQL that perform some specific functions.

12.39