Page 45 - Modular_V2.0_SQL_Flipbook

+----------+------------+-----+
| Stu_name | DOB | Age |
+----------+------------+-----+
| Zara | 2002-04-01 | 20 |
+----------+------------+-----+
| Raja | 1999-01-08 | 23 |
+----------+------------+-----+
| Lalita | 2001-03-12 | 21 |
+----------+------------+-----+
| Babita | 2003-05-18 | 24 |
+----------+------------+-----+
| Amia | 2000-10-10 | 22 |
+----------+------------+-----+
SELECT Stu_name, DOB, Age FROM STUDENTS WHERE Age > 18 ORDER BY DOB DESC;
The above stated query will be sorting the data based on a criteria of age but it will sort that data
(DOB) in descending order.

Output will be:
+----------+------------+-----+
| Stu_name | DOB | Age |
+----------+------------+-----+
| Babita | 2003-05-18 | 24 |
+----------+------------+-----+
| Zara | 2002-04-01 | 20 |
+----------+------------+-----+
| Lalita | 2001-03-12 | 21 |
+----------+------------+-----+
| Amia | 2000-10-10 | 22 |
+----------+------------+-----+
| Raja | 1999-01-08 | 23 |
+----------+------------+-----+
If you have not specified ASC or DESC after the ORDER BY clause, the ASC is used by default.

FUNCTION

A function is a set of predefined commands that perform specific operation to return a value to the
program. Arguments and parameters are the ways to pass values to the functions.
Some of the common functions used in MySQL are as follows:

String functions Numeric functions Date and Time functions

String Functions

Strings can be handled in many ways in MySQL. Some commonly used string functions are being
discussed below:
S.No. Function Purpose Functionality

SELECT CHAR (70);
Returns the character for each
Output: F
1 CHAR( ) integer value passed as an
SELECT CHAR (65);
argument
Output: A
Returns concatenated string Select CONCAT ("ram", "sham");
2 CONCAT( )
(joins the strings back to back) Output: ramsham

43
More on MySQL