Page 33 - Modular_V2.0_SQL_Flipbook

Using IN Operator

SELECT * FROM PRODUCTS WHERE Brand IN ('Montblanc','Parker');
+------------+--------------+-----------+-------+-----------+
| Product_id | Product_name | Brand | Price | Status |
+------------+--------------+-----------+-------+-----------+
| P101 | Pen | Montblanc | 100 | Available |
+------------+--------------+-----------+-------+-----------+
| P102 | Pencil | Parker | 50 | Available |
+------------+--------------+-----------+-------+-----------+
Using LIKE Operator

You can use the wildcards (*_and %) with the WHERE clause to specify condition. The *_wildcard
denotes a single character, on the other hand the % wildcard denotes the multiple characters:

SELECT Product_name,Price FROM PRODUCTS WHERE Brand LIKE 'c%';

+--------------+-------+
| Product_name | Price |
+--------------+-------+
| Geometry Box | 200 |
+--------------+-------+
SELECT Price FROM PRODUCTS WHERE Product_name LIKE 'p%';
+-------+
| Price |
+-------+
| 100 |
+-------+
| 50 |
+-------+
MYSQL COMMENTS

Comments are used by programmers to explain the code they are creating in order to make it
understandable for others. This code is non executable and carry only representational purpose.

There are two types of Comments used in SQL statements:
1. Single Line Comments: It begins with -- (Two hyphens) and anything written on the next line
once enter key is pressed is not a part of that comment and is considered executable code.

Example:

-- This is a single line comment.
Select * from PRODUCTS;

2. Multi-line Comments: It begins with /* and ends with */. Any text in between will not be
executable.

Example:
/* This is a multi-line comment.

The comment still continues.
It will end now. */

Select * from PRODUCTS;

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Handling Records in MySQL