WHERE clause in MariaDB

MariaDB WHERE
To filter the results, the MariaDB WHERE clause is used with SELECT, INSERT, UPDATE and DELETE statements.

Syntax:

WHERE conditions;

Parameters:
conditions: It is used to specify the conditions to be strictly followed for selection.

Example: Selecting specific fields from a table.
Students table:

ID	NAME	AGE
1	Joy	5
2	Smiley	13
3	Happy	11
4	Tom	15
5	Jerry	10
6	Bruno	6
7	David	8
8	Kim	9
9	Crystal	6
10	Don	4

Query:

SELECT name, age  
FROM students  
WHERE  age > 10  
ORDER BY name;

Output:

ID	NAME	AGE
3	Happy	11
2	Smiley	13
4	Tom	15

Example: Using WHERE clause with AND condition.
Students table:

ID	NAME	AGE
1	Joy	5
2	Smiley	13
3	Happy	11
4	Tom	15
5	Jerry	10
6	Bruno	6
7	David	8
8	Kim	9
9	Crystal	6
10	Don	4

Query:

SELECT name, age  
FROM students  
WHERE  age > 10  
AND age < 15
ORDER BY name;

Output:

ID	NAME	AGE
3	Happy	11
2	Smiley	13

Example: Using WHERE clause with OR condition.
Students table:

ID	NAME	AGE
1	Joy	5
2	Smiley	13
3	Happy	11
4	Tom	15
5	Jerry	10
6	Bruno	6
7	David	8
8	Kim	9
9	Crystal	6
10	Don	4

Query:

SELECT name, age  
FROM students  
WHERE  age = 10  
OR age = 15
ORDER BY name;

Output:

ID	NAME	AGE
5	Jerry	10
4	Tom	15

Example: Using WHERE clause with both AND and OR condition.
Students table:

ID	NAME	AGE
1	Joy	5
2	Smiley	13
3	Happy	11
4	Tom	15
5	Jerry	10
6	Bruno	6
7	David	8
8	Kim	9
9	Crystal	6
10	Don	4

Query:

SELECT name, age  
FROM students  
WHERE  ( age > 10  AND id = 2 )
OR age = 15
ORDER BY name;

Output:

ID	NAME	AGE
2	Smiley	13
4	Tom	15

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