DISTINCT in MySQL

MySQL DISTINCT
In MySQL, the DISTINCT clause is used with the SELECT statement to retrieve the unique records from the result set.

Syntax:

SELECT DISTINCT expressions  
FROM tables  
WHERE conditions;  

Parameters:
expressions: It is used to specify the columns to be selected.
table_name: It is used to specify the name of the table from which the data needs to be retrieved.
conditions: It is used to specify the conditions to be strictly fulfilled for the selection.

Example 1: Using Distinct Select for single column.
Items table:

ID NAME QUANTITY
1 Electronics 30
2 Sports 45
3 Fashion 50
4 Grocery 30
5 Toys 50

Distinct Select Query:

SELECT DISTINCT quantity  
FROM items;

Output:

QUANTITY
30
45
50

Explanation:
The ‘items’ is an already existing table from which we are fetching the unique quantity of the items.

Example 2: Using Distinct Select for multiple columns.
Items table:

ID NAME QUANTITY
1 Electronics 30
2 Sports 45
3 Fashion 50
4 Grocery 30
5 Toys 50

Distinct Select Query:

SELECT DISTINCT name, quantity
FROM items;

Output:

NAME QUANTITY
Electronics 30
Sports 45
Fashion 50
Grocery 30
Toys 50

Explanation:
The ‘items’ is an already existing table from which we are fetching the unique name and quantity of the items.

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