FROM clause in MySQL

MySQL FROM In MySQL, the FROM clause is used with the MySQL SELECT statement to specify the table for the records to be retrieved.

Syntax: To select all fields from a table.

SELECT * FROM table_name;

Example: Selecting all fields from a table.

SELECT * FROM items;

Output:

ID	NAME	QUANTITY
1	Electronics	30
2	Sports	45
3	Fashion	100
4	Grocery	90
5	Toys	50

 

Syntax: To select specific fields from a table.

SELECT expressions  
FROM table_name
WHERE conditions;

Parameters:

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

Example: Selecting specific fields from a table.

SELECT *  
FROM items  
WHERE  id > 3;

Output:

ID	NAME	QUANTITY
4	Grocery	90
5	Toys	50

 

Syntax: To select specific fields from multiple tables.

SELECT expressions  
FROM table1
INNER JOIN table2 
ON join_predicate;

Parameters:

join_predicate: It is used to specify the condition for joining tables.

Example: Selecting specific fields from multiple tables. Items Table:

ID	NAME	QUANTITY
1	Electronics	30
2	Sports	45
3	Fashion	100
4	Grocery	90
5	Toys	50

Shops Table:

ID	SHOP
1	A
2	B
3	C
4	D

SELECT items.quantity, shops.shop
FROM items  
INNER JOIN shops  
ON items.id = shops.id  
ORDER BY quantity;

Output:

QUANTITY	SHOP
30	A
45	B
90	C
100	D