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 |