PostgreSQL Where
The PostgreSQL WHERE clause is used to return records that meet the conditions in a select.
Where syntax
-- select the records that meet the condition
SELECT * FROM table_name WHERE {condition}
SELECT * FROM view_name WHERE {condition}
SELECT * FROM A, B WHERE A.id=B.id
Where example
Goods table
id | good_type | name | description | price | insert_date |
---|
1 | A | Car_1 | Car 1 description | 100 | 2018-07-21 08:45:57.311809 |
2 | A | Car_2 | Car 2 description | 200 | 2018-07-21 08:45:57.311809 |
3 | A | Car_3 | Car 3 description | 100 | 2018-07-21 08:45:57.311809 |
4 | B | Boat_4 | Boat 4 description | 500 | 2018-07-21 08:45:57.311809 |
5 | B | Boat_5 | Boat 5 description | 300 | 2018-07-21 08:45:57.311809 |
6 | C | Train_1 | Train 123 description | 800 | 2018-07-21 08:45:57.311809 |
SELECT * FROM goods WHERE price = 100;
Result
id | good_type | name | description | price | insert_date |
---|
1 | A | Car_1 | Car 1 description | 100 | 2018-07-21 08:45:57.311809 |
3 | A | Car_3 | Car 3 description | 100 | 2018-07-21 08:45:57.311809 |