PostgreSQL DELETE 查询

PostgreSQL DELETE 查询用于从表中删除现有记录。您可以使用WHERE子句与DELETE查询一起使用以删除所选的行。否则，将删除所有记录。

语法

带有WHERE子句的DELETE查询的基本语法如下：

DELETE FROM table_name
WHERE [condition];

您可以使用AND或OR运算符组合N个条件。

示例

考虑表COMPANY，记录如下-

# select * from COMPANY;
 id | name  | age | address   | salary
----+-------+-----+-----------+--------
  1 | Paul  |  32 | California|  20000
  2 | Allen |  25 | Texas     |  15000
  3 | Teddy |  23 | Norway    |  20000
  4 | Mark  |  25 | Rich-Mond |  65000
  5 | David |  27 | Texas     |  85000
  6 | Kim   |  22 | South-Hall|  45000
  7 | James |  24 | Houston   |  10000
(7 rows)

以下是一个示例，将删除ID为7的客户−

testdb=# DELETE FROM COMPANY WHERE ID = 2;

现在，COMPANY 表将会有以下记录：

id | name  | age | address     | salary
----+-------+-----+-------------+--------
  1 | Paul  |  32 | California  |  20000
  3 | Teddy |  23 | Norway      |  20000
  4 | Mark  |  25 | Rich-Mond   |  65000
  5 | David |  27 | Texas       |  85000
  6 | Kim   |  22 | South-Hall  |  45000
  7 | James |  24 | Houston     |  10000
(6 rows)