删除表

概述

使用oracle语法删除表。

语法

[ WITH [ RECURSIVE ] with_query [, ...] ]
DELETE [ FROM ] [ ONLY ] table_name [ * ] [ [ AS ] alias ]
    [ USING using_list ]
    [ WHERE condition | WHERE CURRENT OF cursor_name ]
    [ RETURNING * | output_expression [ [ AS ] output_name ] [, ...] ]

参数

table_name 表名.
alias 表别名.
using_list 一个表表达式的列表，它允许在WHERE条件中出现 来自其他表的列.
condition 一个返回boolean类型值的表达式.
cursor_name 要在WHERE CURRENT OF情况中使用的游标的名称.
output_expression 在每一行被删除后，会被DELETE计算并且返回的表达式.
output_name 被返回列的名称.

使用

create table tb_test4(id int, flg char(10));

insert into tb_test4 values(1, '2'), (3, '4'), (5, '6');

delete from tb_test4 where id = 1;

delete tb_test4 where id = 3;

table tb_test4;
 id |    flg     
----+------------
 5  | 6         
(1 row)