Question

我有一个名为 gen 的表，其结构如下所示； gen01是主键

gen01    gen02   gen03
    A        2       5
    B        7       9
    C        3      11

我想复制一行并插入表中。所以我写了一个SQL

insert into gen (gen01, gen02, gen03) 
values 
(D, select gen02, gen03 from gen where gen01 = A)

，它报告错误“缺少表达式”。什么原因？谢谢。

Answer 1

尝试一下

insert into gen (gen01, gen02, gen03) 
select 'D', gen02, gen03 
from gen where gen01 = 'A';

Answer 2

您可以尝试类似

insert into your_table (c1, c2, ...)
select c1, c2, ...
from your_table
where id = 1

Answer 3

请使用以下代码。

CREATE TABLE gen(gen01 VARCHAR(100) PRIMARY KEY, gen02 INT, gen03 INT)

INSERT INTO gen(gen01,gen02,gen03)
VALUES('A',2,5),('C',3,11),('B',7,9)

insert into gen (gen01,gen02,gen03) 
select 'D' as gen01,gen02,gen03 from gen where gen01='A';

select * from gen;

复制一行并插入到Oracle的同一表中

3 个答案: