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我有一个包含 5 个字段的表。5列中的一列是PK。我的要求是我需要根据某些列(非重复但不是 PK)获取行,并且对于所有返回的结果,我需要分配新的 PK 并保存。

如果我的表中有 10 条记录。如果我根据某个列获得 10 条记录。我需要为所有 10 条记录分配新的 PK 并保存。最后,表中将有 20 条记录。是否有执行此操作的单个 SQL 查询?

谢谢!

4

3 回答 3

1
--  create a sequence to manage the primary keys
create sequence key_sequence;

--  i don't know what data you want in your table
create table tempTable (
myKey int primary key,
myValue varchar(12))

--  create four rows of arbitrary data, they will get primary keys of 1,2,3 and 4
insert into tempTable values (key_sequence.nextval, 'eggs')
insert into tempTable values (key_sequence.nextval, 'bacon')
insert into tempTable values (key_sequence.nextval, 'chips')
insert into tempTable values (key_sequence.nextval, 'salad')

--  you can see the 4 rows
select * from tempTable

--  select all four rows (as no where clause) and re-insert them into the table
--  the sequence will take care of allocating new primary keys
insert into tempTable
select  key_sequence.nextval, myValue 
from    tempTable

--  now you can see eight rows in the table
select * from tempTable
于 2012-07-05T10:46:21.517 回答
0

IF col1 是 PK(用于自动增量列)

insert into table (col1, col2, col3, col4, col5) 
    select null, col2, col3, col4, col5 
    from table 
    where col2 = 'anyvalue' and more conditions... ;
于 2012-07-05T10:43:31.990 回答
0

我不确定我是否正确理解了您,但这会满足您的需要吗?

由于您没有提供太多详细信息,因此您必须填写空白!

INSERT INTO <table> (
   pk_col,
   col2,
   col3,
   col4,
   col5
)
   SELECT <new_pk>,
          col2,
          col3,
          col4,
          col5
     FROM <table>
    WHERE <your search criteria>;

希望能帮助到你...

于 2012-07-05T10:43:45.833 回答