如何通过更新两个字段来插入记录？

Question

我有一个表有5个字段。 5列之一是PK。我的需求是我需要基于某些列（非重复但不是PK）获得行，对于所有返回的结果，我需要分配新的PK并保存。

如果我在我的表中有10条记录。如果我根据某一列获得10条记录。我需要为所有10条记录分配新的PK并保存。最后在表中会有20条记录。有没有执行此操作的任何单个SQL查询？

谢谢！

Answer 1

IF COL1是PK（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... ; 

Answer 2

我不知道如果我理解正确的话，你但这样做你需要什么？

由于您没有给出太多细节，因此您必须填写空格！

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

希望它可以帮助...

Answer 3

-- 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