将table2中每个元素的值添加到table1中，并将table1中的MAX（id）+1用作table2 id

Question

I have table1 and table2 and want to do something like the following:

INSERT INTO table1 (ID, OWNER_ID, NAME) SELECT (SELECT MAX(ID) FROM table1) + 1, ID, 'value' FROM table2

The query above does not work and returns:

Unique index or primary key violation: "PRIMARY KEY ON PUBLIC.table1(ID)"; SQL statement:

Any help please?

table1 :

| ID | OWNER_ID | NAME |
| --- | ---- | --- |

ŧable2 :

| ID | OWNER_ID_REF | NAME |
| --- | ---- | --- |

Thanks

Answer 1

set @i:=(SELECT MAX(ID) FROM table1);
INSERT INTO table1 (ID, OWNER_ID, NAME) SELECT @i:=@i+1, ID, 'value' FROM table2

try this query it will work fine

Answer 2

It looks like ID is a primary key column in table1 . Your current insert will most likely be inserting the same ID value multiple times, because the max subquery will have the same value for each record in table2 . Assuming ID is auto increment, you probably should not be assigning a value to it anyway. Here is one option:

INSERT INTO table1 (OWNER_ID, NAME)
SELECT ID, 'value'
FROM table2;

Answer 3

You are using SELECT (SELECT MAX(ID) FROM table1) + 1, ID, 'value' FROM table2

When you are inserting Through select Max(ID)+1 give sample value all the records for table2

Use something like this...

Create table #tt( id int primary key ,Name varchar(200))

declare @vaue int = (select max(id) from #tt)

insert into #tt select row_number() over(order by id) + @vaue ,Name from #tt