CODEWITHSUNDEEP
sqlsql-serversql-server-2008-r2auto-increment
tleef
tleef

Reputation: 3594

Insert row with id into a table with auto increment on

I'm wondering if it is possible to "re-insert" a row back into a table that has auto-increment on the Id column. I have an "unprocessed" table and a "processed" table, "unprocessed" has auto-increment and when they are processed they move to the "processed" table and keep the same id. It is possible for a row to move back to "unprocessed" so I would need to be able to "re-insert" this row with the same Id again. Just in case I wasn't clear, I know from the definition of the problem that there will never be a collision between the Ids.

Also, this is being done on SQL Server 2008 R2

Thanks, Tom

Upvotes: 4

Views: 11995

Answers (2)

Najzero
Najzero

Reputation: 3212

Yes this is possible, you simply supply the ID column with the desired value in your INSERT statement and enable "set identity_insert" first for the desired table (and disable it afterwards for safty)

This is pretty much this (pseudo code):

INSERT #1 --created id 1
INSERT #2 --created 2
INSERT #3 -- created 3
DELETE 2 --2 gone, leaves a gap
set identity_insert your_table on
INSERT VALUES ( 2, ... ) -- filled gap again
set identity_insert your_table off

Anyway, I would recommend using a flag in one table, if nothing speaks against it.

So you can simply flip the flag and you will never have to struggle/ensure your ids

Upvotes: 4

podiluska
podiluska

Reputation: 51514

Yes.

set identity_insert YourTable on
insert YourTable (YourID, OtherField) values ( ... 
set identity_insert YourTable off

Upvotes: 4

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