How do I insert into a table that only has a single (identity) column?

  • I have a table with only 1 column "fldID". That column is a primary key (to ensure uniqueness), identity column with a seed of 9000. How do I insert a new record into this table so that I can return it's value for "fldID" ? The table is being used to generate new unique numbers.

    I want to be able to insert a record and return the new ID that was generated starting at 9000, 9001, 9002 etc... however scripting the table as an INSERT statement produces code that errors. I assume because:
             INSERT INTO [dbo].[tblOrderNumberLog])  VALUES)
    I get the error
    Msg 102, Level 15, State 1, Line 4
    Incorrect syntax near ')'.

    I thought about adding a second column and just inserting the number '1' or something but it seems to be a waste of space and I would like to be able to do it with a single column.

  • Not sure what this table is for, you could use Sequences

    declare @i int
    insert into [dbo].[tblOrderNumberLog] default values

    set @i = SCOPE_IDENTITY()

    select @i

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  • r.gall - Tuesday, January 15, 2019 10:26 AM

    I have a table with only 1 column "fldID". That column is a primary key (to ensure uniqueness), identity column with a seed of 9000. How do I insert a new record into this table so that I can return it's value for "fldID" ? The table is being used to generate new unique numbers.

    I want to be able to insert a record and return the new ID that was generated starting at 9000, 9001, 9002 etc... however scripting the table as an INSERT statement produces code that errors. I assume because:
             INSERT INTO [dbo].[tblOrderNumberLog])  VALUES)
    I get the error
    Msg 102, Level 15, State 1, Line 4
    Incorrect syntax near ')'.

    I thought about adding a second column and just inserting the number '1' or something but it seems to be a waste of space and I would like to be able to do it with a single column.

    Have you considered using a SEQUENCE for this?

    The absence of evidence is not evidence of absence.
    Martin Rees

    You can lead a horse to water, but a pencil must be lead.
    Stan Laurel

  • r.gall - Tuesday, January 15, 2019 10:26 AM

    I have a table with only 1 column "fldID". That column is a primary key (to ensure uniqueness), identity column with a seed of 9000. How do I insert a new record into this table so that I can return it's value for "fldID" ? The table is being used to generate new unique numbers.

    I want to be able to insert a record and return the new ID that was generated starting at 9000, 9001, 9002 etc... however scripting the table as an INSERT statement produces code that errors. I assume because:
             INSERT INTO [dbo].[tblOrderNumberLog])  VALUES)
    I get the error
    Msg 102, Level 15, State 1, Line 4
    Incorrect syntax near ')'.

    I thought about adding a second column and just inserting the number '1' or something but it seems to be a waste of space and I would like to be able to do it with a single column.

    Not real sure about that script or what you were trying with the one parenthesis but you would need to set identity insert on and refer to the column. So something like:
    SET IDENTITY_INSERT tblOrderNumberLog ON;

    INSERT INTO tblOrderNumberLog
    (WhateverIsTheColumnName)
    VALUES
    (9001), (9002), (9003);

    SET IDENTITY_INSERT tblOrderNumberLog OFF;

    If you want to get the last identity value for a table, you can use IDENT_CURRENT,
    SELECT IDENT_CURRENT('tblOrderNumberLog');

    Sue

  • You can use set identity_insert table_name on
    e.g:
    set identity_insert [dbo].[tblOrderNumberLog] ON
    INSERT INTO [dbo].[tblOrderNumberLog](ID)
     select row_number() over (order by (select null))
    from sys.columns
    set identity_insert [dbo].[tblOrderNumberLog] OFF

  • r.gall - Tuesday, January 15, 2019 10:26 AM

         INSERT INTO [dbo].[tblOrderNumberLog])  VALUES)

    I agree with everyone suggesting you replace this pattern with a Sequence object instead. You are setting yourself up for problems down the road.

    That being said, this is the answer to your question:
    INSERT dbo.tblOrderNumberLog DEFAULT VALUES;

    If you roll back the transaction that inserts the row, the identity value will still advance, but you won't use any storage (this is a hack that fakes a Sequence. You should still use a Sequence):
    set nocount on;
    DECLARE @a int, @b-2 int, @C int;
    CREATE TABLE #a(id int identity(9000, 1) NOT NULL PRIMARY KEY);

    BEGIN TRANSACTION;
    INSERT #a DEFAULT VALUES;
    SELECT SCOPE_IDENTITY() AS NewIDValue;
    ROLLBACK TRANSACTION;
    BEGIN TRANSACTION;
    INSERT #a DEFAULT VALUES;
    SELECT SCOPE_IDENTITY() AS NewIDValue;
    ROLLBACK TRANSACTION;
    BEGIN TRANSACTION;
    INSERT #a DEFAULT VALUES;
    SELECT SCOPE_IDENTITY() AS NewIDValue;
    ROLLBACK TRANSACTION;
    SELECT count(*) AS [RowsInTable] FROM #a;

    NewIDValue
    ---------------------------------------
    9000

    NewIDValue
    ---------------------------------------
    9001

    NewIDValue
    ---------------------------------------
    9002

    RowsInTable
    -----------
    0

    Eddie Wuerch
    MCM: SQL

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