Seed value was negative and the increment was positive : IDENTITY « Sequence « SQL Server / T-SQL






  1. SQL Server / T-SQL
  2. Sequence
  3. IDENTITY

Seed value was negative and the increment was positive


1>
2> -- Seed value was negative and the increment was positive:
3>
4> CREATE TABLE MyTable (MyID Int IDENTITY(-1000000, 100) NOT NULL
5>                       ,MyDescription NVarChar(50) NOT NULL)
6> GO
1> insert mytable (mydescription) values ('a');
2> GO

(1 rows affected)
1> insert mytable (mydescription) values ('b');
2> GO

(1 rows affected)
1> insert mytable (mydescription) values ('c');
2> GO

(1 rows affected)
1> select * from mytable
2> GO
MyID        MyDescription
----------- --------------------------------------------------
   -1000000 a
    -999900 b
    -999800 c

(3 rows affected)
1>
2> drop table MyTable
3> GO
1>








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5.Now you explicitly enter a value for Identity column
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8.Get current IDENTITY value
9.Created with an IDENTITY property that is set to start at 1,000,000 and decrement by 100 for every row added
10.IDENTITY [ (seed , increment ) ]
11.IDENTITY as PRIMARY KEY