в 13:46, 26 мая 2010

2010-05-26T13:46:16Z

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2010-05-26T10:24:58Z

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== SET IDENTITY_INSERT Employee ON==



<source lang="sql">
INSERT Employee
(DepartmentID, Name, GroupName)
VALUES (17, "Database Services", "Information Technology")
SET IDENTITY_INSERT Employee OFF</source>

== Using the IDENTITY_INSERT Session Option==



<source lang="sql">
If you want to supply your own explicit values for the IDENTITY column in an INSERT statement, you have to turn the session option IDENTITY_INSERT to ON for your table.
You can"t update an IDENTITY column.
8>
9> CREATE TABLE MyTable (
10> key_col int NOT NULL IDENTITY (1,1),
11> abc char(1) NOT NULL
12> )
13> INSERT INTO MyTable VALUES ("a")
14> INSERT INTO MyTable VALUES ("b")
15> INSERT INTO MyTable VALUES ("c")
16> SELECT * FROM MyTable ORDER BY key_col
17>
18>
19> SET IDENTITY_INSERT MyTable ON
20>
21> INSERT INTO MyTable (key_col, abc) VALUES(2, "g")
22> SELECT
23> *
24> FROM
25> MyTable
26> ORDER BY
27> key_col
28> GO
(1 rows affected)
(1 rows affected)
(1 rows affected)
key_col abc
----------- ---
1 a
2 b
3 c
(1 rows affected)
key_col abc
----------- ---
1 a
2 b
2 g
3 c
(4 rows affected)
1>
2> SET IDENTITY_INSERT MyTable OFF
3>
4> drop table MyTable
5> GO
1></source>

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SQL Server/T-SQL Tutorial/Sequence Indentity/IDENTITY INSERT - История изменений

в 13:46, 26 мая 2010

Admin: 1 версия