SQL Server/T-SQL Tutorial/System Settings/OBJECT ID
Содержание
Check existance of a view by using OBJECT_ID
6> IF OBJECT_ID("dbo.VCustsWithOrders") IS NOT NULL
7> DROP VIEW dbo.VCustsWithOrders;
8> GO
Code that tests for the existence of a temporary table
IF OBJECT_ID("tempdb..#AllUserTables") IS NOT NULL
DROP TABLE #AllUserTables
SELECT object_id("employee")
5> CREATE TABLE employee(
6> id INTEGER NOT NULL PRIMARY KEY,
7> first_name VARCHAR(10),
8> last_name VARCHAR(10),
9> salary DECIMAL(10,2),
10> start_Date DATETIME,
11> region VARCHAR(10),
12> city VARCHAR(20),
13> managerid INTEGER
14> );
15> GO
1> INSERT INTO employee VALUES (1, "Jason" , "Martin", 5890,"2005-03-22","North","Vancouver",3);
2> GO
(1 rows affected)
1> INSERT INTO employee VALUES (2, "Alison", "Mathews",4789,"2003-07-21","South","Utown",4);
2> GO
(1 rows affected)
1> INSERT INTO employee VALUES (3, "James" , "Smith", 6678,"2001-12-01","North","Paris",5);
2> GO
(1 rows affected)
1> INSERT INTO employee VALUES (4, "Celia" , "Rice", 5567,"2006-03-03","South","London",6);
2> GO
(1 rows affected)
1> INSERT INTO employee VALUES (5, "Robert", "Black", 4467,"2004-07-02","East","Newton",7);
2> GO
(1 rows affected)
1> INSERT INTO employee VALUES (6, "Linda" , "Green" , 6456,"2002-05-19","East","Calgary",8);
2> GO
(1 rows affected)
1> INSERT INTO employee VALUES (7, "David" , "Larry", 5345,"2008-03-18","West","New York",9);
2> GO
(1 rows affected)
1> INSERT INTO employee VALUES (8, "James" , "Cat", 4234,"2007-07-17","West","Regina",9);
2> GO
(1 rows affected)
1> INSERT INTO employee VALUES (9, "Joan" , "Act", 6123,"2001-04-16","North","Toronto",10);
2> GO
(1 rows affected)
1>
2> select * from employee;
3> GO
id first_name last_name salary start_Date region city managerid
----------- ---------- ---------- ------------ ----------------------- ---------- -------------------- -----------
1 Jason Martin 5890.00 2005-03-22 00:00:00.000 North Vancouver 3
2 Alison Mathews 4789.00 2003-07-21 00:00:00.000 South Utown 4
3 James Smith 6678.00 2001-12-01 00:00:00.000 North Paris 5
4 Celia Rice 5567.00 2006-03-03 00:00:00.000 South London 6
5 Robert Black 4467.00 2004-07-02 00:00:00.000 East Newton 7
6 Linda Green 6456.00 2002-05-19 00:00:00.000 East Calgary 8
7 David Larry 5345.00 2008-03-18 00:00:00.000 West New York 9
8 James Cat 4234.00 2007-07-17 00:00:00.000 West Regina 9
9 Joan Act 6123.00 2001-04-16 00:00:00.000 North Toronto 10
(9 rows affected)
1>
2>
3> SELECT id
4> FROM sysobjects
5> WHERE name ="employee"
6> GO
id
-----------
1385771994
(1 rows affected)
1>
2> SELECT object_id("employee")
3> GO
-----------
1385771994
(1 rows affected)
1>
2>
3> drop table employee;
4> GO
1>
2>
The syntax of the OBJECT_ID function
OBJECT_ID("object")
The syntax of the DB_ID function
DB_ID("database")
Use OBJECT_ID in insert statement
3> CREATE TABLE mytable
4> (
5> int_val int,
6> smallint_val smallint,
7> numeric_val numeric(8, 2),
8> tiny_const tinyint,
9> float_val float,
10> date_val datetime,
11> char_strng char(10)
12> )
13> GO
1>
2> DECLARE @myvar1 numeric(8, 2)
3> SELECT @myvar1=65.45
4>
5> INSERT mytable (int_val, smallint_val, numeric_val, tiny_const,
6> float_val, date_val, char_strng)
7> VALUES
8> (OBJECT_ID("mytable"), @@spid, @myvar1 / 10.0, 5,
9> SQRT(144), GETDATE(), REPLICATE("A", 3) + REPLICATE("B", 3))
10> GO
(1 rows affected)
1>
2> SELECT * FROM mytable
3> GO
int_val smallint_val numeric_val tiny_const float_val date_val char_strng
----------- ------------ ----------- ---------- ------------------------ ----------------------- ----------
1019202731 51 6.55 5 12 2008-08-17 13:19:00.380 AAABBB
(1 rows affected)
1>
2>
3> drop table myTable;
4> GO
1>
2>