SQL Server/T-SQL/Transact SQL/Table Variable
Содержание
Creating Inline User-Defined Functions
5>
6> CREATE TABLE employee(
7> id INTEGER NOT NULL PRIMARY KEY,
8> first_name VARCHAR(10),
9> last_name VARCHAR(10),
10> salary DECIMAL(10,2),
11> start_Date DATETIME,
12> region VARCHAR(10),
13> city VARCHAR(20),
14> managerid INTEGER
15> );
16> GO
1> INSERT INTO employee VALUES (1, "Jason" , "Martin", 5890,"2005-03-22","North","Vancouver",3);
2> GO
1> INSERT INTO employee VALUES (2, "Alison", "Mathews",4789,"2003-07-21","South","Utown",4);
2> GO
1> INSERT INTO employee VALUES (3, "James" , "Smith", 6678,"2001-12-01","North","Paris",5);
2> GO
1> INSERT INTO employee VALUES (4, "Celia" , "Rice", 5567,"2006-03-03","South","London",6);
2> GO
1> INSERT INTO employee VALUES (5, "Robert", "Black", 4467,"2004-07-02","East","Newton",7);
2> GO
1> INSERT INTO employee VALUES (6, "Linda" , "Green" , 6456,"2002-05-19","East","Calgary",8);
2> GO
1> INSERT INTO employee VALUES (7, "David" , "Larry", 5345,"2008-03-18","West","New York",9);
2> GO
1> INSERT INTO employee VALUES (8, "James" , "Cat", 4234,"2007-07-17","West","Regina",9);
2> GO
1> INSERT INTO employee VALUES (9, "Joan" , "Act", 6123,"2001-04-16","North","Toronto",10);
2> GO
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
1>
2>
3> CREATE FUNCTION dbo.udf_employee(@EmployeeID int)
4> RETURNS TABLE
5> AS
6> RETURN (SELECT ID, first_name FROM Employee)
7> GO
1>
2> SELECT ID, first_name FROM dbo.udf_employee(2)
3>
4>
5> drop function dbo.udf_employee
6> GO
ID first_name
----------- ----------
1 Jason
2 Alison
3 James
4 Celia
5 Robert
6 Linda
7 David
8 James
9 Joan
1>
2> drop table employee;
3> GO
Define table variable
1> create table employee(
2> ID int,
3> name nvarchar (10),
4> salary int,
5> start_date datetime,
6> city nvarchar (10),
7> region char (1))
8> GO
1>
2> insert into employee (ID, name, salary, start_date, city, region)
3> values (1, "Jason", 40420, "02/01/94", "New York", "W")
4> GO
(1 rows affected)
1> insert into employee (ID, name, salary, start_date, city, region)
2> values (2, "Robert",14420, "01/02/95", "Vancouver","N")
3> GO
(1 rows affected)
1> insert into employee (ID, name, salary, start_date, city, region)
2> values (3, "Celia", 24020, "12/03/96", "Toronto", "W")
3> GO
(1 rows affected)
1> insert into employee (ID, name, salary, start_date, city, region)
2> values (4, "Linda", 40620, "11/04/97", "New York", "N")
3> GO
(1 rows affected)
1> insert into employee (ID, name, salary, start_date, city, region)
2> values (5, "David", 80026, "10/05/98", "Vancouver","W")
3> GO
(1 rows affected)
1> insert into employee (ID, name, salary, start_date, city, region)
2> values (6, "James", 70060, "09/06/99", "Toronto", "N")
3> GO
(1 rows affected)
1> insert into employee (ID, name, salary, start_date, city, region)
2> values (7, "Alison",90620, "08/07/00", "New York", "W")
3> GO
(1 rows affected)
1> insert into employee (ID, name, salary, start_date, city, region)
2> values (8, "Chris", 26020, "07/08/01", "Vancouver","N")
3> GO
(1 rows affected)
1> insert into employee (ID, name, salary, start_date, city, region)
2> values (9, "Mary", 60020, "06/09/02", "Toronto", "W")
3> GO
(1 rows affected)
1>
2> select * from employee
3> GO
ID name salary start_date city region
----------- ---------- ----------- ----------------------- ---------- ------
1 Jason 40420 1994-02-01 00:00:00.000 New York W
2 Robert 14420 1995-01-02 00:00:00.000 Vancouver N
3 Celia 24020 1996-12-03 00:00:00.000 Toronto W
4 Linda 40620 1997-11-04 00:00:00.000 New York N
5 David 80026 1998-10-05 00:00:00.000 Vancouver W
6 James 70060 1999-09-06 00:00:00.000 Toronto N
7 Alison 90620 2000-08-07 00:00:00.000 New York W
8 Chris 26020 2001-07-08 00:00:00.000 Vancouver N
9 Mary 60020 2002-06-09 00:00:00.000 Toronto W
(9 rows affected)
1>
2>
3> DECLARE @MyTable Table (
4> OrderID int,
5> Name char (50)
6> )
7>
8> INSERT INTO @MyTable
9> SELECT ID, Name
10> FROM Employee
11> WHERE ID BETWEEN 1 AND 10
12>
13> SELECT * FROM @MyTable
14>
15>
16> drop table employee
17> GO
(9 rows affected)
OrderID Name
----------- --------------------------------------------------
1 Jason
2 Robert
3 Celia
4 Linda
5 David
6 James
7 Alison
8 Chris
9 Mary
(9 rows affected)
1>
Function to pass an array
4> CREATE FUNCTION dbo.udf_ParseArray( @StringArray varchar(max),@Delimiter char(1) ,@MinRowSelect int,@MaxRowSelect int)
5> RETURNS @StringArrayTable TABLE (RowNum int IDENTITY(1,1), Val varchar(50))
6> AS
7> BEGIN
8> DECLARE @Delimiter_position int
9> IF RIGHT(@StringArray,1) != @Delimiter
10> SET @StringArray = @StringArray + @Delimiter
11> WHILE CHARINDEX(@Delimiter, @StringArray) <> 0
12> BEGIN
13> SELECT @Delimiter_position = CHARINDEX(@Delimiter, @StringArray)
14> INSERT @StringArrayTable VALUES (left(@StringArray, @Delimiter_position - 1))
15> SELECT @StringArray = stuff(@StringArray, 1, @Delimiter_position, "")
16> END
17> DELETE @StringArrayTable
18> WHERE RowNum < @MinRowSelect OR RowNum > @MaxRowSelect
19> RETURN
20> END
21> GO
1>
2> SELECT RowNum, Val
3> FROM udf_ParseArray("A,B,C,D,E,F,G", ",", 3, 5)
4> GO
RowNum Val
----------- --------------------------------------------------
3 C
4 D
5 E
1>
2> drop function dbo.udf_ParseArray
3> GO
1>
Legal custorderdetails Inline Table-Valued Function
5>
6> CREATE TABLE employee(
7> id INTEGER NOT NULL PRIMARY KEY,
8> first_name VARCHAR(10),
9> last_name VARCHAR(10),
10> salary DECIMAL(10,2),
11> start_Date DATETIME,
12> region VARCHAR(10),
13> city VARCHAR(20),
14> managerid INTEGER
15> );
16> 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> CREATE FUNCTION dbo.custorderdetails(
4> @custid char(5)
5> )
6> RETURNS TABLE
7> AS
8> RETURN SELECT
9> OD.ID,
10> OD.Salary
11> FROM
12> Employee AS OD
13> WHERE
14> OD.ID = @custid
15> GO
1>
2> select * from dbo.custorderdetails("1")
3>
4> drop function dbo.custorderdetails
5> GO
ID Salary
----------- ------------
1 5890.00
(1 rows affected)
1>
2>
3>
4> drop table employee;
5> GO
1>
Use return statement to return a table from a function
2>
3> CREATE TABLE Employees (
4> EmployeeID int NOT NULL ,
5> LastName nvarchar (20) NOT NULL ,
6> FirstName nvarchar (10) NOT NULL ,
7> Title nvarchar (30) NULL ,
8> TitleOfCourtesy nvarchar (25) NULL ,
9> BirthDate datetime NULL ,
10> HireDate datetime NULL ,
11> Address nvarchar (60) NULL ,
12> City nvarchar (15) NULL ,
13> Region nvarchar (15) NULL ,
14> PostalCode nvarchar (10) NULL ,
15> Country nvarchar (15) NULL ,
16> HomePhone nvarchar (24) NULL ,
17> Extension nvarchar (4) NULL ,
18> Photo image NULL ,
19> Notes ntext NULL ,
20> ReportsTo int NULL ,
21> PhotoPath nvarchar (255) NULL
22>
23> )
24> GO
1>
2>
3>
4> CREATE TABLE RegionPlace
5> (RegionID nvarchar (20) NOT NULL ,
6> TerritoryDescription nchar (50) NOT NULL ,
7> RegionID int NOT NULL
8> )
9> GO
1>
2> Insert Into RegionPlace Values ("01581","Westboro",1)
3> Insert Into RegionPlace Values ("01730","Bedford",1)
4> Insert Into RegionPlace Values ("01833","Georgetow",1)
5> Insert Into RegionPlace Values ("95060","Santa Cruz",2)
6> Insert Into RegionPlace Values ("98004","Bellevue",2)
7> Insert Into RegionPlace Values ("98052","Redmond",2)
8> Insert Into RegionPlace Values ("98104","Seattle",2)
9> Go
(1 rows affected)
(1 rows affected)
(1 rows affected)
(1 rows affected)
(1 rows affected)
(1 rows affected)
(1 rows affected)
1> CREATE TABLE EmployeeRegion
2> (EmployeeID int NOT NULL,
3> RegionID nvarchar (20) NOT NULL
4> )
5> GO
1>
2> Insert Into EmployeeRegion Values (1,"06897")
3> Insert Into EmployeeRegion Values (1,"19713")
4> Insert Into EmployeeRegion Values (9,"48084")
5> Insert Into EmployeeRegion Values (9,"48304")
6> Insert Into EmployeeRegion Values (9,"55113")
7> Insert Into EmployeeRegion Values (9,"55439")
8> GO
(1 rows affected)
(1 rows affected)
(1 rows affected)
(1 rows affected)
(1 rows affected)
(1 rows affected)
1>
2> CREATE FUNCTION dbo.udf_EmpRegionPlaceTAB (
3> @EmployeeID int
4> ) RETURNS TABLE
5> AS RETURN
6> SELECT TOP 100 PERCENT WITH TIES
7> et.RegionID
8> , t.TerritoryDescription as [Territory]
9> , t.RegionID
10> FROM EmployeeRegion et
11> LEFT OUTER JOIN RegionPlace t
12> ON et.RegionID = t.RegionID
13> WHERE et.EmployeeID = @EmployeeID
14> ORDER BY t.TerritoryDescription
15>
16> GO
1>
2> DECLARE @EmpID int
3> SELECT @EmpID = EmployeeID
4> FROM Employees
5> WHERE FirstName = "Andrew" and LastName = "Fuller"
6>
7> SELECT * FROM udf_EmpRegionPlaceTAB(@EmpID)
8> GO
RegionID Territory RegionID
-------------------- -------------------------------------------------- -----------
(0 rows affected)
1>
2>
3>
4> drop FUNCTION dbo.udf_EmpRegionPlaceTAB;
5> GO
1> drop table EmployeeRegion;
2> drop table RegionPlace;
3> drop table Employees;
4> GO
1>