SQL Server/T-SQL Tutorial/Transact SQL/Delete Statement — различия между версиями
Admin (обсуждение | вклад) м (1 версия) |
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(нет различий)
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Текущая версия на 10:22, 26 мая 2010
Содержание
Archiving end user data.
5>
6>
7> CREATE TABLE myusers(
8> UserID varchar(30)NOT NULL PRIMARY KEY,
9> FirstName varchar(30),
10> LastName varchar(30),
11> EmployeeType char(1) NOT NULL,
12> DBAccess varchar(30),
13> StartDate datetime,
14> ExpDate datetime
15> )
16> GO
1> CREATE TABLE oldusers(
2> UserID varchar(30),
3> FirstName varchar(30),
4> LastName varchar(30),
5> EmployeeType char(1) NOT NULL,
6> DBAccess varchar(30),
7> StartDate datetime,
8> ExpDate datetime
9> )
10> GO
1>
2> CREATE PROC pr_copyuser (@UID varchar(30) )
3> AS
4> INSERT INTO oldusers SELECT * FROM myusers WHERE UserID = @UID
5> DELETE myusers WHERE UserID = @UID
6> GO
1>
2> drop PROC pr_copyuser;
3> GO
1>
2>
3> drop table oldusers;
4> drop table myusers;
5> GO
Creation Script for the usp_EmployeeDelete Stored Procedure
5>
6>
7> CREATE TABLE OrderDetails(
8> ID int NOT NULL,
9> PartID int NOT NULL,
10> Quantity int NOT NULL);
11> GO
1>
2> INSERT INTO OrderDetails VALUES(10001, 11, 12)
3> INSERT INTO OrderDetails VALUES(10001, 42, 10)
4> INSERT INTO OrderDetails VALUES(10001, 72, 5)
5> INSERT INTO OrderDetails VALUES(10002, 14, 9)
6> INSERT INTO OrderDetails VALUES(10002, 51, 40)
7> INSERT INTO OrderDetails VALUES(10003, 41, 10)
8> INSERT INTO OrderDetails VALUES(10003, 61, 35)
9> INSERT INTO OrderDetails VALUES(10003, 65, 15)
10>
11> GO
(1 rows affected)
(1 rows affected)
(1 rows affected)
(1 rows affected)
(1 rows affected)
(1 rows affected)
(1 rows affected)
(1 rows affected)
1>
2>
3> CREATE TABLE Employees
4> (orderid int NOT NULL,
5> mgrid int NULL,
6> empname varchar(25) NOT NULL,
7> salary money NOT NULL);
8> GO
1>
2> INSERT INTO employees(orderid, mgrid, empname, salary) VALUES( 1, NULL, "Nancy", $10000.00)
3> INSERT INTO employees(orderid, mgrid, empname, salary) VALUES( 2, 1, "Andrew", $5000.00)
4> INSERT INTO employees(orderid, mgrid, empname, salary) VALUES( 3, 1, "Janet", $5000.00)
5> INSERT INTO employees(orderid, mgrid, empname, salary) VALUES( 4, 1, "Margaret",$5000.00)
6> INSERT INTO employees(orderid, mgrid, empname, salary) VALUES( 5, 2, "Steven", $2500.00)
7> GO
(1 rows affected)
(1 rows affected)
(1 rows affected)
(1 rows affected)
(1 rows affected)
1>
2>
3> CREATE PROC dbo.usp_EmployeeDelete
4> @orderid int
5> AS
6> BEGIN TRAN
7> -- delete matching rows from OrderDetails
8> DELETE FROM OrderDetails WHERE id = @orderid
9> -- delete row from Employee
10> DELETE FROM Employee WHERE orderid = @orderid
11> COMMIT TRAN
12> GO
1>
2>
3> drop proc dbo.usp_EmployeeDelete;
4> GO
1> drop table Employees;
2> GO
1>
2> drop table OrderDetails;
3> GO
1>
Delete record in a stored procedure by parameter
3>
4>
5>
6> CREATE TABLE Product(
7> ProductID int NOT NULL,
8> Name nvarchar(25) NOT NULL,
9> ProductNumber nvarchar(25) ,
10> Color nvarchar(15) NULL,
11> StandardCost money NOT NULL,
12> Size nvarchar(5) NULL,
13> Weight decimal(8, 2) NULL,
14> ProductLine nchar(20) NULL,
15> SellStartDate datetime NOT NULL,
16> SellEndDate datetime NULL
17> )
18> GO
1> insert into Product values(1,"Product A", "1","Red",123.123,"1",1,"ProductLine A","1999-03-22","2000-03-22");
2> GO
(1 rows affected)
1> insert into Product values(2,"Product B", "2","Yellow",234.234,"1",3,"ProductLine B","2000-03-22","2001-03-22");
2> GO
(1 rows affected)
1> insert into Product values(3,"Product C", "3","Pink",345.345,"1",3,"ProductLine V","2001-09-22","2006-02-22");
2> GO
(1 rows affected)
1> insert into Product values(4,"Product D", "4","White",456.456,"1",4,"ProductLine D","2002-08-22","2006-03-22");
2> GO
(1 rows affected)
1> insert into Product values(5,"Product E", "5","Black",567.567,"1",5,"ProductLine E","2003-01-22","2003-04-22");
2> GO
(1 rows affected)
1> insert into Product values(6,"Product F", "6","Blue",678.678,"1",6,"ProductLine W","2004-02-22","2005-05-22");
2> GO
(1 rows affected)
1> insert into Product values(7,"Product G", "7","Drak",789.789,"1",7,"ProductLine Q","2005-03-22","2006-03-22");
2> GO
(1 rows affected)
1> insert into Product values(8,"Product H", "8","Gray",234.123,"1",8,"ProductLine F","2006-04-22","2006-09-22");
2> GO
(1 rows affected)
1> insert into Product values(9,"Product I", "9","Red",543.123,"1",9,"ProductLine R","2007-05-22","2008-03-22");
2> GO
(1 rows affected)
1> insert into Product values(0,"Product J", "0","Gold",765.123,"1",0,"ProductLine J","2008-06-22","2009-03-22");
2> GO
(1 rows affected)
1>
2> CREATE PROCEDURE spProduct_Delete
3> @ID Int
4> AS
5> DELETE FROM Product
6> WHERE ProductID = @ID
7> GO
1>
2>
3> drop PROCEDURE spProduct_Delete;
4> GO
1>
2>
3> drop table Product;
4> GO
Deleting Rows in Chunks
7>
8> CREATE TABLE employee(
9> id INTEGER NOT NULL PRIMARY KEY,
10> first_name VARCHAR(10),
11> last_name VARCHAR(10),
12> salary DECIMAL(10,2),
13> start_Date DATETIME,
14> region VARCHAR(10),
15> city VARCHAR(20),
16> managerid INTEGER
17> );
18> 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>
4> WHILE (SELECT COUNT(*) FROM employee) > 0
5> BEGIN
6> DELETE TOP(2)
7> FROM employee
8> END
9> GO
(2 rows affected)
(2 rows affected)
(2 rows affected)
(2 rows affected)
(1 rows affected)
1>
2>
3> drop table employee;
4> GO
Dynamic Deletes
4>
5>
6>
7>
8> CREATE PROCEDURE prDeleteData
9> @chvTable VARCHAR(30)
10> AS
11> DECLARE @chvSQL VARCHAR(255)
12> SELECT @chvSQL = "DELETE " + @chvTable
13> EXEC (@chvSQL)
14> GO
1>
2> drop PROCEDURE prDeleteData;
3> GO
1>