SQL Server/T-SQL Tutorial/Procedure Function/Alter procedure
Содержание
ALTER PROC Statement Using WITH RECOMPILE
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12> 13> 14> CREATE TABLE employee( 15> id INTEGER NOT NULL PRIMARY KEY, 16> first_name VARCHAR(10), 17> last_name VARCHAR(10), 18> salary DECIMAL(10,2), 19> start_Date DATETIME, 20> region VARCHAR(10), 21> city VARCHAR(20), 22> managerid INTEGER 23> ); 24> 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> Create PROC usp_GetEmployee( 5> @Start_Date AS datetime 6> ) 7> WITH RECOMPILE 8> AS 9> SELECT 10> * 11> FROM 12> Employee 13> WHERE 14> Start_Date >= @Start_Date 15> GO 1> 2> 3> ALTER PROC usp_GetEmployee( 4> @Start_Date AS datetime 5> ) 6> WITH RECOMPILE 7> AS 8> SELECT 9> * 10> FROM 11> Employee 12> WHERE 13> Start_Date >= @Start_Date 14> GO 1> 2> drop procedure usp_GetEmployee 3> GO 1> 2> 3> drop table employee; 4> GO</source>
Execute as
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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> 4> CREATE PROCEDURE dbo.usp_employee 5> @SchemaAndTable nvarchar(255) 6> AS 7> EXEC ("SELECT COUNT(*) FROM " + @SchemaAndTable) 8> GO 1> 2> EXEC dbo.usp_employee "Employee" 3> GO
9
1> 2> ALTER PROCEDURE dbo.usp_employee 3> @SchemaAndTable nvarchar(255) 4> WITH EXECUTE AS "YourName" 5> AS 6> EXEC ("SELECT COUNT(*) FROM " + @SchemaAndTable) 7> GO 1> 2> drop procedure dbo.usp_employee 3> GO 1> 2> drop table employee; 3> GO 1></source>
Modifying a Stored Procedure
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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> CREATE PROCEDURE dbo.usp_employee 3> @Name nvarchar(50), 4> @DeptCount int OUTPUT 5> AS 6> SELECT first_Name 7> FROM employee 8> WHERE city = @Name 9> SELECT @DeptCount = @@ROWCOUNT 10> GO 1> 2> DECLARE @DeptCount int 3> EXEC dbo.usp_employee "Vancouver", 4> @DeptCount OUTPUT 5> PRINT @DeptCount 6> GO first_Name
Jason (1 rows affected) 1 1> 2> ALTER PROCEDURE dbo.usp_employee 3> @GroupName nvarchar(50) 4> AS 5> SELECT first_name 6> FROM Employee 7> WHERE city = @GroupName 8> SELECT @@ROWCOUNT DepartmentCount 9> GO 1> 2> EXEC dbo.usp_Employee "Research and Development" 3> 4> 5> drop procedure dbo.usp_Employee 6> GO first_name
(0 rows affected) DepartmentCount
0
(1 rows affected) 1> drop table employee; 2> GO 1></source>
The syntax of the ALTER PROC statement
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ALTER {PROC|PROCEDURE} procedure_name [parameter declarations] [WITH {RECOMPILE|ENCRYPTION|RECOMPILE,ENCRYPTION}] AS sql_statements A statement that creates a procedure 13> 14> 15> 16> create table Bankers( 17> BankerID Integer, 18> BankerName VARCHAR(20), 19> BankerContactLName VARCHAR(20), 20> BankerContactFName VARCHAR(20), 21> BankerCity VARCHAR(20), 22> BankerState VARCHAR(20), 23> BankerZipCode VARCHAR(20), 24> BankerPhone VARCHAR(20) 25> ) 26> GO 1> 2> insert into Bankers values (1, "ABC Inc.","Joe","Smith","Vancouver","BC","11111","111-111-1111"); 3> GO (1 rows affected) 1> insert into Bankers values (2, "DEF Inc.","Red","Rice", "New York", "DE","22222","222-222-2222"); 2> GO (1 rows affected) 1> insert into Bankers values (3, "HJI Inc.","Kit","Cat", "Paris", "CA","33333","333-333-3333"); 2> GO (1 rows affected) 1> insert into Bankers values (4, "QWE Inc.","Git","Black","Regina", "ER","44444","444-444-4444"); 2> GO (1 rows affected) 1> insert into Bankers values (5, "RTY Inc.","Wil","Lee", "Toronto", "YU","55555","555-555-5555"); 2> GO (1 rows affected) 1> insert into Bankers values (6, "YUI Inc.","Ted","Larry","Calgary", "TY","66666","666-666-6666"); 2> GO (1 rows affected) 1> insert into Bankers values (7, "OIP Inc.","Yam","Act", "San Franc","FG","77777","777-777-7777"); 2> GO (1 rows affected) 1> insert into Bankers values (8, "SAD Inc.","Hit","Eat", "Orland", "PO","88888","888-888-8888"); 2> GO (1 rows affected) 1> insert into Bankers values (9, "DFG Inc.","Sad","Lee", "Wisler", "PL","99999","999-999-9999"); 2> GO (1 rows affected) 1> insert into Bankers values (0, "GHJ Inc.","Bit","Lee", "Ticker", "MN","00000","000-000-0000"); 2> GO (1 rows affected) 1> 2> 3> CREATE PROC spBankerState 4> @StateVar varchar(20) 5> AS 6> SELECT BankerName 7> FROM Bankers 8> WHERE BankerState = @StateVar 9> GO 1> 2> --A statement that changes the parameter defined by the procedure 3> 4> ALTER PROC spBankerState 5> @StateVar varchar(20) = NULL 6> AS 7> IF @StateVar IS NULL 8> SELECT BankerName 9> FROM Bankers 10> ELSE 11> SELECT BankerName 12> FROM Bankers 13> WHERE BankerState = @StateVar 14> GO 1> 2> drop PROC spBankerState; 3> GO 1> 2> drop table Bankers; 3> GO 1> 2> 3></source>
