sql存储过程修改实例_sql存储过程语句例解

--创建数据表
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

--添加测试数据
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)

--创建sql存储过程
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

--修改sql存储教程
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