J'apprends SQL à partir d'un livre et j'essaie d'écrire une procédure stockée mais je ne crois pas l'avoir fait correctement. La manière suivante n'est-elle pas valide dans Microsoft SQL? Si non, quand est-il valable, si jamais?
create procedure dept_count(in dept_name varchar(20), out d_count integer)
begin
select count(*) into d_count
from instructor
where instructor.dept_name=dept_count.dept_name
end
Je reçois l'erreur suivante
Msg 156, Niveau 15, Etat 1, Procédure wine_change, Ligne 1 Syntaxe incorrecte près du mot clé 'in'.
T-SQL
/*
Stored Procedure GetstudentnameInOutputVariable is modified to collect the
email address of the student with the help of the Alert Keyword
*/
CREATE PROCEDURE GetstudentnameInOutputVariable
(
@studentid INT, --Input parameter , Studentid of the student
@studentname VARCHAR (200) OUT, -- Output parameter to collect the student name
@StudentEmail VARCHAR (200)OUT -- Output Parameter to collect the student email
)
AS
BEGIN
SELECT @studentname= Firstname+' '+Lastname,
@StudentEmail=email FROM tbl_Students WHERE studentid=@studentid
END
Dans les procédures stockées T-SQL pour les paramètres d'entrée, le mot clé 'in' n'est pas requis et pour les paramètres de sortie, un mot clé 'Sortie' explicite est requis. La requête en question peut être écrite comme suit:
CREATE PROCEDURE dept_count
(
-- Add input and output parameters for the stored procedure here
@dept_name varchar(20), --Input parameter
@d_count int OUTPUT -- Output parameter declared with the help of OUTPUT/OUT keyword
)
AS
BEGIN
-- SET NOCOUNT ON added to prevent extra result sets from
-- interfering with SELECT statements.
SET NOCOUNT ON;
-- Statements for procedure here
SELECT @d_count = count(*)
from instructor
where instructor.dept_name=@dept_name
END
GO
et pour exécuter la procédure ci-dessus, nous pouvons écrire en tant que:
Declare @dept_name varchar(20), -- Declaring the variable to collect the dept_name
@d_count int -- Declaring the variable to collect the d_count
SET @dept_name = 'Test'
Execute dept_count @dept_name,@d_count output
SELECT @d_count -- "Select" Statement is used to show the output
Je pense que cela peut vous aider:
CREATE PROCEDURE DEPT_COUNT
(
@DEPT_NAME VARCHAR(20), -- Input parameter
@D_COUNT INT OUTPUT -- Output parameter
-- Remember parameters begin with "@"
)
AS -- You miss this Word in your example
BEGIN
SELECT COUNT(*)
INTO #D_COUNT -- Into a Temp Table (prefix "#")
FROM INSTRUCTOR
WHERE INSTRUCTOR.DEPT_NAME = DEPT_COUNT.DEPT_NAME
END
Ensuite, vous pouvez appeler le SP comme suit:
DECLARE @COUNTER INT
EXEC DEPT_COUNT 'DeptName', @COUNTER OUTPUT
SELECT @COUNTER
Essaye ça:
create procedure dept_count(@dept_name varchar(20),@d_count int)
begin
set @d_count=(select count(*)
from instructor
where instructor.dept_name=dept_count.dept_name)
Select @d_count as count
end
Ou
create procedure dept_count(@dept_name varchar(20))
begin
select count(*)
from instructor
where instructor.dept_name=dept_count.dept_name
end
CREATE PROCEDURE [dbo].[USP_StudentInformation]
@S_Name VARCHAR(50)
,@S_Address VARCHAR(500)
AS
BEGIN
SET NOCOUNT ON;
DECLARE @Date VARCHAR(50)
SET @Date = GETDATE()
IF EXISTS (
SELECT *
FROM TB_StdFunction
WHERE S_Name = @S_Name
AND S_Address = @S_Address
)
BEGIN
UPDATE TB_StdFunction
SET S_Name = @S_Name
,S_Address = @S_Address
,ModifiedDate = @Date
WHERE S_Name = @S_Name
AND S_Address = @S_Address
SELECT *
FROM TB_StdFunction
END
ELSE
BEGIN
INSERT INTO TB_StdFunction (
S_Name
,S_Address
,CreatedDate
)
VALUES (
@S_Name
,@S_Address
,@date
)
SELECT *
FROM TB_StdFunction
END
END
Table Name : TB_StdFunction
S_No INT PRIMARY KEY AUTO_INCREMENT
S_Name nvarchar(50)
S_Address nvarchar(500)
CreatedDate nvarchar(50)
ModifiedDate nvarchar(50)
Créez de cette façon.
Create procedure dept_count(dept_name varchar(20),d_count integer)
begin
select count(*) into d_count
from instructor
where instructor.dept_name=dept_count.dept_name
end
essaye ça:
create procedure dept_count( @dept_name varchar(20), @d_count INTEGER out)
AS
begin
select count(*) into d_count
from instructor
where instructor.dept_name=dept_count.dept_name
end