SQL server stored procedure return a table

Question

I have a stored procedure that takes in two parameters. I can execute it successfully in Server Management Studio. It shows me the results which are as I expect. However it also returns a Return Value.

It has added this line,

 SELECT 'Return Value' = @return_value

I would like the stored procedure to return the table it shows me in the results not the return value as I am calling this stored procedure from MATLAB and all it returns is true or false.

Do I need to specify in my stored procedure what it should return? If so how do I specify a table of 4 columns (varchar(10), float, float, float)?

Answer 1

A procedure can't return a table as such. However you can select from a table in a procedure and direct it into a table (or table variable) like this:

create procedure p_x
as
begin
declare @t table(col1 varchar(10), col2 float, col3 float, col4 float)
insert @t values('a', 1,1,1)
insert @t values('b', 2,2,2)

select * from @t
end
go

declare @t table(col1 varchar(10), col2 float, col3 float, col4 float)
insert @t
exec p_x

select * from @t

Answer 2

I do this frequently using Table Types to ensure more consistency and simplify code. You can't technically return "a table", but you can return a result set and using INSERT INTO .. EXEC ... syntax, you can clearly call a PROC and store the results into a table type. In the following example I'm actually passing a table into a PROC along with another param I need to add logic, then I'm effectively "returning a table" and can then work with that as a table variable.

/****** Check if my table type and/or proc exists and drop them ******/
IF EXISTS (SELECT * FROM sys.objects WHERE type = 'P' AND name = 'returnTableTypeData')
DROP PROCEDURE returnTableTypeData
GO
IF EXISTS (SELECT * FROM sys.types WHERE is_table_type = 1 AND name = 'myTableType')
DROP TYPE myTableType
GO

/****** Create the type that I'll pass into the proc and return from it ******/
CREATE TYPE [dbo].[myTableType] AS TABLE(
    [someInt] [int] NULL,
    [somenVarChar] [nvarchar](100) NULL
)
GO

CREATE PROC returnTableTypeData
    @someInputInt INT,
    @myInputTable myTableType READONLY --Must be readonly because
AS
BEGIN

    --Return the subset of data consistent with the type
    SELECT
        *
    FROM
        @myInputTable
    WHERE
        someInt < @someInputInt

END
GO


DECLARE @myInputTableOrig myTableType
DECLARE @myUpdatedTable myTableType

INSERT INTO @myInputTableOrig ( someInt,somenVarChar )
VALUES ( 0, N'Value 0' ), ( 1, N'Value 1' ), ( 2, N'Value 2' )

INSERT INTO @myUpdatedTable EXEC returnTableTypeData @someInputInt=1, @myInputTable=@myInputTableOrig

SELECT * FROM @myUpdatedTable


DROP PROCEDURE returnTableTypeData
GO
DROP TYPE myTableType
GO

Answer 3

Consider creating a function which can return a table and be used in a query.

https://msdn.microsoft.com/en-us/library/ms186755.aspx

The main difference between a function and a procedure is that a function makes no changes to any table. It only returns a value.

In this example I'm creating a query to give me the counts of all the columns in a given table which aren't null or empty.

There are probably many ways to clean this up. But it illustrates a function well.

USE Northwind

CREATE FUNCTION usp_listFields(@schema VARCHAR(50), @table VARCHAR(50))
RETURNS @query TABLE (
    FieldName VARCHAR(255)
    )
BEGIN
    INSERT @query
    SELECT
        'SELECT ''' + @table+'~'+RTRIM(COLUMN_NAME)+'~''+CONVERT(VARCHAR, COUNT(*)) '+
    'FROM '+@schema+'.'+@table+' '+
          ' WHERE isnull("'+RTRIM(COLUMN_NAME)+'",'''')<>'''' UNION'
    FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = @table and TABLE_SCHEMA = @schema
    RETURN
END

Then executing the function with

SELECT * FROM usp_listFields('Employees')

produces a number of rows like:

SELECT 'Employees~EmployeeID~'+CONVERT(VARCHAR, COUNT(*)) FROM dbo.Employees  WHERE isnull("EmployeeID",'')<>'' UNION
SELECT 'Employees~LastName~'+CONVERT(VARCHAR, COUNT(*)) FROM dbo.Employees  WHERE isnull("LastName",'')<>'' UNION
SELECT 'Employees~FirstName~'+CONVERT(VARCHAR, COUNT(*)) FROM dbo.Employees  WHERE isnull("FirstName",'')<>'' UNION

Answer 4

I had a similar situation and solved by using a temp table inside the procedure, with the same fields being returned by the original Stored Procedure:

CREATE PROCEDURE mynewstoredprocedure
AS 
BEGIN

INSERT INTO temptable (field1, field2)
EXEC mystoredprocedure @param1, @param2

select field1, field2 from temptable

-- (mystoredprocedure returns field1, field2)

END

Answer 5

You can use an out parameter instead of the return value if you want both a result set and a return value

CREATE PROCEDURE proc_name 
@param int out
AS
BEGIN
    SET @param = value
SELECT ... FROM [Table] WHERE Condition
END
GO

Answer 6

The Status Value being returned by a Stored Procedure can only be an INT datatype. You cannot return other datatypes in the RETURN statement.

From Lesson 2: Designing Stored Procedures:

Every stored procedure can return an integer value known as the execution status value or return code.

If you still want a table returned from the SP, you'll either have to work the record set returned from a SELECT within the SP or tie into an OUTPUT variable that passes an XML datatype.

HTH,

John

Answer 7

Though this question is very old but as a new in Software Development I can't stop my self to share what I have learnt :D

Creation of Stored Procedure:

CREATE PROC usp_ValidateUSer
(
    @UserName nVARCHAR(50),
    @Password nVARCHAR(50)
)
AS
BEGIN
    IF EXISTS(SELECT '#' FROM Users WHERE Username=@UserName AND Password=@Password)
    BEGIN
        SELECT u.UserId, u.Username, r.UserRole
        FROM Users u
        INNER JOIN UserRoles r
        ON u.UserRoleId=r.UserRoleId
    END
END

Execution of Stored Procedure:

(If you want to test the execution of Stored Procedure in SQL)

EXEC usp_ValidateUSer @UserName='admin', @Password='admin'

The Output:

Answer 8

create procedure PSaleCForms
as
begin
declare 
@b varchar(9),
@c nvarchar(500),
@q nvarchar(max)
declare @T table(FY nvarchar(9),Qtr int,title nvarchar    (max),invoicenumber     nvarchar(max),invoicedate datetime,sp decimal    18,2),grandtotal decimal(18,2))
declare @data cursor
set @data= Cursor
forward_only static
for 
select x.DBTitle,y.CurrentFinancialYear from [Accounts     Manager].dbo.DBManager x inner join [Accounts Manager].dbo.Accounts y on        y.DBID=x.DBID where x.cfy=1
open @data
fetch next from @data
into @c,@b
while @@FETCH_STATUS=0
begin
set @q=N'Select '''+@b+''' [fy], case cast(month(i.invoicedate)/3.1 as int)     when 0 then 4 else cast(month(i.invoicedate)/3.1 as int) end [Qtr],     l.title,i.invoicenumber,i.invoicedate,i.sp,i.grandtotal from     ['+@c+'].dbo.invoicemain i inner join  ['+@c+'].dbo.ledgermain l on     l.ledgerid=i.ledgerid where (sp=0 or stocktype=''x'') and invoicetype=''DS'''

insert into @T exec [master].dbo.sp_executesql @q fetch next from @data into @c,@b end close @data deallocate @data select * from @T return end

Answer 9

Here's an example of a SP that both returns a table and a return value. I don't know if you need the return the "Return Value" and I have no idea about MATLAB and what it requires.

CREATE PROCEDURE test
AS 
BEGIN

    SELECT * FROM sys.databases

    RETURN 27
END

--Use this to test
DECLARE @returnval int

EXEC @returnval = test 

SELECT @returnval