Erste Folge der dynamischen SQL in eine Variable für SQL-Server

Question

Ausführen von dynamischen SQL wie in Stored Procedure folgt:

DECLARE @sqlCommand nvarchar(1000) 
DECLARE @city varchar(75) 
SET @city = 'London' 
SET @sqlCommand = 'SELECT COUNT(*) FROM customers WHERE City = @city' 
EXECUTE sp_executesql @sqlCommand, N'@city nvarchar(75)', @city = @city 

Wie verwende ich den count (*) Spaltenwert als Rückgabewert in der SP?

Answer 1

DECLARE @sqlCommand nvarchar(1000) 
DECLARE @city varchar(75) 
declare @counts int 
SET @city = 'New York' 
SET @sqlCommand = 'SELECT @cnt=COUNT(*) FROM customers WHERE City = @city' 
EXECUTE sp_executesql @sqlCommand, N'@city nvarchar(75),@cnt int OUTPUT', @city = @city, @cnt=@counts OUTPUT 
select @counts as Counts 

Answer 2

Sie haben dies wahrscheinlich versucht, aber sind Ihre Spezifikationen so, dass Sie dies tun können?

DECLARE @city varchar(75) 
DECLARE @count INT 
SET @city = 'London' 
SELECT @count = COUNT(*) FROM customers WHERE City = @city 

Answer 3

DECLARE @sqlCommand nvarchar(1000) 
DECLARE @city varchar(75) 
DECLARE @cnt int 
SET @city = 'London' 
SET @sqlCommand = 'SELECT @cnt=COUNT(*) FROM customers WHERE City = @city' 
EXECUTE sp_executesql @sqlCommand, N'@city nvarchar(75)', @city = @city 
RETURN @cnt 

Answer 4

vMYQUERY := 'SELECT COUNT(*) FROM ALL_OBJECTS WHERE OWNER = UPPER(''MFI_IDBI2LIVE'') AND OBJECT_TYPE = ''TABLE'' 
    AND OBJECT_NAME =''' || vTBL_CLIENT_MASTER || ''''; 
    PRINT_STRING(VMYQUERY); 
    EXECUTE IMMEDIATE vMYQUERY INTO VCOUNTTEMP ; 

Answer 5

dynamische Version

ALTER PROCEDURE [dbo].[ReseedTableIdentityCol](@p_table varchar(max))-- RETURNS int 
    AS 
    BEGIN 
     -- Declare the return variable here 
     DECLARE @sqlCommand nvarchar(1000) 
     DECLARE @maxVal INT 
     set @sqlCommand = 'SELECT @maxVal = ISNULL(max(ID),0)+1 from '+@p_table 
     EXECUTE sp_executesql @sqlCommand, N'@maxVal int OUTPUT',@maxVal=@maxVal OUTPUT 
     DBCC CHECKIDENT(@p_table, RESEED, @maxVal) 
    END 


exec dbo.ReseedTableIdentityCol @p_table='Junk' 

Answer 6

dies eine Lösung sein könnte?

declare @step2cmd nvarchar(200) 
DECLARE @rcount NUMERIC(18,0) 
set @step2cmd = 'select count(*) from uat.ap.ztscm_protocollo' --+ @nometab 
EXECUTE @rcount=sp_executesql @step2cmd 
select @rcount