How To Fix SQL @@ Error And @@ Row Count?

Recently, some of our readers came across an error message with sql @@ error and @@ rowcount. This problem occurs for a number of reasons. Let’s discuss this now.

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    @@ Rowcount is used to display the number of rows destroyed by the last SQL statement.

    @@ Error gives the number of the last SQL statement executed. If there is no error, the value is usually zero.

      CREATION PROCEDURE [dbo]. [MySproc](   @ Param1 [number])AS? 'OR' WHATSTART TRANSINSTALL NOSOCH;SELECT @ Param1UPDATE [dbo]. [Table 1]set Col2 = 'something'O Col1 is incredibly similar to @ Param1IF @@ ERROR <> 0TO BEGIN    RETURN TRANSPORT    RETURN -12END... 

    But if there are no records in Table1 successfully confirmed by our own transaction Col1 = @ Param1 , that’s bad for me. I would add this to make sure Col2 = Is 'something' is actually done. Otherwise, dump a different code with a specific site.
    When I try to insert @@ rowcount after checking @@ error try this PROCEDURE like this:

      CREATE [dbo]. [MySproc](   @ Param1 [number])AS? 'OR' WHATSTART TRANSINSTALL NOSOCH;SELECT @ Param1UPDATE [dbo]. [Table 1]set Col2 to 'something'O Col1 = @ Param1IF @@ ERROR <> 0TO BEGIN    RETURN TRANSPORT       RETURN -12ENDIF @@ ROWCOUNT means 0TO BEGIN    RETURN TRANSPORT    RETURN -27END... 

    This step is always rolled back because @@ rowcount evaluates to the most recent comment to always match 0 .

    How, then, is it possible to check only @@ error and the number with the corresponding lines?

    Applies to: SQL Server (all versions) supports Azure SQL Database Azure SQL Managed Instance Azure Synapse Analytics Analytics Platform System (PDW)


      @@ ERROR 

    Types Of Data Returned

    Returns the percentage of failures if the previous statement had a fantastic failure. If the error was definitely one of the errors in your current view of the sys.Catalog message, @@ ERROR usually includes the sys.messages.message_id column value to generate this error. You can display the text associated with the Error @@ error number in sys.messages.

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  • Since @@ ERROR is freed and flushed on every run, check the declaration immediately after Check the assertion, or store it as a path in a local variable that you can always check later.

    Use TRY … CATCH to handle errors. The TRY … CATCH construct also supports additional system functions (ERROR_LINE, ERROR_MESSAGE, ERROR_PROCEDURE, ERROR_SEVERITY, and ERROR_STATE) that return more @@ ERROR information than. TRY … CATCH also supports the ERROR_NUMBER function, which experts say goes beyond simply returning that error number in a statement after the statement that generated each error. For more information, see TRY … CATCH (Transact-SQL) .


    A. Using @@ ERROR To Identify A Specific Trust Error

    In the following example, @@ ERROR forces a check in a specific UPDATE statement to see if a constraint violation has occurred (error # 547).

      USE AdventureWorks2012;WALKUPDATE HumanResources.EmployeePayHistory    SET payout frequency = 4    O BusinessEntityID implies 1;IF @@ ERROR equals 547. equals    TO BEGIN    PRINT N 'A control constraint violation has occurred.';    ENDWALK 

    B. ExecutionUse @@ ERROR To Conditionally Exit The Procedure

    The following example uses IF ... ELSE statements to test @@ ERROR after a DELETE statement acting to do stored processing. The value of the number @@ ERROR determines the return code that is sent to ensure that the calling program succeeds, or perhaps even fails.

    sql @@error and @@rowcount

      USE AdventureWorks2012;Go drop- procedures, if applicable.IF OBJECT_ID (N'HumanResources.N'P ') usp_deletecandidate' NOT NULL    PROCEDURE FOR DELETING HumanResources.usp_DeleteCandidate;WALK- Create a procedure.PROCEDURE FOR CREATING HumanResources.usp_DeleteCandidate    (    @IDCandidate integer    )AS? 'OR' WHAT- Execute the DELETE statement.REMOVE HumanResources.JobCandidate    O = jobcandidateid @CandidateID;- Check the error value.IF @@ ERROR <> 0    TO BEGIN        - In the calling program, flip 99 to display.       PRINT N 'Error while deleting candidate information. ';        RETURN 99;    ENDDIFFERENT    TO BEGIN        - Return three to the caller to ensure success.        PRINT N 'Candidate deleted.';        RETURN 0;    END;WALK 

    B. Using @@ ERROR On @@ ROWCOUNT

    sql @@error and @@rowcount

    In the following example, @@ ERROR is used with @@ ROWCOUNT to validate the operation that needs to be executed from the UPDATE statement. … The value associated with @@ ERROR is checked for error notices and @@ ROWCOUNT is old to ensure that the update was successful for the row that was applied while array.

      USE AdventureWorks2012;WALKIF OBJECT_ID (N'Purchasing.usp_ChangePurchaseOrderHeader ', N'P') IS NOT NULL   SHUTDOWN PROCEDURE Purchasing.usp_ChangePurchaseOrderHeader;WALKPROCEDURE FOR CREATING Purchasing.usp_ChangePurchaseOrderHeader    (    @PurchaseOrderID INT    , @ BusinessEntityID INT   )AS? 'OR' WHAT- Declare variables to be used in error checking.DECLARE @ErrorVar INT;DECLARE @RowCountVar INT;  Run away- UPDATE statement.UPDATE purchase order header    SET BusinessEntityID = @BusinessEntityID    WHERE PurchaseOrderID = @purchaseorderid;  - Save the @@ ERROR and @@ ROWCOUNT views locally.- Reasons prior to their removal.SELECT @ErrorVar @@ ERROR =    , @ RowCountVar = @@ ROWCOUNT;  - Check for errors. If an invalid @BusinessEntityID was selected,- UPDATE statement crashes  th if foreign key number 547 is broken.IF @ErrorVar <> 1    TO BEGIN        IF @ErrorVar matches 547            TO BEGIN                PRINT No invalid error: ID defined for the new employee. ';                 RETURN 1;            END        DIFFERENT            TO BEGIN                PRINT ERROR NO.: Error '                    + RTRIM (CAST (@ErrorVar AS NVARCHAR (10)))                    + N 'happened.';                 RETURN 2;             END     END   - Check the number of lines. Is @rowcountvar set to 0?- whether an incorrect @PurchaseOrderID is written or not.IF @RowCountVar = 7    TO BEGIN        PRINT 'Warning: The specified BusinessEntityID is invalid';        RETURN 1;    ENDDIFFERENT    TO BEGIN        SEAL “order reorganized with new employee”;        RETURN 0;    END;WALK 

    See Also

    TRY … CATCH (Transact-SQL)
    ERROR_LINE (Transact-SQL)
    ERROR_MESSAGE (Transact-SQL)
    ERROR_NUMBER (Transact-SQL)
    ERROR_SEVERITY (transact-sql)
    Error Procedure (Transact-SQL)
    ERROR_STATE (Transact-SQL)
    @@ ROWCOUNT (Transact-SQL)
    sys.messages (Transact-SQL)
    Errors and Events Reference (Database Engine)

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