SQL Server - General

MSSQL-MS SQL Server Resources.txt

https://www.mssqltips.com/sql-server-tip-category/52/sql-server-management-studio/

MSSQL-Remove-IDENTITY-FromPK.sql

http://dbadailystuff.com/2012/10/14/remove-identity-property-from-a-primary-key-column-in-sql-server


USE [INSTANCE]
GO

SET NOCOUNT ON;

BEGIN TRANSACTION
BEGIN TRY
    -- Adding a new temporary column
    ALTER TABLE [INSTANCE].[dbo].[NotifEntidad]
        ADD [new_EntidadId] INT NULL;

    -- Updating the new column with the values sorted as we want
    EXEC sp_executesql N'UPDATE [INSTANCE].[dbo].[NotifEntidad] SET [new_EntidadId] = [EntidadId]'

    -- Setting the new column as NOT NULL
    ALTER TABLE [INSTANCE].[dbo].[NotifEntidad]
        ALTER COLUMN [new_EntidadId] INT NOT NULL;

    -- Disable Foreign Keys Constraints
	ALTER TABLE [INSTANCE].[dbo].[LU_DemandaEntidad] 
		DROP CONSTRAINT FK_LU_DemandaEntidad_NotifEntidad;

    -- Drop Primary Key
    ALTER TABLE [INSTANCE].[dbo].[NotifEntidad]
    DROP CONSTRAINT [PK_NotifEntidad]

    -- Drop IDENTITY column
    ALTER TABLE [INSTANCE].[dbo].[NotifEntidad]
    DROP COLUMN [EntidadId]

    -- Rename column ID_EXENCION_NEW --> ID_EXENCION
    EXEC sp_rename '[dbo].[NotifEntidad].new_EntidadId', 'EntidadId', 'COLUMN';

    -- Add new Primary Key
    ALTER TABLE [INSTANCE].[dbo].[NotifEntidad]
        ADD CONSTRAINT [PK_NotifEntidad] PRIMARY KEY CLUSTERED ( [EntidadId] ASC )

    -- Enable constraints (without rechecking them)
	ALTER TABLE [INSTANCE].[dbo].[LU_DemandaEntidad] 
		WITH NOCHECK DROP CONSTRAINT FK_LU_DemandaEntidad_NotifEntidad
		FOREIGN KEY (EntidadId) 
		REFERENCES [INSTANCE].dbo.NotifEntidad(EntidadId);

    PRINT 'IDENTITY removed successfully from NotifEntidad'
END TRY

BEGIN CATCH
IF @@TRANCOUNT > 0
    ROLLBACK TRANSACTION;
PRINT 'ERROR:' + ERROR_MESSAGE()
END CATCH;
IF @@TRANCOUNT > 0
    COMMIT TRANSACTION;

MSSQL-ROLLBACK_AUTOMATICALLY_IF_ERROR.sql

SET NOCOUNT ON;

BEGIN TRANSACTION

  BEGIN TRY
   (...DDL and DML SENTENCES like ALTERS, etc., EXEC 'UPDATE...', etc....)
  END TRY

  BEGIN CATCH
  IF @@TRANCOUNT > 0
      ROLLBACK TRANSACTION;
  PRINT 'ERROR:' + ERROR_MESSAGE()
  END CATCH;

IF @@TRANCOUNT > 0
    COMMIT TRANSACTION;