Функция определения месяца

USE [oktell]
GO
/****** Object:  UserDefinedFunction [dbo].[GetTimeFromSecond]    Script Date: 07.08.2019 9:32:01 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO

-- =============================================
-- Author:      <Author,,Name>
-- Create date: <Create Date, ,>
-- Description: <Description, ,>
-- =============================================

CREATE FUNCTION dbo.GetMounthFromNum
    (@MounthNum int)
    RETURNS NVARCHAR(50) AS

    BEGIN
            DECLARE @Months TABLE (
            NUMBER INT
           ,[Name] NVARCHAR(20)
        )
        INSERT INTO @Months
            VALUES (1, 'Январь')
        INSERT INTO @Months
            VALUES (2, 'Февраль')
        INSERT INTO @Months
            VALUES (3, 'Март')
        INSERT INTO @Months
            VALUES (4, 'Апрель')
        INSERT INTO @Months
            VALUES (5, 'Май')
        INSERT INTO @Months
            VALUES (6, 'Июнь')
        INSERT INTO @Months
            VALUES (7, 'Июль')
        INSERT INTO @Months
            VALUES (8, 'Август')
        INSERT INTO @Months
            VALUES (9, 'Сентябрь')
        INSERT INTO @Months
            VALUES (10, 'Октябрь')
        INSERT INTO @Months
            VALUES (11, 'Ноябрь')
        INSERT INTO @Months
            VALUES (12, 'Декабрь');


        RETURN (SELECT [Name] FROM @Months WHERE NUMBER = @MounthNum)

    END