CREATE TABLE [dbo].[fds__invoice_file_backups] (
    [uid]          BIGINT          IDENTITY (1, 1) NOT NULL,
    [InvoiceId]    VARCHAR (10)    NOT NULL,
    [DocumentName] VARCHAR (50)    NULL,
    [file]         VARBINARY (MAX) NOT NULL,
    -- JSON snapshots (FOR JSON PATH) of the invoice's data rows at backup time, so the file and
    -- the data it was rendered from stay together as one consistent set (ADR 0030).
    -- InvoiceJson: the fds__invoices row without [file]; InvoiceItemsJson: array of
    -- fds__invoice_items rows; InvoiceDetailsJson: the fds__invoice_details row (NULL if none);
    -- InvoiceServiceRequestsJson: array of fds__invoice_servicerequests rows.
    [InvoiceJson]                NVARCHAR (MAX) NULL,
    [InvoiceItemsJson]           NVARCHAR (MAX) NULL,
    [InvoiceDetailsJson]         NVARCHAR (MAX) NULL,
    [InvoiceServiceRequestsJson] NVARCHAR (MAX) NULL,
    [BackedUpAt]   DATETIME        CONSTRAINT [DF_fds__invoice_file_backups_BackedUpAt] DEFAULT (getutcdate()) NOT NULL,
    [BackedUpBy]   VARCHAR (25)    NULL,
    CONSTRAINT [PK_fds__invoice_file_backups] PRIMARY KEY CLUSTERED ([uid] ASC)
);

GO
CREATE NONCLUSTERED INDEX [fds__invoice_file_backups__ix1]
    ON [dbo].[fds__invoice_file_backups]([InvoiceId] ASC);