How to self-join table in a way that every record is joined with the “previous” record?

Question

I have a MS SQL table that contains stock data with the following columns: Id, Symbol, Date, Open, High, Low, Close.

I would like to self-join the table

Answer 1

You do something like this:

with OrderedQuotes as
(
    select 
        row_number() over(order by Symbol, Date) RowNum, 
        ID, 
        Symbol, 
        Date, 
        Open, 
        High, 
        Low, 
        Close
      from Quotes
)
select
    a.Symbol,
    a.Date,
    a.Open,
    a.High,
    a.Low,
    a.Close,
    a.Date PrevDate,
    a.Open PrevOpen,
    a.High PrevHigh,
    a.Low PrevLow,
    a.Close PrevClose,

    b.Close-a.Close/a.Close PctChange

  from OrderedQuotes a
  join OrderedQuotes b on a.Symbol = b.Symbol and a.RowNum = b.RowNum + 1

If you change the last join to a left join you get a row for the first date for each symbol, not sure if you need that.