Add Sequence Number to an Existing Table in MS Access

Add series number to an existing table can be done by following method:

SELECT t.myDate, (
    SELECT Count(*)
    FROM myTable AS s
    WHERE t.myDate <= s.myDate) as myRank
FROM myTable AS t

However, if it does not work for you, try following option:

Alter Table Temp_SequenceChange Add Column SequenceNo AutoIncrement;