🔹 Accumulations Concept

Accumulations is a process for:
➡️ adding up the values ​​incrementally (running total) of two or more fields in a data stream.

So each record will carry the accumulated results of the previous record.

🔹 Parameter

• Accumulated Field
  Field whose accumulation will be calculated (for example: views,likes).

🔹 Input & Output

• Input Field
  All original fields of the data
• Output Field
  • All input fields
  • new field:accumulation

🔹 How it works

For example, there is input data:

    id	views   likes
    ----------------
    1	10      9
    2	20      6
    3	5       3
    4	15      10

If we use Accumulator on the field views , then the result is:

    id	views   likes       accum_views     accum_likes
    ----------------------------------------------------
    1	10      9           10              9          
    2	20      6           30              15
    3	5       3           35              18
    4	15      10          50              28