Subtract 2nd row with first row in table view

Sandeep13 Select your table Sort_Client_MIS.
Create a new column by clicking on "New Column" in the "Modeling" tab.
Use the following DAX formula to create the Visit_cnt column:

DAX
Visit_cnt =
VAR CurrentRow = 'Sort_Client_MIS'[ECV_VISIT]
VAR PreviousRow =
CALCULATE(
MAX('Sort_Client_MIS'[ECV_VISIT]),
FILTER(
'Sort_Client_MIS',
'Sort_Client_MIS'[HIT_FROM] = EARLIER('Sort_Client_MIS'[HIT_FROM]) &&
'Sort_Client_MIS'[ECV_VISIT] < EARLIER('Sort_Client_MIS'[ECV_VISIT])
)
)
RETURN
IF(
ISBLANK(PreviousRow),
CurrentRow,
CurrentRow - PreviousRow
)