SQL - how to round to 2 decimal places

Question

I have a query as below

Dim DoneAvgCont As New OleDbCommand("select avg(diffpay) ,conrtname from metersdone",con)
Dim DoneAvgContdb As New OleDbDataAdapter(DoneAvgCont)
    Dim DoneAvgContDt As New DataTable

the result of avg(diffpay) column is like 55.2516494664 and I want to round to 55.25

I use visual basic.net 2015 and I get my from access

Answer 1

像这样在第一行编辑您的查询

Dim DoneAvgCont As New OleDbCommand("select round(avg(diffpay),2) ,conrtname from metersdone",con)