SQL - 如何舍入到2位小数

Question

我的查询如下

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

avg（diffpay）列的结果如55.2516494664，我想要舍入到55.25

我使用visual basic.net 2015，我从访问

获取

Answer 1

在第一行编辑您的查询，如下所示

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