SQL

Question

我有如下查询

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) 列的结果类似于 55.2516494664，我想四舍五入为 55.25

我使用 visual basic.net 2015，我从 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)

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