select xx as 矿名,xx1 as 传感器,cast(MAX(a.RTData) as numeric(4,2)) AS 最大值 from book <p class="indent">
k=rs.getMetaData().getColumnCount(); System.out.println(k); for(int iii=0;iii<=k;iii++){ Vector tempList = new Vector(); String www=rs.getString(iii); } <p class="indent">
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