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第一种: select sum(decode(count1,null,0,count1) +decode(count2,null,0,count2) +decode(count3,null,0,count3)) a from test_table 第二种: select sum (case when count1 is not null then count1 when count2 is not null then count2 when count3 is not null then cou…
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Oracle一列的多行数据拼成一行显示字符   oracle 提供了两个函数WMSYS.WM_CONCAT 和 ListAgg函数.    www.2cto.com   先介绍:WMSYS.WM_CONCAT 例:         id  name         1   aa         2   bb         3   cc   要的结果是"aa,bb,cc"   select WMSYS.WM_CONCAT(a.name) from user a 这样的话,查询出的结果:…
列求和 var m = 0; $('#tb tr').each(function () { //td:eq(3)从0开始计数 $(this).find('td:eq(3)').each(function () { m += parseFloat($(this).text()); }); });…
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对文件某列求和: -F,用,号分隔,求第3行的和 awk -F,  '{sum += $3};END {print sum}' test…
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<html> <head> <title>多列求和</title> <script type="text/javascript"> function addAll(){ var total_value=0; for(i=0;i<document.myform.check.length;i++){ if(document.myform.check[i].checked){ total_value+= parseInt( d…
//表格列求和 <el-table :summary-method="getSummaries" show-summary></el-table> getSummaries (param) {const { columns, data } = param const sums = [] columns.forEach((column, index) => { ) { sums[index] = '合计' return } ) { sums[index] =…