javascript - 有正则高手吗？ 帮忙解决一下这个问题

问题描述

问 题

现在有一条sql语句

select ID as id,Name as name,IP as ip,lat,lon,0 as type from trk.devs_v2 where type=0 union all select id,signalName as name,ip,lat,lng as lon,99 as type from yc_signal.signal union all

想使用正则让最后一个union all去掉 而不是去掉所有的union all

想要的结果为
select ID as id,Name as name,IP as ip,lat,lon,0 as type from trk.devs_v2 where type=0 union all select id,signalName as name,ip,lat,lng as lon,99 as type from yc_signal.signal

有正则大神帮帮忙呗! 万分感谢

解决方案

let str = "union albdfdfdfunion alaadunion al";
let reg = str.replace(/(union al)$/,'');
console.log(reg)

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