如何筛选出一个单元格中只有1和2的值留下除去1和2的所有值
看不明白,筛选后2,2,3,3不该被留下吗
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select * from temp where len(replace(replace(replace(a,',',''),'1',''),'2',''))>0 or(len(replace(replace(a,',',''),'1',''))=0 or len(replace(replace(a,',',''),'2',''))=0)