set @str = '12345'; set @len = LENGTH(@str); -- select @len; set @mo = mod(@len,2); -- select @mo set @result = SUBSTRING(@str,floor(if(@mo=1,(@len+1)/2,@len/2)),if(@mo=1,1,2)); set @len2 = LENGTH(@result); -- select ((cast(SUBSTRING(@result,1,1) as SIGNED INTEGER) )+cast(SUBSTRING(@result,2,1) as SIGNED INTEGER))/2; set @result2 = if(@len2=1,@result,((cast(SUBSTRING(@result,1,1) as SIGNED INTEGER) )+cast(SUBSTRING(@result,2,1) as SIGNED INTEGER))/2); -- select @ind select @result2;
MySQL求中位数
-- 只适用于每个数字只有1位的情况
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转载自pepple.iteye.com/blog/2236823
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