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SQL 实现其他进制到十进制的转换

作者：黑客防线网安SQL维护基地来源：黑客防线网安SQL维护基地浏览次数：0

黑客防线网安网讯： -----二进制转换十进制-----------------select sum(data1)from (select substr(&#39;1101&#39;, rownum, 1) * power(2, length(&#39;1101&#39;) - rownum) data1from dualconnect by ...

-----二进制转换十进制-----------------
select sum(data1)
from (select substr('1101', rownum, 1) * power(2, length('1101') - rownum) data1
from dual
connect by rownum <= length('1101'))

-----八进制转换十进制-----------------
select sum(data1)
from (select substr('1101', rownum, 1) * power(8, length('1101') - rownum) data1
from dual
connect by rownum <= length('1101'))

-----十六进制转换十进制-----------------
select sum(data1)
from (select (CASE upper(substr('2D', rownum, 1))
WHEN 'A' THEN '10'
WHEN 'B' THEN '11'
WHEN 'C' THEN '12'
WHEN 'D' THEN '13'
WHEN 'E' THEN '14'
WHEN 'F' THEN '15'
ELSE substr('2D', rownum, 1)
END) * power(16, length('2D') - rownum) data1
from dual
connect by rownum <= length('2D'))