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sql进制之间的转换
-----二进制转换十进制----------------- select sum(data1) from ( select substring('11011', number, 1)*power(2,len('11011')-number)data1 from (select number from master.dbo.spt_values where type='p')K where number <= len('11011') ) L 结果: 27 -----八进制转换十进制----------------- select sum(data1) from ( select substring('1234567', number, 1)*power(8,len('1234567')-number)data1 from (select number from master.dbo.spt_values where type='p')K where number <= len('1234567') ) L 结果: 342391 -----十六进制转换十进制----------------- select sum(data1) from ( select case upper(substring('4eb7', number, 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 substring('4eb7', number, 1) end* power(16, len('4eb7') - number) data1 from (select number from master.dbo.spt_values where type='p')K where number <= len('4eb7') ) L 结果: 20151 -----十进制转换二进制----------------- declare @i int,@s varchar(10) set @i=27 set @s='' select @s=cast(@i%2 as varchar)+@s,@i=@i/2 from (select number from master.dbo.spt_values where type='p' and number<10 and power(2,number)<@i)K order by number desc select @s 结果: 11011 -----十进制转换八进制----------------- declare @i int,@s varchar(10) set @i=27 set @s='' select @s=cast(@i%8 as varchar)+@s,@i=@i/8 from (select number from master.dbo.spt_values where type='p' and number<10 and power(8,number)<@i)K order by number desc select @s 结果: 33 -----十进制转换十六进制----------------- declare @i int,@s varchar(10) set @i=2379 set @s='' select @s=case when @i%16 between 10 and 15 then char( @i%16+55) else cast(@i%16 as varchar) end +@s,@i=@i/16 from (select number from master.dbo.spt_values where type='p' and number<10 )K order by number desc select @s 结果: 94B
sql进制之间的转换
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