Posted on 2007-05-07 13:42
大大毛 阅读(460)
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看到CSDN上有问的，试着做了一个存储过程来实现它：
问题描述是这样的：例如整型数16646316，表示为16进制形式则是0XOOFEOOAC，最后需要实现高低位互换然后分解成4个字节数据。
输入：
0XOOFEOOAC
结果：
1. OXOO
2. OXFE
3. OXOO
4. OXAC
存储过程实现：
Create Procedure p_SplitByteFromInt
@d int,
@b1 binary(1) output,
@b2 binary(2) output,
@b3 binary(3) output,
@b4 binary(4) output
AS
Declare @t1 smallint,@t2 smallint
Select @t2 = CAST(@d As binary(2)),@t1=CAST(CAST(@d & 0xFFFF0000 As binary(4)) As binary(2))
Set @b1 = CAST(CAST(@t1 & 0xFF00 As binary(2)) As binary(1))
Set @b2 = CAST(@t1 As binary(1))
Set @b3 = CAST(CAST(@t2 & 0xFF00 As binary(2)) As binary(1))
Set @b4 = CAST(@t2 As binary(1))
测试代码：
declare @b1 binary(1),@b2 binary(1),@b3 binary(1),@b4 binary(1)
exec p_SplitByteFromInt 16646316,@b1 output,@b2 output,@b3 output,@b4 output
select @b1,@b2,@b3,@b4