sql server里将十六进制转换成十进制
在网上找了很多，总是不知道怎么用，于是自己写了一个：
declare @strHex char(5),
@len int,
@intOut int,
@i int,
@charint int
set @strHex = '20'
set @len = len(rtrim(@strHex))
set @i = 1
set @intOut = 0
while @i <= @len
begin
set @charint = case substring(upper(rtrim(ltrim(@strHex))),@i,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(@strHex,@i,1)
end
set @intOut = @intOut +@charint * power(16, @len-@i)
set @i = @i + 1
end
print @intOut
由于要批量修改，帮写成了游标的形式：
use pubs
declare @strHex char(5),
@len int,
@intOut int,
@i int,
@charint int,
@keyname char(50)
declare hextoint cursor for
select rtrim(col001),rtrim(col002) from vv
open hextoint
fetch next from hextoint into @keyname,@strHex
while @@fetch_status =0
begin
set @len = len(rtrim(@strHex))
set @i = 1
set @intOut = 0
while @i <= @len
begin
set @charint = case substring(upper(rtrim(ltrim(@strHex))),@i,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(@strHex,@i,1)
end
set @intOut = @intOut +@charint * power(16, @len-@i)
set @i = @i + 1
end
update vv set col002 = @intout where col001 = rtrim(@keyname)
--print @intOut
fetch next from hextoint into @keyname,@strHex
end
close hextoint
deallocate hextoint
记以下留作以后参考吧。
相关文档：
Truncate Logs for SQL Server 2008
I had previously posted how to Truncate Logs for SQL Server 2005. Unfortunately, this method does not work in SQL Server 2008. The reason is because the “WITH TRUNCATE_ONLY” command is no longer in SQL 2008. Assuming you run in full recovery mode, the n ......
今天测试web项目新建了一个数据库，结果报错,以前登录直接选择'Windows身份验证',并没有什么问题出现!可前段时间采用'SQLSERVER身份验证'去登录,随之的问题就来了.无论用什么方法就是一个结果出错! 出错的原因是:'用户 'sa' 登录失败。该用户与可信 SQL Server 连接无关联'.今天上网上查了半天还是搞不定,最后经过网上和书� ......
1. select top pageSize
* from table where id not in(select top((pageNo-1)*pageSize
) id from table order by id asc)
2. select * from table where id<=pageSize*pageNo
and id>(pageNo-1)*pageSize
order by id asc
注：
pagesize每页显示的记录数
pageNo当前第几页
......
一、什么是SQL注入式攻击?
所谓SQL注入式攻击，就是攻击者把SQL命令插入到Web表单的输入域或页面请求的查询字符串，欺骗服务器执行恶意的SQL命令。在某些表单中，用户输入的内容直接用来构造(或者影响)动态SQL命令，或作为存储过程的输入参数，这类表单特别容易受到SQL注入式攻击。常见的SQL注入式攻击过程类如： ......
