关于在SQL的select查询结果中加入自定义字符的问题？

有的时候，我们有需要将由不同栏位获得的资料串连在一起。每一种资料库都有提供方法来达到这个目的：

MySQL: CONCAT()

Oracle: CONCAT(), ||

SQL Server: +

CONCAT() 的语法如下：

CONCAT(字串1, 字串2, 字串3, ...): 将字串1、字串2、字串3，等字串连在一起。请注意，Oracle的CONCAT()只允许两个参数；换言之，一次只能将两个字串串连起来。不过，在Oracle中，我们可以用'||'来一次串连多个字串。

来看几个例子。假设我们有以下的表格：

Geography 表格 region_name store_name

East Boston

East New York

West Los Angeles

West San Diego

例子1:

MySQL/Oracle:

SELECT CONCAT(region_name,store_name) FROM Geography

WHERE store_name = 'Boston'

结果：

'EastBoston'

例子2:

Oracle:

SELECT region_name || ' ' || store_name FROM Geography

WHERE store_name = 'Boston'

结果：

'East Boston'

例子3:

SQL Server:

SELECT region_name + ' ' + store_name FROM Geography

WHERE store_name = 'Boston'

可以实现的

在SQL建

如下：

SQL取汉字拼音首字母

create proc pinyin @var varchar(100)

as

begin

set @var=ltrim(rtrim(@var))

declare @i int,@v varbinary(2),@varchar varchar(100),@pinyin varchar(100)

set @pinyin=''

set @i=1

while @i<=len(@var)

begin

set @v=cast(substring(@var,@i,1) as varbinary)

if @v<0xB0A1 or @v>0xD7FD

begin

print '含有非法字符'

return

end

if @v>=0xB0A1 and @v<=0xB0C4

begin

set @varchar='A'

end

else if @v>=0xB0C5 and @v<=0xB2C0

begin

set @varchar='B'

end

else if @v>=0xB2C1 and @v<=0xB2C0

begin

set @varchar='C'

end

else if @v>=0xB4EE and @v<=0xB6E9

begin

set @varchar='D'

end

else if @v>=0xB6EA and @v<=0xB7A1

begin

set @varchar='E'

end

else if @v>=0xB7A2 and @v<=0xB8C0

begin

set @varchar='F'

end

else if @v>=0xB8C1 and @v<=0xB9FD

begin

set @varchar='G'

end

else if @v>=0xB9EE and @v<=0xBBF6

begin

set @varchar='H'

end

else if @v>=0xBBF7 and @v<=0xBFA5

begin

set @varchar='J'

end

else if @v>=0xBFA6 and @v<=0xC0AB

begin

set @varchar='K'

end

else if @v>=0xC0AC and @v<=0xC2E7

begin

set @varchar='L'

end

else if @v>=0xC2E8 and @v<=0xC4C2

begin

set @varchar='M'

end

else if @v>=0xC4C3 and @v<=0xC5B5

begin

set @varchar='N'

end

else if @v>=0xC5B6 and @v<=0xC5BD

begin

set @varchar='O'

end

else if @v>=0xC5BE and @v<=0xC6D9

begin

set @varchar='P'

end

else if @v>=0xC6DA and @v<=0xC8BA

begin

set @varchar='Q'

end

else if @v>=0xC8BB and @v<=0xC8F5

begin

set @varchar='R'

end

else if @v>=0xC8F6 and @v<=0xCBF9

begin

set @varchar='S'

end

else if @v>=0xCBFA and @v<=0xCDD9

begin

set @varchar='T'

end

else if @v>=0xCDDA and @v<=0xCEF3

begin

set @varchar='W'

end

else if @v>=0xCEF4 and @v<=0xD1B8

begin

set @varchar='X'

end

else if @v>=0xD1B9 and @v<=0xD4D0

begin

set @varchar='Y'

end

else if @v>=0xD4D1 and @v<=0xD7FD

begin

set @varchar='Z'

end

else

begin

print 'error'

return

end

set @pinyin=@pinyin+@varchar

set @i=@i+1

end

print @pinyin

end

--drop proc pinyin

exec pinyin '中国人'

组织这样一个 字符串还不如 组织一个 List<ListItem> 遍历这个添加不是更容易？

如果你非要用上面的字符串的话

个人建议可以这样组织var str="张三,1；李四,2；王五,3 "

第一次按“；”号切，第二次按“，”号切！

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