{"id":409,"date":"2023-01-11T11:46:36","date_gmt":"2023-01-11T03:46:36","guid":{"rendered":"https:\/\/www.keioi.cn\/?p=409"},"modified":"2023-01-11T11:46:36","modified_gmt":"2023-01-11T03:46:36","slug":"sql%e5%87%bd%e6%95%b0%e6%88%aa%e5%8f%96%e5%bc%80%e5%a7%8b%e4%bb%8e%e6%9f%90%e5%85%b3%e9%94%ae%e5%ad%97%e7%bb%93%e6%9d%9f%e7%ac%a6%e4%b8%ba%e6%9c%89%e7%9b%b8%e5%90%8c%e5%a4%9a%e4%b8%aa%e7%9a%84","status":"publish","type":"post","link":"https:\/\/www.keioi.cn\/archives\/409","title":{"rendered":"SQL\u51fd\u6570\u622a\u53d6\u5f00\u59cb\u4ece\u67d0\u5173\u952e\u5b57\u7ed3\u675f\u7b26\u4e3a\u6709\u76f8\u540c\u591a\u4e2a\u7684\u67d0\u4e2a"},"content":{"rendered":"\n

\u5de5\u4f5c\u9047\u5230\u8981\u622a\u53d6\u5b57\u7b26\u4e32\u4ece\u67d0\u5173\u952e\u5b57\u5f00\u59cb\u7ed3\u675f\u7b26\u4e3a\u6709\u76f8\u540c\u591a\u4e2a\u7684\u67d0\u4e2a<\/p>\n\n\n\n

\u6bd4\u5982\u5b57\u7b26\u4e32\uff1a\u524d\u9762\u5176\u4ed6\u7684\uff1b\u8bf4\u660e:ZEN,30V,5%,0.2,SE,M,T<\/p>\n\n\n\n

create FUNCTION [dbo].[fn_Get_CmemoCut]
(
@cmemo VARCHAR(max),–\u539f\u5b57\u7b26\u4e32
@key VARCHAR(50), –\u5f00\u59cb\u5173\u952e\u5b57
@delim VARCHAR(20), –\u7ed3\u675f\u7b26
@count int –\u5728\u7b2c\u51e0\u4e2a\u7ed3\u675f\u7b26\u622a
)
RETURNS VARCHAR(max)
AS
BEGIN
declare @p int=0 –\u4f4d\u7f6e
declare @n int=0 –\u8ba1\u6570
declare @f BIT=1
declare @returnstr varchar(max)=”
if charindex(@key,@cmemo)=0 return @returnstr
if @count>0
begin
if charindex(@key,@cmemo)>0
begin
set @cmemo=substring(@cmemo,charindex(@key,@cmemo),len(@cmemo))
end
end<\/p>\n\n\n\n

while @f=1\nbegin\n if charindex(@delim,@cmemo,@p+1)>1\n  begin\n   if @n=@count\n     begin\n     set  @returnstr=substring(@cmemo,1,@p)\n     end\n  set @n=@n+1\n  set @p=charindex(@delim,@cmemo,@p+1)\n  end\n else\n  begin\n  set @f=0\n  end\nend\nif @returnstr<>''\n begin\n set @returnstr=REPLACE(left(@returnstr,LEN(@returnstr)-1),@key,'')\n end\nreturn @returnstr<\/code><\/pre>\n\n\n\n
END<\/p>\n\n\n\n
\u8fd0\u884c\u7ed3\u679c\u5982\u56fe\uff1a<\/p>\n\n\n\n
\"\"<\/figure>\n","protected":false},"excerpt":{"rendered":"
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