SQL Server使用 LEFT JOIN ON LIKE进行数据关联查询

这是来新公司写的第一篇文章，使用LEFT JOIN ON LIKE处理一下这种问题：

SQL视图代码如下：

CREATE View [dbo].[VI_SearchCN] AS
--搜索产品的文件
(
select upload.FileId as ID,upload.Name as Title,upload.Name as FileTxt,con.TypeId as TypeId,upload.Path as DownLoadPath, '文件' as SearchType,'' as CategoryId,'' as ParentCategoryId,upload.Sort,upload.CreateDate from Whir_Ext_Upload upload
left join
Whir_U_Content con
on  ('*'+con.FileDownload+'*') like ('%*'+upload.Path+'*%')
where con.FileDownload!='' and con.IsDel=0 and con.TypeId=2
)
UNION ALL
--搜索产品
(
select con.Whir_U_Content_PId as ID,con.Title, '' as FileTxt, con.TypeId,'' as DownLoadPath,'产品' as SearchType,CategoryId,cat.ParentId as ParentCategoryId,con.Sort,con.CreateDate from Whir_U_Content Con
LEFT JOIN
Whir_U_Content_Category Cat
ON Cat.Whir_U_Content_Category_PId=con.CategoryId
 where con.TypeId=2 and con.IsDel=0
)
UNION ALL
--新闻
select Whir_U_Content_PId as ID,Title,'' as FileTxt,TypeId,'' as DownLoadPath,'新闻' as SearchType,'' as CategoryId,'' as ParentCategoryId,Sort,CreateDate from Whir_U_Content where TypeId IN (13,14,15) and IsDel=0
UNION ALL
(
--文件下载COA
--select Whir_U_Content_PId as ID,Title,TypeId,'' as DownLoadPath,'COA' as SearchType,Sort,CreateDate from Whir_U_Content where TypeId=35 and IsDel=0
select upload.FileId as ID,con.Title,upload.Name as FileTxt,con.TypeId as TypeId,upload.Path as DownLoadPath, 'COA' as SearchType,'' as CategoryId,'' as ParentCategoryId,con.Sort,con.CreateDate from Whir_Ext_Upload upload
left join
Whir_U_Content con
on  ('*'+con.FileDownload+'*') like ('%*'+upload.Path+'*%')
where con.FileDownload!='' and con.IsDel=0 and con.TypeId=35
)

GO

前端代码如下：

 <wtl:list ID="mylist1" needpage="true" sql="select ID,Title,Filetxt,TypeId,DownLoadPath,SearchType,CategoryId,ParentCategoryId,CreateDate from VI_SearchCN where Title LIKE '%{0}%' order by Sort desc,CreateDate desc" sql0="{@key,false}">
                    <wtl:if testtype="{$SearchType}" TestOperate="IN" testvalue="文件,COA">
                        <successTemplate>
                            <dd>
                                <a href="{$uploadpath}{$DownLoadPath,parent,1}" download="{$Title,parent,1}">
                                    <span title="{$Title,70,parent,1}">【{$SearchType,parent,1}】{$Title,70,parent,1}</span>
                                    <time>{$CreateDate,yyyy.MM.dd,parent,1}</time>
                                </a>
                            </dd>
                        </successTemplate>
                    </wtl:if>
                    <wtl:if testtype="{$SearchType}" TestOperate="Equals" testvalue="新闻">
                        <successTemplate>
                            <dd>
                                <a href="{$syspath}news/info_{$TypeId,parent,1}.aspx?itemid={$ID,parent,1}">
                                    <span title="{$Title,70,parent,1}">【{$SearchType,parent,1}】{$Title,70,parent,1}</span>
                                    <time>{$CreateDate,yyyy.MM.dd,parent,1}</time>
                                </a>
                            </dd>
                        </successTemplate>
                    </wtl:if>
                    <wtl:if testtype="{$SearchType}" TestOperate="Equals" testvalue="产品">
                        <successTemplate>
                            <dd>
                                <a href="{$syspath}cpzx/info_{$TypeId,parent,1}.aspx?itemid={$ID,parent,1}&lcid={$CategoryId,parent,1}&bcid={$ParentCategoryId,parent,1}">
                                    <span title="{$Title,70,parent,1}">【{$SearchType,parent,1}】{$Title,70,parent,1}</span>
                                    <time>{$CreateDate,yyyy.MM.dd,parent,1}</time>
                                </a>
                            </dd>
                        </successTemplate>
                    </wtl:if>
                </wtl:list>