Question

我有以下代码用于在文档标题中搜索多个关键字，这些代码可以正常工作。我现在想要一个列，显示每个标题行中的关键字数量和以后代方式排序。例如，如果我正在寻找“产假”，我应该得到这样的东西：

名称 - 找到关键字

产假政策 - 2

年假政策 - 1

准妈妈的产妇建议 - 1

希望有道理，非常感谢！

    Dim s As String = TextBox1.Text

    Dim SqlQuery As String = "SELECT Doc_LibraryTable.DocID, Doc_LibraryTable.DocName, Doc_LibraryTable.DocType WHERE Doc_LibraryTable.DocType = DocType"

    Dim ints As String() = s.Split(" ")
    Dim i As Integer 

    If UBound(ints) >= 1 Then
        SqlQuery += " AND (Doc_LibraryTable.DocName LIKE '%" + ints(0) + "%'"       

        For i = 1 To UBound(ints)
            If Not ints(i) = "of" And Not ints(i) = "the" And Not ints(i) = "in" And Not ints(i) = "or" Then
                SqlQuery += " OR Doc_LibraryTable.DocName LIKE '%"
                SqlQuery += ints(i) + "%'"
            End If
        Next



    ElseIf UBound(ints) < 1 Then
       For i = 0 To UBound(ints)
            SqlQuery += " AND (Doc_LibraryTable.DocName LIKE '%"
            SqlQuery += ints(i) + "%"
        Next

   End If

     If UBound(ints) >= 1 Then
        SqlQuery += ")"
    ElseIf UBound(ints) < 1 Then
        SqlQuery += "')"
    End If

    SqlDataSource2.SelectCommand = SqlQuery
    GridView1.DataSource = SqlDataSource2

Answer 1

您可以在循环中使用CASE语句修改SELECT子句，例如：

Dim SqlQuery As String = "SELECT Doc_LibraryTable.DocID, Doc_LibraryTable.DocName, Doc_LibraryTable.DocType, "
Dim sep as String = ""
For i = 0 To UBound(ints)
    SqlQuery += sep + "CASE WHEN Doc_LibraryTable.DocName LIKE '%" + ints(i) + "%' THEN 1 ELSE 0 END"
    sep = " + "
Next
SqlQuery += " as MatchCount WHERE Doc_LibraryTable.DocType = DocType"

Answer 2

另一种有点混乱的方法是做类似

的事情

select ...   
 , len(replace([DocName],'Maternity leave','Maternity leave' + '*')) - len([DocName])
  As NameHits

我使用以下代码来测试： -

set nocount on;
declare @t as table([name] varchar(10))
insert into @t values ('a bb c')
insert into @t values ('aa bc c')

declare @find varchar(5)
set @find = 'bc'

select
    *, 
    len(replace([name],@find,@find + '*')) - len(name)

from @t

按找到的关键字数量对表格进行排序

2 个答案: