Question

我正在尝试比较同一个表中的两个字段，字段名称是＆＃39; start＆＃39;并且＆＃39;结束＆＃39;。对于开始和结束字段，我存储了值00到23。例如

----------------
| start|end|name
===============
 00     00   a
 01     01   b
 02     02   b
 03     03   w
 .      .
 .       .
 23     23   v

所以我要看的是我需要比较开始和结束字段并选择相应的名称。

例如，

如果客户选择start为01并结束为10，那么我需要在这些值之间列出所有名称。

如何在MySQL Query中执行此操作？

Answer 1

也许我并不理解这么好，但听起来应该尝试这样的事情

SELECT name FROM your_table WHERE( start >= RANGE1 AND end <= RANGE2)

Answer 2

This will do it

Private Sub setBarco()
        Dim numeroRandom As New System.Random()
        Dim indiceA, indiceB As Integer
        For b = 1 To barcos
            Randomize()
            Dim value As Integer = CInt(Int((2 * Rnd() + 1)))
            indiceA = numeroRandom.Next(0, filas)
            indiceB = numeroRandom.Next(0, columnas)
            Select Case b
                Case 1
                    If arrayDeCeldas(indiceA, indiceB) = 0 Then
                        arrayDeCeldas(indiceA, indiceB) = b & 1

                    End If
                Case 2
                    Select Case value
                        Case 1
                            For c = 0 To 1
                                If indiceB + c < columnas Then
                                    If arrayDeCeldas(indiceA, indiceB + c) = 0 Then
                                        arrayDeCeldas(indiceA, indiceB + c) = b & c

                                    End If
                                Else
                                    If arrayDeCeldas(indiceA, indiceB - c) = 0 Then
                                        arrayDeCeldas(indiceA, indiceB - c) = b & c

                                    End If
                                End If
                            Next
                        Case 2

                            For c = 0 To 1
                                If indiceA + c < filas Then
                                    If arrayDeCeldas(indiceA + c, indiceB) = 0 Then
                                        arrayDeCeldas(indiceA + c, indiceB) = b & c

                                    Else

                                    End If
                                Else

                                End If
                            Next
                    End Select
                Case 3
                Case 4
                Case 5
                Case 6
            End Select
        Next b
    End Sub

http://sqlfiddle.com/#!9/f70bb/4

我如何比较mySQL中的两个字段并返回结果

2 个答案: