Question

我必须从表中获取所有记录。我的方法如下：

Private Sub Worksheet_Change(ByVal Target As Range)

  Dim rngDV As Range
  Dim oldVal As String
  Dim newVal As String

  If Target.count > 1 Then GoTo exitHandler

  On Error Resume Next
  Set rngDV = Cells.SpecialCells(xlCellTypeAllValidation)
  On Error GoTo exitHandler
  If rngDV Is Nothing Then GoTo exitHandler
  If Intersect(Target, rngDV) Is Nothing Then

 'Column 7 is the one to which is the code is applied
  ElseIf Target.Column = 7 Then

    Application.EnableEvents = False
    newVal = Target.Value
    Application.Undo
    oldVal = Target.Value
    Target.Value = newVal
    If oldVal = "" Then
    Else
    If newVal = "" Then

    Else
    Target.Value = oldVal _
     & ", " & newVal

    End If
   End If
 End If

exitHandler:
Application.EnableEvents = True
End Sub

目前它正在归还我0.我的日期格式是＆＃34; yyyy-MM-dd HH：mm：ss＆＃34;

请指导我在哪里做错了。谢谢！

Answer 1

或现有代码只需致电cursor.getCount();

total=cursor.getCount();

Cursor.getCount（）;
返回游标中的行数。

<强>已更新
查询以获取两个日期SO - How to select data between two date range in android SQLite

的记录

查询是
SELECT * FROM mytab where my_date BETWEEN '2016-03-01 00:00:00' AND '2016-03-19 00:00:00'

Answer 2

我认为你应该使用COUNT（*）而不是*。

试试这个。

public int getTasksByStatusIDBetweenDates(int statusID, String startDate, String endDate) {

    SQLiteDatabase db = this.getReadableDatabase();
    Cursor cursor = db.rawQuery(
            "select count(*) from Task" +
                    " where StatusID=" + statusID + " and AssignDate between '" + startDate + "' and '" + endDate + "'", null);

    int total = 0;
    if (cursor.moveToFirst())
        total = cursor.getInt(0);

    cursor.close();
    return total;
}

Answer 3

SELECT *的查询将返回表中所有行的所有列。

cursor.getInt(0)返回光标当前行第一列的值。

要计算行数，您可以使用SELECT COUNT(*) ...的查询，并读取其返回的值。或者，使用有用的helper function为您构建查询：

public int getTasksByStatusIDBetweenDates(int statusID, String startDate, String endDate) {
    SQLiteDatabase db = this.getReadableDatabase();
    return DatabaseUtils.queryNumEntries(
            db, "Task",
            "StatusID=" + statusID + " and AssignDate between ? and ?",
            new String[]{ startDate, endDate });
}

日期之间的Android SQLite查询不起作用

3 个答案: