Question

有人可以帮助我理解如何使我的后续查询（包括子查询和别名）正常工作。

理想情况下，我不希望Cardinal成为结果中的一列，但能够对其进行过滤。

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    <div class="container-fluid">
      <div class="row ticket-summary-navbar">
        <div class="col d-flex justify-content-end">
...

Answer 1

我猜您想将最后一个Snapshotdate作为SnapshotId？

- (void)awakeFromNib {
    [super awakeFromNib];
    // Initialization code

    self.datePickerStart = [[UIDatePicker alloc] init];
    self.datePickerStart.datePickerMode = UIDatePickerModeDateAndTime;
    //self.datePickerStart.date = self.activity.startdt;
    [self.datePickerStart addTarget:self action:@selector(datePickerStartValueChanged:) forControlEvents:UIControlEventValueChanged]; // method to respond to changes in the picker value

    self.datePickerEnd = [[UIDatePicker alloc] init];
    self.datePickerEnd.datePickerMode = UIDatePickerModeDateAndTime;
    //self.datePickerEnd.date = self.activity.enddt;
    [self.datePickerEnd addTarget:self action:@selector(datePickerEndValueChanged:) forControlEvents:UIControlEventValueChanged]; // method to respond to changes in the picker value

    self.datePickerToolbar=[[UIToolbar alloc]initWithFrame:CGRectMake(0, 0, self.bounds.size.width, 44)];
    [self.datePickerToolbar setTintColor:[UIColor grayColor]];
    UIBarButtonItem *doneBtn=[[UIBarButtonItem alloc]initWithTitle:@"Done" style:UIBarButtonItemStylePlain target:self action:@selector(dismissPicker:)];
    UIBarButtonItem *space=[[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];
    [self.datePickerToolbar setItems:[NSArray arrayWithObjects:space,doneBtn, nil]];

    self.TextFieldStartDt.delegate = self;
    self.TextFieldStartDt.inputView = self.datePickerStart;
    self.TextFieldStartDt.inputAccessoryView = self.datePickerToolbar;

    self.TextFieldEndDt.delegate = self;
    self.TextFieldEndDt.inputView = self.datePickerEnd;
    self.TextFieldEndDt.inputAccessoryView = self.datePickerToolbar;
}

SQL语句-使用别名支持

1 个答案: