如何在sqlplus 12c中的表中获取列名

Question

我正在执行以下命令，并显示以下结果：

class ViewController: UIViewController {

    @IBOutlet weak var segmentedControl: UISegmentedControl!
    @IBOutlet weak var textSegmentedControl: UISegmentedControl!
    @IBOutlet weak var translationSegmentedControl: UISegmentedControl!
    @IBOutlet weak var firstLangText: UITextView!
    @IBOutlet weak var secondLangText: UITextView!
    @IBOutlet weak var thirdLangText: UITextView!
    @IBOutlet weak var translationA: UITextView!
    @IBOutlet weak var translationB: UITextView!
    @IBOutlet weak var translationC: UITextView!
    @IBOutlet weak var textInfo: UITextView!

    override func viewDidLoad() {
        super.viewDidLoad()

        style(control: segmentedControl)

        segmentedControl.addTarget(self, action: #selector(updateMainSegmentedControl), for: .valueChanged)
        textSegmentedControl.addTarget(self, action: #selector(updateTextSegmentedControl), for: .valueChanged)
        translationSegmentedControl.addTarget(self, action: #selector(updateTranslationSegmentedControl), for: .valueChanged)

        secondLangText.isHidden = true
        thirdLangText.isHidden = true
        translationSegmentedControl.isHidden = true
        translationA.isHidden = true
        translationB.isHidden = true
        translationC.isHidden = true
}

    //Mark: Stye SegmentControls & underlineBar
    func style(control: UISegmentedControl) {
        control.backgroundColor = .clear
        control.tintColor = .clear
        control.setTitleTextAttributes([NSAttributedStringKey.font : UIFont.systemFont(ofSize: 16), NSAttributedStringKey.foregroundColor: UIColor.secondaryColor], for: .normal)
        control.setTitleTextAttributes([NSAttributedStringKey.font : UIFont.systemFont(ofSize: 16),NSAttributedStringKey.foregroundColor: UIColor.primaryColor], for: .selected)
    }

    @IBAction func textOrTranslationChange(_ sender: UISegmentedControl) {
        switch segmentedControl.selectedSegmentIndex {
        case 0:
            textSegmentedControl.isHidden = false
            translationSegmentedControl.isHidden = true
            translationUnderlineBar.isHidden = true
            firstLangText.isHidden = false
            translationA.isHidden = true
            textInfo.isHidden = true
        case 1:
            textSegmentedControl.isHidden = true
            translationSegmentedControl.isHidden = false
            firstLangText.isHidden = true
            translationA.isHidden = false
            textInfo.isHidden = true
        case 2:
            textSegmentedControl.isHidden = true
            translationSegmentedControl.isHidden = true
            firstLangText.isHidden = true
            textInfo.isHidden = false
        default:
            break;
        }
    }

    @IBAction func selectTextLanguage(_ sender: UISegmentedControl) {
        switch textSegmentedControl.selectedSegmentIndex {
        case 0:
            firstLangText.isHidden = false
            secondLangText.isHidden = true
            thirdLangText.isHidden = true
            translationA.isHidden = true
            translationB.isHidden = true
            translationC.isHidden = true
        case 1:
            firstLangText.isHidden = true
            secondLangText.isHidden = false
            thirdLangText.isHidden = true
            translationA.isHidden = true
            translationB.isHidden = true
            translationC.isHidden = true
        case 2:
            firstLangText.isHidden = true
            secondLangText.isHidden = true
            thirdLangText.isHidden = false
            translationA.isHidden = true
            translationB.isHidden = true
            translationC.isHidden = true
        default:
            break;
        }
    }

    @IBAction func selectTranslationLanguage(_ sender: UISegmentedControl) {
        switch translationSegmentedControl.selectedSegmentIndex {
        case 0:
            translationA.isHidden = false
            translationB.isHidden = true
            translationC.isHidden = true
            firstLangText.isHidden = true
            secondLangText.isHidden = true
            thirdLangText.isHidden = true
        case 1:
            translationA.isHidden = true
            translationB.isHidden = false
            translationC.isHidden = true
            firstLangText.isHidden = true
            secondLangText.isHidden = true
            thirdLangText.isHidden = true
        case 2:
            translationA.isHidden = true
            translationB.isHidden = true
            translationC.isHidden = false
            firstLangText.isHidden = true
            secondLangText.isHidden = true
            thirdLangText.isHidden = true
        default:
            break;
        }
    }

我也想获取列的名称。我该怎么办？

Answer 1

尝试Set heading on-这将打开或关闭列标题。