我有一张这样的表:
// numbers
+----+--------+
| id | numb |
+----+--------+
| 1 | zero |
| 2 | one |
| 3 | two |
| 4 | three |
| 5 | four |
| 6 | five |
| 7 | six |
| 8 | seven |
| 9 | eight |
| 0 | nine |
+----+--------+
现在我尝试将每行(仅numb
列)的值复制/粘贴到上一列。所以这是预期的结果:
+----+--------+
| id | numb |
+----+--------+
| 1 | one |
| 2 | two |
| 3 | three |
| 4 | four |
| 5 | five |
| 6 | six |
| 7 | seven |
| 8 | eight |
| 9 | nine |
| 0 | zero |
+----+--------+
实际上我可以通过PHP做到这一点。我的意思是我可以获取所有行并移动一个itam然后更新它们。但我想知道我可以用纯mysql做到吗?
答案 0 :(得分:2)
除了最大id之外的所有行都将更新。最大ID仍然会有相同的麻木。 (在这种情况下为System.setProperty("webdriver.chrome.driver","C:\\Users\\ABCD\\Desktop\\chromedRiver.exe");
WebDriver driver=new ChromeDriver();
driver.get("http://www.facebook.com");
driver.findElement(By.xpath(".//*[@id='email']")).sendKeys("xxx");
driver.findElement(By.xpath(".//*[@id='pass']")).sendKeys("xxx");
driver.findElement(By.xpath(".//*[@id='u_0_m']")).click();
Thread.sleep(2000);
Alert alert=driver.switchTo().alert();
String msg= alert.getText();
System.out.println(msg);
Thread.sleep(2000);
alert.accept();
)
9,'eight'
答案 1 :(得分:0)