Java 使用多个条件连接两个SQL语句以连续运行

我有一张如下所示的表：

Row     Student   Major      
 1        Jenn    Math
 2        Jenn    Science
 3        Jenn    CS
 4        Mark    English
 5        Mark    History
 6        Steve   Math 
 7        Steve   Science
 8        Steve   Engineering
 9        Ann     Biology
 10       Ann     Chemistry

我试图在连续的行中寻找模式，学生从数学专业改为科学专业，然后改为第三专业，并标记这些值，这样我就可以：

 Row     Name    Major      Flagged_Values
 1        Jenn    Math
 2        Jenn    Science
 3        Jenn    CS                1
 4        Mark    English
 5        Mark    History
 6        Steve   Math 
 7        Steve   Science
 8        Steve   Engineering       1
 9        Ann     Biology
 10       Ann     Chemistry

在这种情况下，学生Jenn和Steve遇到了这个标准，所以他们会被标记为1

然后，我连续标记那些主修数学、科学和工程的学生，在本例中为Steve，并添加另一个带有1的专栏。我的问题是，如果我有两个单独的语句来标记这些模式，然后我想标记满足这两个标准的值，我将如何做？我会使用addBatch方法吗？我有代码，但它不能产生预期的结果。我正在使用JavaJDBC和使用Oracle数据库的SQL库

String x = "SELECT STUDENTS.ROW, STUDENTS.MAJOR, STUDENTS.NAME " +
  "CASE WHEN prior_row.NAME IS NOT NULL" +
  "AND EXISTS(SELECT 'x' FROM STUDENTS prior_row " +
  "WHERE STUDENTS.MAJOR = prior_row.MAJOR" +
  "AND STUDENTS.ROW > prior_row.ROW + 1" +
  "SELECT STUDENTS.MAJOR, STUDENTS.ROW, STUDENTS.NAME WHERE" +
  "MAJOR < (SELECT MAJOR FROM STUDENTS WHERE MAJOR = 'MATH' 
  "AND WHERE MAJOR > (SELECT MAJOR FROM STUDENTS WHERE MAJOR = 'SCIENCE' THEN 1 ELSE NULL END Flagged_Values";

  st.addBatch(x);

String y = "SELECT STUDENTS.ROW, STUDENTS.MAJOR, STUDENTS.NAME" +
  "CASE WHEN previous.NAME IS NOT NULL" +
  "AND EXISTS(SELECT 'y' FROM STUDENTS previous" +
  "WHERE STUDENTS.MAJOR = previous.MAJOR" +
  "AND STUDENTS.ROW > previous.ROW + 1" +
  "SELECT STUDENTS.MAJOR, STUDENTS.ROW, STUDENTS.NAME WHERE" +
  "MAJOR < (SELECT THE_OUTCOME FROM STUDENTINFO WHERE MAJOR ='Math' +
  "AND WHERE MAJOR > (SELECT MAJOR FROM STUDENTS WHERE MAJOR = 'SCIENCE'" +
  "AND WHERE MAJOR > (SELECT MAJOR FROM STUDENTS WHERE MAJOR = 'Engineering'
  "THEN 1 ELSE NULL END Flag ";

  st.addBatch(y);

---

我试图比较连续的实例。我的第二个问题：这算是数据挖掘吗？任何帮助都将不胜感激。

addBatch仅用于DML插入、更新和删除语句。只需使用ExecuteQuery一个接一个地运行这两条语句，您使用的是哪个数据库？一匹没有名字的马，谢谢，您的答案很有用！