SQLite：通过传递两个值来检索记录

Question

我有一个表“TABLE_QUESTION”。我需要通过传递 exam_id 和 question_Id 来获取记录。我写了一个查询来从表中获取记录，但它显示异常"SQLite Exception near question_id"。

以下是我的查询供您参考..

 String selectQuery=("select * from question where exam_id ='" + examId + " and question_id ='" + questionId +"'" );
        Cursor cursor = db.rawQuery(selectQuery, null);  

Answer 1

在examId + "必须examId + " '

之后，您错过了一个单引号

String selectQuery=("select * from question where exam_id ='" + examId + "' and question_id ='" + questionId +"'" );