Question

以下行显示错误为“SET”附近的sytax错误

         db.update( TABLE_SECOND_NAME,cv, " SET " + COL_SECOND_2 + "= ( CONCAT 
              "+ (COL_SECOND_3+ ", " +name)+ "'ROLL=?",new String[]{roll});

我希望在更新期间保持旧值和新值两者。第一个值已经存储，而新值正在更新。日志为：

       09-29 14:20:37.021 27122-27122/com.example.prince.studentrecord
       E/ViewRootImpl: sendUserActionEvent() mView == null     
      09-29 14:20:37.581 27122-27122/com.example.prince.studentrecord 
       ViewPostImeInputStage ACTION_DOWN  
      09-29 14:20:38.941 27122-27122/com.example.prince.studentrecord 
          D/ViewRootImpl: 
      09-29 14:20:39.231 27122-27122/com.example.prince.studentrecord 
       E/ViewRootImpl: sendUserActionEvent() mView == null
      09-29 14:20:42.061 27122-27122/com.example.prince.studentrecord   

   09-29 14:20:42.161 27122-27122/com.example.prince.studentrecord   
      E/SQLiteLog: (1) near "SET": syntax error

Answer 1

将这些方法用于sqlite数据库的更新表：

public int updateContact（联系联系人）{
SQLiteDatabase db = this.getWritableDatabase（）;

    ContentValues values = new ContentValues();  
    values.put(KEY_NAME, contact.getName());  
    values.put(KEY_PH_NO, contact.getPhoneNumber());  

    // updating row  
    return db.update(TABLE_CONTACTS, values, KEY_ID + " = ?",  
            new String[] { String.valueOf(contact.getID()) });  
}

在数据库中的“set”附近显示语法错误

1 个答案: