Question

以下是我的sqlite查询。如何将结果保存在字符串中？我想将查询结果保存在字符串中。下面是我的查询，它在sqlite编辑器中给出了结果，但我希望在代码中得到它。

SELECT COUNT(*),SUM(Fare)  FROM jobs WHERE timeweek  > '2014/03/24 20:20'

private static final String KEY_COMPID = "_compid";
private static final String KEY_TIMEJOB = "timejob";
private static final String KEY_TIMEWEEK = "timeweek";  

private static final String KEY_PICK = "pick";
private static final String KEY_DEST = "dest";
private static final String KEY_FARE = "fare";
                        + KEY_TIME + " TEXT" + ")";
    String CREATE_COMPLETED_TABLE = "CREATE TABLE " + TABLE_COMPLETED_JOBS
            + "(" + KEY_COMPID + " INTEGER PRIMARY KEY," + KEY_TIMEJOB
            + " TEXT,"   + KEY_PICK + " TEXT," + KEY_DEST + " TEXT,"
            + KEY_FARE + " TEXT,"
            + KEY_TIMEWEEK + " DateTime" + ")";

public String  totaljobsaearnafterlogin() {
int cnt;

String selectQuery = "SELECT COUNT(*),SUM(Fare)  FROM" + 
    TABLE_COMPLETED_JOBS + " WHERE " +KEY_TIMEWEEK+"  > '2014/03/24 20:10'";    

SQLiteDatabase db = this.getWritableDatabase();
Cursor cursor = db.rawQuery(selectQuery, null);
// looping through all rows and adding to list


//cursor.moveToFirst();
cnt= cursor.getCount();

cursor.close();

db.close();

Answer 1

String selectQuery = "SELECT COUNT(*) as count ,SUM(Fare) as fare  FROM" + 
    TABLE_COMPLETED_JOBS + " WHERE " +KEY_TIMEWEEK+"  > '2014/03/24 20:10'";   


Cursor cursor = db.rawQuery(selectQuery, null);
cursor.moveToFirst();
cnt= cursor.getCount();
if(cnt > 0) {
   int count = cursor.getInt(cursor.getColumnIndex("count"));

   int fareSum = cursor.getInt(cursor.getColumnIndex("fare"));

   String result = count + " " + fareSum;
}
cursor.close();

Answer 2

您应该迭代行并获取每个元素。

Cursor cursor = db.rawQuery(selectQuery, null);
String string = "";

if (cursor.moveToNext()) {
   string += "Count: " + cursor.getString(1) + "\n";
   string += "Fare:  " + cursor.getString(2) + "\n";

}

如何在字符串中保存查询结果

2 个答案: