sqlite查询相关问题

Question

我有某些具有特定代码的sqlite数据。

String sql = "create table " + TABEL 
    +"(" + BaseColumns._ID+" integer PRIMARY KEY AUTOINCREMENT," + STARTTIME 
    + " text," + ENDTIME + " text," + DURATION + " text," 
    + PHONEOPTION + " text," + MODE + " text);"; 

    db.execSQL(sql); 
    Log.i("DATABASE ", "db created "); 

我想获取持续时间列中没有空数据的行。 我有一定的代码，但它获取其中的所有数据。

public Cursor getData() { 
    SQLiteDatabase sqlitedb = contactsdbHelper.getReadableDatabase(); 
    Cursor cursor = sqlitedb.query(ContactsDatabaseHelper.TABEL, null,null,null, null,null, BaseColumns._ID + " DESC"); 

    startManagingCursor(cursor); 
    return cursor; 

}

Answer 1

试着这么做：

Cursor cursor = sqlitedb.rawQuery(
    "SELECT * FROM " + ContactsDatabaseHelper.TABEL + " WHERE " + 
    ContactsDatabaseHelper.DURATION + " NOT NULL", null);