Question: Show the names of singers that have more than one song.

singer : singer_id (number) , name (text) , birth_year (number) , net_worth_millions (number) , citizenship (text) | song : song_id (number) , title (text) , singer_id (number) , sales (number) , highest_position (number)

singer : name (text) , singer_id (number) , singer_id (number) | song : singer_id (number) , song_id (number)


Question: What are the names of the singers that have more than one songs?

singer : singer_id (number) , name (text) , birth_year (number) , net_worth_millions (number) , citizenship (text) | song : song_id (number) , title (text) , singer_id (number) , sales (number) , highest_position (number)

singer : name (text) , singer_id (number) , singer_id (number) | song : singer_id (number) , song_id (number)


Question: Show the names of singers and the total sales of their songs.

singer : singer_id (number) , name (text) , birth_year (number) , net_worth_millions (number) , citizenship (text) | song : song_id (number) , title (text) , singer_id (number) , sales (number) , highest_position (number)

singer : name (text) , singer_id (number) , singer_id (number) | song : sales (number) , singer_id (number) , song_id (number)


Question: For each singer name, what is the total sales for their songs?

singer : singer_id (number) , name (text) , birth_year (number) , net_worth_millions (number) , citizenship (text) | song : song_id (number) , title (text) , singer_id (number) , sales (number) , highest_position (number)

singer : name (text) , singer_id (number) , singer_id (number) | song : sales (number) , singer_id (number) , song_id (number)


Question: List the name of singers that do not have any song.

singer : singer_id (number) , name (text) , birth_year (number) , net_worth_millions (number) , citizenship (text) | song : song_id (number) , title (text) , singer_id (number) , sales (number) , highest_position (number)

singer : name (text) , singer_id (number) , singer_id (number) | song : singer_id (number) , song_id (number)


Question: What is the sname of every sing that does not have any song?

singer : singer_id (number) , name (text) , birth_year (number) , net_worth_millions (number) , citizenship (text) | song : song_id (number) , title (text) , singer_id (number) , sales (number) , highest_position (number)

singer : name (text) , singer_id (number) , singer_id (number) | song : singer_id (number) , song_id (number)


Question: Show the citizenship shared by singers with birth year before 1945 and after 1955.

singer : singer_id (number) , name (text) , birth_year (number) , net_worth_millions (number) , citizenship (text) | song : song_id (number) , title (text) , singer_id (number) , sales (number) , highest_position (number)

singer : citizenship (text) , birth_year (number) , singer_id (number)


Question: What are the citizenships that are shared by singers with a birth year before 1945 and after 1955?

singer : singer_id (number) , name (text) , birth_year (number) , net_worth_millions (number) , citizenship (text) | song : song_id (number) , title (text) , singer_id (number) , sales (number) , highest_position (number)

singer : citizenship (text) , birth_year (number) , singer_id (number)


Question: How many available features are there in total?

ref_feature_types : feature_type_code (text) , feature_type_name (text) | ref_property_types : property_type_code (text) , property_type_description (text) | other_available_features : feature_id (number) , feature_type_code (text) , feature_name (text) , feature_description (text) | properties : property_id (number) , property_type_code (text) , date_on_market (time) , date_sold (time) , property_name (text) , property_address (text) , room_count (number) , vendor_requested_price (number) , buyer_offered_price (number) , agreed_selling_price (number) , apt_feature_1 (text) , apt_feature_2 (text) , apt_feature_3 (text) , fld_feature_1 (text) , fld_feature_2 (text) , fld_feature_3 (text) , hse_feature_1 (text) , hse_feature_2 (text) , hse_feature_3 (text) , oth_feature_1 (text) , oth_feature_2 (text) , oth_feature_3 (text) , shp_feature_1 (text) , shp_feature_2 (text) , shp_feature_3 (text) , other_property_details (text) | other_property_features : property_id (number) , feature_id (number) , property_feature_description (text)


Question: What is the feature type name of feature AirCon?

ref_feature_types : feature_type_code (text) , feature_type_name (text) | ref_property_types : property_type_code (text) , property_type_description (text) | other_available_features : feature_id (number) , feature_type_code (text) , feature_name (text) , feature_description (text) | properties : property_id (number) , property_type_code (text) , date_on_market (time) , date_sold (time) , property_name (text) , property_address (text) , room_count (number) , vendor_requested_price (number) , buyer_offered_price (number) , agreed_selling_price (number) , apt_feature_1 (text) , apt_feature_2 (text) , apt_feature_3 (text) , fld_feature_1 (text) , fld_feature_2 (text) , fld_feature_3 (text) , hse_feature_1 (text) , hse_feature_2 (text) , hse_feature_3 (text) , oth_feature_1 (text) , oth_feature_2 (text) , oth_feature_3 (text) , shp_feature_1 (text) , shp_feature_2 (text) , shp_feature_3 (text) , other_property_details (text) | other_property_features : property_id (number) , feature_id (number) , property_feature_description (text)

ref_feature_types : feature_type_name (text) , feature_type_code (text) , feature_type_code (number) | other_available_features : feature_type_code (text) , feature_name (text) , feature_id (number)


Question: Show the property type descriptions of properties belonging to that code.

ref_feature_types : feature_type_code (text) , feature_type_name (text) | ref_property_types : property_type_code (text) , property_type_description (text) | other_available_features : feature_id (number) , feature_type_code (text) , feature_name (text) , feature_description (text) | properties : property_id (number) , property_type_code (text) , date_on_market (time) , date_sold (time) , property_name (text) , property_address (text) , room_count (number) , vendor_requested_price (number) , buyer_offered_price (number) , agreed_selling_price (number) , apt_feature_1 (text) , apt_feature_2 (text) , apt_feature_3 (text) , fld_feature_1 (text) , fld_feature_2 (text) , fld_feature_3 (text) , hse_feature_1 (text) , hse_feature_2 (text) , hse_feature_3 (text) , oth_feature_1 (text) , oth_feature_2 (text) , oth_feature_3 (text) , shp_feature_1 (text) , shp_feature_2 (text) , shp_feature_3 (text) , other_property_details (text) | other_property_features : property_id (number) , feature_id (number) , property_feature_description (text)

ref_property_types : property_type_description (text) , property_type_code (text) , property_type_code (number) | properties : property_type_code (text) , property_id (number)


Question: What are the names of properties that are either houses or apartments with more than 1 room?

ref_feature_types : feature_type_code (text) , feature_type_name (text) | ref_property_types : property_type_code (text) , property_type_description (text) | other_available_features : feature_id (number) , feature_type_code (text) , feature_name (text) , feature_description (text) | properties : property_id (number) , property_type_code (text) , date_on_market (time) , date_sold (time) , property_name (text) , property_address (text) , room_count (number) , vendor_requested_price (number) , buyer_offered_price (number) , agreed_selling_price (number) , apt_feature_1 (text) , apt_feature_2 (text) , apt_feature_3 (text) , fld_feature_1 (text) , fld_feature_2 (text) , fld_feature_3 (text) , hse_feature_1 (text) , hse_feature_2 (text) , hse_feature_3 (text) , oth_feature_1 (text) , oth_feature_2 (text) , oth_feature_3 (text) , shp_feature_1 (text) , shp_feature_2 (text) , shp_feature_3 (text) , other_property_details (text) | other_property_features : property_id (number) , feature_id (number) , property_feature_description (text)

properties : property_name (text) , property_type_code (text) , room_count (number) , property_id (number) | ref_property_types : property_type_code (text) , property_type_code (number)