List out all stations name that having a mean temperature 20 degree Celsius in year 2014.
mean temperature refers to mean_temperature_f; mean temperature of 20 degree Celsius refers to DIVIDE(SUBTRACT(mean_temperature_f, 32), 1.8) = 20; in 2014 refers to date LIKE'%2015%';
SELECT DISTINCT T2.start_station_name, T2.end_station_name FROM weather AS T1 INNER JOIN trip AS T2 ON T1.zip_code = T2.zip_code WHERE T1.date LIKE '%2014' AND T1.mean_temperature_f = 20 * 1.8 + 32
CREATE TABLE IF NOT EXISTS "station"
(
    id                INTEGER not null
        primary key,
    name              TEXT,
    lat               REAL,
    long              REAL,
    dock_count        INTEGER,
    city              TEXT,
    installation_date TEXT
);
CREATE TABLE IF NOT EXISTS "status"
(
    station_id      INTEGER,
    bikes_available INTEGER,
    docks_available INTEGER,
    time            TEXT
);
CREATE TABLE IF NOT EXISTS "trip"
(
    id                 INTEGER not null
        primary key,
    duration           INTEGER,
    start_date         TEXT,
    start_station_name TEXT,
    start_station_id   INTEGER,
    end_date           TEXT,
    end_station_name   TEXT,
    end_station_id     INTEGER,
    bike_id            INTEGER,
    subscription_type  TEXT,
    zip_code           INTEGER
);
CREATE TABLE IF NOT EXISTS "weather"
(
    date                           TEXT,
    max_temperature_f              INTEGER,
    mean_temperature_f             INTEGER,
    min_temperature_f              INTEGER,
    max_dew_point_f                INTEGER,
    mean_dew_point_f               INTEGER,
    min_dew_point_f                INTEGER,
    max_humidity                   INTEGER,
    mean_humidity                  INTEGER,
    min_humidity                   INTEGER,
    max_sea_level_pressure_inches  REAL,
    mean_sea_level_pressure_inches REAL,
    min_sea_level_pressure_inches  REAL,
    max_visibility_miles           INTEGER,
    mean_visibility_miles          INTEGER,
    min_visibility_miles           INTEGER,
    max_wind_Speed_mph             INTEGER,
    mean_wind_speed_mph            INTEGER,
    max_gust_speed_mph             INTEGER,
    precipitation_inches           TEXT,
    cloud_cover                    INTEGER,
    events                         TEXT,
    wind_dir_degrees               INTEGER,
    zip_code                       TEXT
);
