What are the names of photos taken with the lens brand 'Sigma' or 'Olympus', and count them by a bar chart, and could you display in descending by the names?
CREATE TABLE camera_lens (
    id int,
    brand text,
    name text,
    focal_length_mm real,
    max_aperture real
)

CREATE TABLE mountain (
    id int,
    name text,
    Height real,
    Prominence real,
    Range text,
    Country text
)

CREATE TABLE photos (
    id int,
    camera_lens_id int,
    mountain_id int,
    color text,
    name text
)
SELECT T1.name, COUNT(T1.name) FROM camera_lens AS T1 JOIN photos AS T2 ON T2.camera_lens_id = T1.id WHERE T1.brand = 'Sigma' OR T1.brand = 'Olympus' GROUP BY T1.name ORDER BY T1.name DESC
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: What are the names of photos taken with the lens brand 'Sigma' or 'Olympus', and count them by a bar chart, and could you display in descending by the names? ### Input: CREATE TABLE camera_lens (
    id int,
    brand text,
    name text,
    focal_length_mm real,
    max_aperture real
)

CREATE TABLE mountain (
    id int,
    name text,
    Height real,
    Prominence real,
    Range text,
    Country text
)

CREATE TABLE photos (
    id int,
    camera_lens_id int,
    mountain_id int,
    color text,
    name text
) ### Response: SELECT T1.name, COUNT(T1.name) FROM camera_lens AS T1 JOIN photos AS T2 ON T2.camera_lens_id = T1.id WHERE T1.brand = 'Sigma' OR T1.brand = 'Olympus' GROUP BY T1.name ORDER BY T1.name DESC