All data from first table is not showing proper data in sql - sql

Question

I am trying to add two tables, in which first table contains all the video details, and in second table details of video seen by the user with user_id and video_id. I just want to add both the tables and it will show all the list of videos from first table but if the video is seen by the user, status will show 1 else 1.
Here is my query,
SELECT
videos.id, videos.lang_id, videos.medical_type_id, videos.name,
videos.description, videos.thumbnail, videos.video, videos.video_type,
videos.delete_status,
CASE
WHEN video_quews.user_id = $user_id
THEN $user_id
ELSE 'ok'
END AS user_id,
video_quews.video_id, video_quews.created_at,
CASE
WHEN video_quews.video_id = videos.id
THEN 1
ELSE 0
END AS status
FROM
videos
LEFT JOIN
video_quews ON videos.id = video_quews.video_id
ORDER BY
video_quews.video_id DESC
Currently, videos are repeating.
Please help me out
here is my response,
{
"message": "All related videos",
"status": "success",
"code": 200,
"videos": [
{
"id": "30",
"lang_id": "2",
"medical_type_id": "15",
"name": "Fracture",
"thumbnail": "thumbnail_images/1579869167.png",
"video": "videos/fracture.m4v",
"video_type": "2",
"delete_status": "1",
"user_id": "6",
"video_id": "30",
"created_at": "2021-03-04 23:29:50",
"status": "1"
},
{
"id": "16",
"lang_id": "2",
"medical_type_id": "14",
"name": "Electrocution",
"thumbnail": "thumbnail_images/1579698529.png",
"video": "videos/ELECTROCUTION.m4v",
"video_type": "2",
"delete_status": "1",
"user_id": "ok",
"video_id": "16",
"created_at": "2021-03-05 08:19:29",
"status": "1"
},
{
"id": "15",
"lang_id": "2",
"medical_type_id": "13",
"name": "Adult CPR & AED(Cardiac Arrest)",
"thumbnail": "thumbnail_images/1579698505.png",
"video": "videos/CPR1.mp4",
"video_type": "2",
"delete_status": "1",
"user_id": "ok",
"video_id": "15",
"created_at": "2021-03-05 08:18:38",
"status": "1"
},
{
"id": "14",
"lang_id": "2",
"medical_type_id": "12",
"name": "Choking",
"thumbnail": "thumbnail_images/1579698405.png",
"video": "videos/Choking.mp4",
"video_type": "2",
"delete_status": "1",
"user_id": "ok",
"video_id": "14",
"created_at": "2021-03-05 08:17:47",
"status": "1"
},
{
"id": "13",
"lang_id": "2",
"medical_type_id": "11",
"name": "Chest pain",
"thumbnail": "thumbnail_images/1579698381.png",
"video": "videos/CHESTPAIN.mp4",
"video_type": "2",
"delete_status": "1",
"user_id": "ok",
"video_id": "13",
"created_at": "2021-03-05 08:17:20",
"status": "1"
},
{
"id": "12",
"lang_id": "2",
"medical_type_id": "10",
"name": "Burns",
"thumbnail": "thumbnail_images/1579698360.png",
"video": "videos/Burns.mp4",
"video_type": "2",
"delete_status": "1",
"user_id": "ok",
"video_id": "12",
"created_at": "2021-03-05 08:16:39",
"status": "1"
},
{
"id": "11",
"lang_id": "2",
"medical_type_id": "9",
"name": "Breathing Difficulties",
"thumbnail": "thumbnail_images/1579698344.png",
"video": "videos/BreathingDifficulties.mp4",
"video_type": "2",
"delete_status": "1",
"user_id": "ok",
"video_id": "11",
"created_at": "2021-03-05 08:16:19",
"status": "1"
},
{
"id": "8",
"lang_id": "2",
"medical_type_id": "6",
"name": "Asthma",
"thumbnail": "thumbnail_images/1579698286.png",
"video": "videos/ASTHMA.mp4",
"video_type": "2",
"delete_status": "1",
"user_id": "ok",
"video_id": "8",
"created_at": "2021-03-05 08:15:59",
"status": "1"
},
{
"id": "24",
"lang_id": "2",
"medical_type_id": "22",
"name": "Fits/Seizures",
"thumbnail": "thumbnail_images/1579698775.png",
"video": "videos/SEIZURES.m4v",
"video_type": "2",
"delete_status": "1",
"user_id": "ok",
"video_id": null,
"created_at": null,
"status": "0"
},
{
"id": "26",
"lang_id": "2",
"medical_type_id": "24",
"name": "Sprain, strain",
"thumbnail": "thumbnail_images/1579698853.png",
"video": "videos/SPRAIN&STRAIN.mp4",
"video_type": "2",
"delete_status": "1",
"user_id": "ok",
"video_id": null,
"created_at": null,
"status": "0"
},
{
"id": "28",
"lang_id": "2",
"medical_type_id": "26",
"name": "Disposing Glove",
"thumbnail": "thumbnail_images/1579698903.png",
"video": "videos/disposingglove.mp4",
"video_type": "1",
"delete_status": "1",
"user_id": "ok",
"video_id": null,
"created_at": null,
"status": "0"
},
{
"id": "31",
"lang_id": "2",
"medical_type_id": "8",
"name": "Bleeding",
"thumbnail": "thumbnail_images/1581498917.png",
"video": "videos/bleeding.mp4",
"video_type": "2",
"delete_status": "1",
"user_id": "ok",
"video_id": null,
"created_at": null,
"status": "0"
},
{
"id": "18",
"lang_id": "2",
"medical_type_id": "16",
"name": "Gunshot Wound",
"thumbnail": "thumbnail_images/1579698550.png",
"video": "videos/Gunshot.mp4",
"video_type": "2",
"delete_status": "1",
"user_id": "ok",
"video_id": null,
"created_at": null,
"status": "0"
},
{
"id": "20",
"lang_id": "2",
"medical_type_id": "18",
"name": "Hypoglycemia",
"thumbnail": "thumbnail_images/1579698684.png",
"video": "videos/Hypoglycemia.mp4",
"video_type": "2",
"delete_status": "1",
"user_id": "ok",
"video_id": null,
"created_at": null,
"status": "0"
},
{
"id": "22",
"lang_id": "2",
"medical_type_id": "20",
"name": "Nose Bleeding",
"thumbnail": "thumbnail_images/1579698728.png",
"video": "videos/nosebleeding.mp4",
"video_type": "2",
"delete_status": "1",
"user_id": "ok",
"video_id": null,
"created_at": null,
"status": "0"
},
{
"id": "25",
"lang_id": "2",
"medical_type_id": "23",
"name": "Snake Bite",
"thumbnail": "thumbnail_images/1579698801.png",
"video": "videos/SnakeBite.mp4",
"video_type": "2",
"delete_status": "1",
"user_id": "ok",
"video_id": null,
"created_at": null,
"status": "0"
},
{
"id": "27",
"lang_id": "2",
"medical_type_id": "25",
"name": "Stroke",
"thumbnail": "thumbnail_images/1579698879.png",
"video": "videos/STROKE.m4v",
"video_type": "2",
"delete_status": "1",
"user_id": "ok",
"video_id": null,
"created_at": null,
"status": "0"
},
{
"id": "29",
"lang_id": "2",
"medical_type_id": "27",
"name": "Dog Bite",
"thumbnail": "thumbnail_images/1579698934.png",
"video": "videos/Dogbite.mp4",
"video_type": "2",
"delete_status": "1",
"user_id": "ok",
"video_id": null,
"created_at": null,
"status": "0"
},
{
"id": "32",
"lang_id": "2",
"medical_type_id": "7",
"name": "Allergy",
"thumbnail": "thumbnail_images/1581580973.png",
"video": "videos/Allergy.mp4",
"video_type": "2",
"delete_status": "1",
"user_id": "ok",
"video_id": null,
"created_at": null,
"status": "0"
},
{
"id": "19",
"lang_id": "2",
"medical_type_id": "17",
"name": "Hyperthermia(Heat Exhaustion)",
"thumbnail": "thumbnail_images/1579698575.png",
"video": "videos/Hyperthermia.mp4",
"video_type": "2",
"delete_status": "1",
"user_id": "ok",
"video_id": null,
"created_at": null,
"status": "0"
},
{
"id": "21",
"lang_id": "2",
"medical_type_id": "19",
"name": "Introduction",
"thumbnail": "thumbnail_images/1579698707.png",
"video": "videos/intro.mp4",
"video_type": "1",
"delete_status": "1",
"user_id": "ok",
"video_id": null,
"created_at": null,
"status": "0"
},
{
"id": "23",
"lang_id": "2",
"medical_type_id": "21",
"name": "Recovery Position",
"thumbnail": "thumbnail_images/1579698747.png",
"video": "videos/RecoveryPosition.mp4",
"video_type": "2",
"delete_status": "1",
"user_id": "ok",
"video_id": null,
"created_at": null,
"status": "0"
}
],
}
Below is my database,
enter image description here

Answer 1

I just want to add both the tables and it will show all the list of videos from first table but if the video is seen by the user, status will show 1 else 1.
I think you want a flag indicating if a user has seen a video. For this, I suggest EXISTS:
select v.*,
(case when exists (select 1
from video_quews vq
where v.id = vq.video_id and vq.user_id = $user_id
)
then 1 else 0
end) as has_user_flag
from videos v