關於 update from table ，我們在網路上蒐集到這些相關的討論、資訊與評價

🔥 และในวันนี้ แอดจะพาเพื่อน ๆ มาทำความรู้จักกับอีกหนึ่งคำสั่งเจ๋ง ๆ ใน SQL นั่นก็คือเจ้า EXPLAIN นั่นเองจ้าาา ~~
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👉 เจ้านี่มันคืออะไร มีรายละเอียดและวิธีการใช้งานยังไง ถ้าพร้อมแล้วมาอ่านกันเลยยย !!
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✨ EXPLAIN - เป็นคำสั่งที่ใช้บอกรายละเอียดในการ Query ข้อมูล เพื่อใช้วัดประสิทธิภาพในการ Query ข้อมูลนั่นเอง
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👨‍💻 Syntax
EXPLAIN (QUERY Statement) ; /* ONLY TAKES COMMAND AS PARAMETER */
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เจ้า EXPLAIN สามารถใช้นำหน้าคำสั่ง SELECT, UPDATE, INSERT และ DELETE ได้
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📑 วิธีการใช้งาน

🔸 Query ปกติ
SELECT * FROM demo_table WHERE demo_column = 'Demo Value';
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🔸 Query โดยใช้ EXPLAIN
EXPLAIN SELECT * FROM demo_table WHERE demo_column = 'Demo Value';
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จะได้ผลลัพธ์ ดังนี้
id: 1
select_type: SIMPLE
table: demo_table
partitions: NULL
type: const
possible_keys: PRIMARY
key: PRIMARY
key_len: 4
ref: const
rows: 1
filtered: 100.00
Extra: NULL
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🔸 id - id ของ Query EXPLAIN
🔸 select_type - แสดงความซับซ้อนของ Query ผลลัพธ์ด้านบนจะอยู่ในระดับ SIMPLE
🔸 table - แสดงชื่อของตาราง
🔸 partitions - แสดง Partitions ของตารางที่ใช้ใน Query
🔸 type - ระบุประเภทของการ Join
🔸 possible_keys - แสดง Key ที่ใช้
🔸 key - แสดงความยาวของ Key ที่ใช้
🔸 ref - การอ้างอิงที่ใช้ใน Query เมื่อทำการ Comparing Columns
🔸 rows - แสดงจำนวนแถว
🔸 filtered - แสดงเปอร์เซ็นต์ของแถวตามเงื่อนไขที่ระบุ
🔸 Extra - ข้อมูลเพิ่มเติมของ Query
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🌟 ประโยชน์
- ใช้เพื่อแสดงข้อมูลเกี่ยวกับการ Query
- มีประโยชน์มากในการออกแบบ Schema และ Index
- ใช้ตรวจสอบคำสั่ง Query ว่ามีประสิทธิภาพหรือไม่ เช่น วัดความเร็วในการ Query, ตรวจสอบการแบ่ง - Partition ของตาราง เป็นต้น
- ช่วยเพิ่มประสิทธิภาพในการ Query ข้อมูลใน Database
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💥 Source : https://arctype.hashnode.dev/mysql-understanding-explain , https://www.geeksforgeeks.org/explain-in-sql/
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borntoDev - 🦖 สร้างการเรียนรู้ที่ดีสำหรับสายไอทีในทุกวัน

國際賽事 為中華隊加油打氣！也為我加油💪 gogogo
Dear Asian NFs,

As we are getting closer to the 2021 Nations Cup Asian qualifier, I thought it would be useful to share the following update with you:

Following nations will participate in the upcoming qualifiers from Asia:

India
Taiwan (https://matchpokerfed.org/chinese-taipei-starts-2021-nations-cup-preparations/)
Hong Kong
Japan
Israel
Korea
Philippines
Singapore
Mongolia

Please see below the rules for the qualifiers and participation:
Each nation will be required to submit a squad of 6-10 athletes, including atleast one male and one female.
The minimum squad size is 6 and maximum 10.
The qualifier will be a single day event - anticipating about 6 hours of gameplay.
Ideally, we expect the team to come together to one central location to participate.
The NF will be responsible for appointing one ‘referee’ to oversee the proceedings, ensure no communication between team members while play is on and to help resolve any potential tech issues.
Teams must be wearing their national jerseys while participating.
Each participant will need 2 devices - one to connect to the video conference with his/her immediate table opponents, and a second device to play Match Poker from. A laptop and phone/tablet is perfect.
Each participant will need to have their audio and video on and connected at all times during gameplay (with headphones being used).

親愛的亞洲國家聯盟，

隨著我們越來越接近2021年國家杯亞洲預選賽，我認為與您分享以下最新信息會很有幫助：

以下國家將參加亞洲即將舉行的預選賽：

印度
台灣（https://matchpokerfed.org/chinese-taipei-starts-2021-nations-cup-preparations/）
香港
日本
以色列
朝鮮
菲律賓
新加坡
蒙古

請參閱以下有關預選賽和參與的規則：
每個國家/地區都必須提交6至10名運動員組成的小組，其中至少包括一名男性和一名女性。
最小班級人數為6，最大為10。
資格賽將是一天的活動-預計大約6個小時的遊戲時間。
理想情況下，我們希望團隊能夠聚集到一個中心位置參加。
NF將負責任命一名“裁判”來監督程序，確保比賽進行時團隊成員之間沒有任何溝通，並幫助解決任何潛在的技術問題。
參賽隊伍必須穿著國家隊球衣。
每個參與者將需要2台設備-一種用於與他/她的直接牌桌對手連接到視頻會議，另一種用於從中玩Match Poker。 手提電腦和電話/平板電腦是完美的。
在遊戲過程中（使用耳機），每個參與者都需要始終打開並連接其音頻和視頻。#中華隊 #中華隊加油 #ifmp #tw #集氣 #斑斑的浪子生活

It's only been a few months in our new place, but we've already had so many occasions - Christmas, my birthday, and Chinese New Year.
The LEMA lemamobili side console by W. Atelier is the first thing that greets me when I get home. I just love that it comes with drawers to store my clutter so the tabletop is always tidy. ✨

On the other side is our informal chill-out area where we play board games and spend time as a family. 🎲 The Bea dining armchairs by Roberto Lazzeroni are my favourite piece of furniture in the entire house. Not only does it look refinely good, the shell-shaped backrest makes it so comfortable to sit in any direction.

When we have guests over, this area becomes a kids' table too! 🍕🍝 And yes, I have been nervous about their dirty hands on my chairs! Thankfully, it’s unfounded because any mess is actually quite easy to wipe off!
I look forward to making more memories with my family and kids with these wonderful furnitures. ❤️

From 1 March to 26 March, W. Atelier is having a seasonal sale with up to 70% off on selected designer furniture! You can browse iconic pieces from international brands as Lema, Fritz Hansen and Vitra, and get a new piece for your home at big savings! Now available at the W. Atelier showroom at 201 Henderson Road.

#watelier

#discoveryshoresboracayisland

This beautiful view is in front of this award-winning, iconic, unforgettable and luxurious resort in Boracay Island, the Philippines.
But the only true about what I said is, “unforgettable”.

After a long walk from station 3 to DiscoveryS hores Boracay, I decided to grab my favorite pasta, aglio olio. There were a few people taking photos of food at the entrance and I was greeted by a guard who happened to be the owner, and the waiter of the resort.

His greetings was so warm, he asked if I had a QR code, which is required before you get in the island. His tone was so condescending and unfriendly, and so I thought, he was the owner, acting as a guard. I politely answered “yes, and I would not be able to get inside the island itself, if I did not have one.” Hence, my response for his already condescending voice. He answered back with a more condescending voice “I am just asking!” Which was then again, obvious from the first question he asked, because, it sounded with a question mark AND an exclamation point.

I eagerly asked if they had pasta, and he said he had to go inside first and check. When I was approaching him again, to ask if there serve pasta, he asked “what kind of pasta?”, now the guard became the waiter. I did not know a luxurious hotel hires a guard and a waiter at the same time.

The resort had a few people. Yes, which means there were plenty of vacant tables inside. He then approached me and ask me to dine it at a location where the table was filthy, the chair was dirty, and secluded from the rest of the guests. I confirmed four times with the manager if it was really their protocol, to let the walk-in guest eat there. Which was then a lie because I saw a few people dining it at the better place, not hotel guests, but walk-ins.

Discovery Shores Boracay Island, where the guard and manager discriminate people.
Discovery Shores Boracay Island, where they market their resort as luxurious but their service is rated as one star. No, let’s make it unrateable.
Discovery Shores Boracay Island, a place where people with Sony A7C and professional cameras are discriminated. Vloggers are not welcomed.
#discoveryshoresboracay #boracayisland #boracay2021

Another month, another favourite video! Honestly, getting used to being home and cherishing all that’s left of it.
#MayFavourites #May #favouritesvideo

Here's rounding up my favourites for this month.

P R O D U C T S M E N T I O N E D

➥ Cake Toppers + Cut out’s | Urban Lil (@urbanlil)
➥ Burnt Cheese Cake | Paparch Sg( @paparchsg)
➥ Matcha Powder | Pure Chimp: https://purechimp.asia/
➥ Kimchi | Omma’s Kimchi
➥ Nespresso Capsule Drawer | Lazada: https://www.lazada.sg/products/nespresso-capsule-drawer-stand-holds-up-to-40-nespresso-capsules-storage-display-holder-coffee-pod-modern-slim-design-durability-quality-stable-construction-i169739107-s220715288.html?mp=1?
➥ Multi-pants hanger | Lazada: https://www.lazada.sg/products/homenhome-3-in-1-pants-rack-1pcs-closet-hanger-for-trousers-ties-scarf-shawl-space-saving-i530250834-s1490212025.html?mp=1?
➥ Baby Bumper | Lazada: https://www.lazada.sg/products/20-pcs-table-table-corner-protector-edge-protector-baby-safety-buffer-protective-caps-impact-protection-for-child-safety-i268214373-s416809256.html?mp=1?
*UPDATE: I would not actually recommend these baby bumpers anymore. They were good for a start but about 4 months into using them, they've started to fall off easily..*
➥ Nudy Veil (Primer) | B.glen
➥ Mules | Kate Spade New York
➥ Sneakers | Repetto
➥ Hot pants | Longchamp

I hope you enjoyed watching and don't forget to subscribe and like if you'd like to see more monthly favourite videos from me! :)

INSTAGRAM | http://instagram.com/melissackoh
BLOG | http://www.melissackoh.com
FACEBOOK | https://www.facebook.com/melissackoh/

✐ C O N T A C T
⇢ contact@melissacelestinekoh.com

This video is not sponsored. All opinions are my own.

少しでもいいなと思っていただければ高評価＆チャンネル登録お願いします！

華音です。今回はイギリス政府から届いた手紙の開封と、最近コロナが広まってからより多く届くようになった詐欺のメールの紹介や、コロナ太りに効果のある方法を６つ紹介しました。多くのお金を使って首相から手紙が届くなんて思ってもみませんでした。今こそ皆で一丸となって乗り越えようというメッセージは、どこでも言っていることだけど手紙という形で受け取るのはまた違った重みがあるなと思いました。

こちらがイギリスの首相が書いた手紙の原文です。

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I am writing to you to update you on the steps we are taking to combat coronavirus.
In just a few short weeks, everyday life in this country has changed dramatically. We all feel the profound impact of coronavirus not just on ourselves, but on our loved ones and our communities.
I understand completely the difficulties this disruption has caused to your lives, businesses and jobs. But the action we have taken is absolutely necessary, for one very simple reason.
If too many people become seriously unwell at one time, the NHS will be unable to cope. This will cost lives. We must slow the spread of the disease, and reduce the number of people needing hospital treatment in order to save as many lives as possible.

That is why we are giving one simple instruction - you must stay at home.
You should not meet friends or relatives who do not live in your home. You may only leave your home for very limited purposes, such as buying food and medicine, exercising once a day and seeking medical attention. You can travel to and from work but should work from home if you can.
When you do have to leave your home, you should ensure, wherever possible, that you are two metres apart from anyone outside of your household.
These rules must be observed. So, if people break the rules, the police will issue fines and disperse gatherings.
I know many of you will be deeply worried about the financial impact on you and your family. The government will do whatever it takes to help you make ends meet and put food on the table.
The enclosed leaflet sets out more detail about the support available and the rules you need to follow. You can also find the latest advice at gov.uk/coronavirus
From the start, we have sought to put in the right measures at the right time. We will not hesitate to go further if that is what the scientific and medical advice tells us we must do.
It's important for me to level with you - we know things will get worse before they get better. But we are making the right preparations, and the more we all follow the rules, the fewer lives will be lost and the sooner life can return to normal.
I want to thank everyone who is working flat out to beat the virus, in particular the staff in our fantastic NHS and care sector across England, Scotland, Wales and Northern Ireland. It has been truly inspirational to see our doctors, nurses and other carers rise magnificently to the needs of the hour.

Thousands of retired doctors and nurses are returning to the NHS - and hundreds of thousands of citizens are volunteering to help the most vulnerable. It is with that great British spirit that we will beat coronavirus and we will beat it together.
That is why, at this moment of national emergency, I urge you, please, to stay at home, protect the NHS and save lives.
Boris Johnson
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🌱YouTube
【http://www.youtube.com/c/kanonchannel】
（私の日常を丸ごと。インタビューや旅もするかな）

🌱Instagram
【https://www.instagram.com/kanon_act/】
（心惹かれた場所や服で自由気ままに）

🌱Twitter
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（思っていることを呟くよ！）

【使用楽曲など】
DOVA-SYNDROME: https://dova-s.jp/
Purple planet: https://www.purple-planet.com
（動画によって使っていないものもあります。）