The SQL subquery syntax
There is no general syntax; subqueries are regular queries placed inside parenthesis.
Subqueries can be used in different ways and at different locations inside a query:
Here is an subquery with the IN operator
- SELECT column–names
- FROM table–name1
- WHERE value IN (SELECT column–name
- FROM table–name2
- WHERE condition)
Subqueries can also assign column values for each record:
- SELECT column1 = (SELECT column–name FROM table–name WHERE condition),
- column–names
- FROM table–name
- WEHRE condition
SQL Subquery Examples
Problem: List products with order quantities greater than 100.
- SELECT ProductName
- FROM Product
- WHERE Id IN (SELECT ProductId
- FROM OrderItem
- WHERE Quantity > 100)
Results: 12 records
| PoductName |
|---|
| Guaraná Fantástica |
| Schoggi Schokolade |
| Chartreuse verte |
| Jack’s New England Clam Chowder |
| Rogede sild |
| Manjimup Dried Apples |
| Perth Pasties |
 |
SQL Subquery Examples
Problem: List all customers with their total number of orders
- SELECT FirstName, LastName,
- OrderCount = (SELECT COUNT(O.Id) FROM [Order] O WHERE O.CustomerId = C.Id)
- FROM Customer C
This is a correlated subquery because the subquery references the enclosing query (i.e. the C.Id in the WHERE clause).
Results: 91 records
| FirstName | LastName | OrderCount |
|---|---|---|
| Maria | Anders | 6 |
| Ana | Trujillo | 4 |
| Antonio | Moreno | 7 |
| Thomas | Hardy | 13 |
| Christina | Berglund | 18 |
| Hanna | Moos | 7 |
| Frédérique | Citeaux | 11 |
| Martín | Sommer | 3 |
|
||
핑백: SSCN BKN 2021 Kabupaten Mukomuko
핑백: mơ thấy cóc đánh con gì
핑백: cây trồng trong phòng làm việc
핑백: mơ thấy mít chín đánh con gì
핑백: RPA in software testing
핑백: tai game dua ngua
핑백: nằm mơ thấy đứt tay chảy máu
핑백: mơ thấy bàn thờ
핑백: chup anh thay ma
핑백: Tyson vs Jones jr live stream online
핑백: cbd oil buy canada
핑백: Azure Devops
핑백: 안전공원
핑백: incredit patēriņa kredīts
핑백: www.manausa.com
핑백: nằm mơ thấy phật bà quan âm
핑백: mơ thấy đi chợ
핑백: mơ thấy chìa khóa
핑백: mơ cá sấu đánh con gì
핑백: nằm mơ thấy bướm
핑백: michigan state cornhole
핑백: mơ thấy chim bồ câu đánh con gì
핑백: mơ thấy chiến tranh
핑백: site
tinder app , tinder sign up https://tinderdatingsiteus.com/
핑백: Maytag UXT5230AYS manuals
핑백: Arcam Audio tuners manuals
핑백: card dumps
핑백: คอนโดปูนา
핑백: Paket Wisata Bali
핑백: Industrielle Dampfkessel für ganz Deutschland
핑백: sun city west retirement community homes for sale
핑백: Ritalin till salu
핑백: crabs for sale
What’s up to every one, it’s genuinely a fastidious
for me to pay a quick visit this web page, it contains priceless Information.
핑백: relx pod
핑백: health insurance
Your manner of addressin this topic is both terrific and also motivating.
You have covered this topic properly.
핑백: sex offenders in my area montreal
핑백: Toys for Girls
Very few authors with proper expertise of the subjects they blog about.
핑백: ks pod
Too many blog owners nowadays however only a few have blog posts worth spending time on reviewing.
I adore the way you have actually ended this post …
Way too many blog writers nowadays yet very few have blog posts worth spending time on reading.
What an fantastic manner of checking out things.
Not many writers with appropriate knowledge of the topics they blog about.
Just bookmarked this blog post as I have found it quite helpful.
핑백: ดูบอลสด
Precisely the sort of web content that enriches the internet. Many thanks!
Very few writers with proper knowledge of the subjects they blog about.
I would like to thank you for the efforts you’ve put in penning this blog. I really hope to see the same high-grade blog posts by you later on as well. In fact, your creative writing abilities has inspired me to get my own, personal website now ;)|
Saved as a favorite, I love your site!
God job instagram takipci hilesi