Querying SQL Server by Aspin Adam;
Author:Aspin, Adam; [Aspin, Adam]
Language: eng
Format: epub
Publisher: BPB Publications
Published: 2022-08-15T00:00:00+00:00
First:
The outer query calculates the average sale price for each make.
Next:
The subquery calculates the overall average sale price for all vehicles sold.
Then:
The subquery then multiplies this average by two and compares it to the average sale price by make for all the makes of car sold.
The result is that any make with an average sale price over twice the overall average sale price is then listed in the query output.
Tricks and Traps
When using calculations to filter data, you need to be aware that
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| Data Modeling & Design | Data Processing |
| Data Warehousing | MySQL |
| Oracle | Other Databases |
| Relational Databases | SQL |
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