The document outlines an agenda for discussing SQL aggregation functions like COUNT, SUM, MIN, MAX, AVG and how to use them. It covers how to account for NULL values, group on multiple fields, order results, use the HAVING clause to filter on aggregates, filter on both aggregates and non-aggregates, and use DISTINCT. Examples are provided for COUNT, SUM and using GROUP BY. The presentation aims to explain how to use SQL aggregation functions and clauses.

1. Presented by Aaron Buma

2. Agenda
 COUNT(), SUM(), MIN(), MAX(), AVG()
 Accounting for NULLs
 Grouping on multiple fields
 Ordering Results
 HAVING – Filtering on Aggregate fields
 Filtering on Aggregate and non-aggregate fields
 DISTINCT

3. COUNT(), SUM(), MIN(), MAX(), AVG()
 function(expression) – Expressions generally column name
 COUNT(x) – number of matching records, can be *, 1,
column
 SUM(x) – summation of expression or column per group
 MIN(x) – minimum of expression value per group
 MAX(x) – maximum of expression value per group
 AVG(x) – average of expression value per group

4. Aggregation Details
 Accounting for NULLs
 Grouping on Multiple Fields
 ORDER BY on Aggregate Fields

5. HAVING - Filtering on Aggregate Fields
 The ‘HAVING’ clause
 Including non-Aggregate field in filtering

6. DISTINCT - Filtering on Aggregate Fields
 The ‘DISTINCT’ clause
 How to include with COUNT(), MIN(), MAX(), AVG()
 Does it account for NULLS?

7. Question 1

8. SELECT DateRecorded,
VoteID,
COUNT(User) AS [Count]
FROM VoterTable
GROUP BY DateRecord,
VoteID;

9. Question 2
 Total Cost of inventory on hand?

10. Question 2

11. Any Questions?
 COUNT(), SUM(), MIN(), MAX(), AVG()
 Accounting for NULLs
 Grouping on multiple fields
 Ordering Results
 HAVING – Filtering on Aggregate fields
 Filtering on Aggregate and non-aggregate fields
 DISTINCT