Скачать или смотреть Aggregate Functions and GROUP BY | Learn Spatial DB with PostGIS, QGIS | Part 9 |

Material for Practice: https://gisschools.com/course_details...

Join us in this next installment of our Spatial Databases series, where we delve into aggregate functions and the GROUP BY clause using PostGIS and QGIS. We'll explore how to summarize data effectively and group results based on specific criteria. Dive into advanced SQL techniques tailored for spatial data analysis.

Chapters:
0:00:42 - Overview of Aggregate Functions and GROUP BY
0:01:09 - Exploring the Database Structure
0:02:04 - Understanding Aggregate Functions
0:02:53 - Counting Rows with COUNT()
0:03:53 - Calculating Average with AVG()
0:04:23 - Finding Maximum Value with MAX()
0:05:38 - Rounding Values with ROUND()
0:05:56 - Using Alias for Column Names
0:06:32 - Introduction to GROUP BY Clause
0:07:33 - Filtering Data with WHERE Clause
0:09:00 - Grouping by Multiple Columns
0:09:47 - Ordering and Grouping Data

#Aggregate #GoupBy #Postgresql #PostGIS #QGIS

Searching Topics:
SQL Server video :- Explain aggregate functions,group by clause and having keyword ?,
GROUP BY with Aggregate functions in SQL statement,
Understanding the use of GROUP BY clause in SQL,
PostgreSQL: Group By Having | Course | 2019,
SQL Aggregate Functions - SUM, AVG(n), COUNT, MIN, MAX Functions | DBMS,
Aggregate Functions in PostgreSQL(Advanced),
Aggregate Functions(Basic),
PostgreSQL: Group By | Course | 2019,
Understanding the use of GROUP BY clause in SQL,
Introduction to PostGIS,
PostGIS Databases and Geoprocessing,

Complete Course : Learn Spatial Databases with PostGIS and QGIS

1) How to Install PostgreSQL | Learn Spatial Databases with PostGIS and QGIS
   • How to Install PostgreSQL | Learn Spatial ...  

2) How to Install PostGIS | Learn Spatial Databases with PostGIS and QGIS
   • How to Install PostGIS | Learn Spatial Dat...  

3) How to Import/Export Shapefile into Databases with PostGIS Manager
   • How to Import/Export Shapefile into Databa...  

4) How to Import / Export Shapefile from QGIS DB Manager into PostGIS
   • How to Import / Export Shapefile from QGIS...  

5) Working with PostGIS By using pgAdmin and QGIS DB Manager
   • Working with PostGIS By using pgAdmin and ...  

6) PostgreSQL Backup and Restore Spatial Database with PGAdmin4
   • PostgreSQL Backup and Restore Spatial Data...  

7) Postgres: SQL SELECT Statement | PostGIS and QGIS | Eng Subtitles
   • Postgres: SQL SELECT Statement | PostGIS a...  

8) PostgreSQL: The WHERE clause | Learn Spatial DB with PostGIS and QGIS
   • PostgreSQL: The WHERE clause | Learn Spati...  

9) Aggregate Functions and GROUP BY | Learn Spatial DB with PostGIS, QGIS
   • Aggregate Functions and GROUP BY  | Learn ...  

10) Multi Table Joins in PostgreSQL | Learn Spatial DB with PostGIS, QGIS
   • Multi Table Joins  in  PostgreSQL | Learn ...  

11) The CASE Statement, DataType and Operators in Postgres | PostGIS, QGIS
   • The CASE Statement, DataType and Operators...  

12) Spatial Reference ID and Geometry Field in PostGIS | PostgreSQL, QGIS
   • Spatial Reference ID and Geometry Field in...  

13) Spatial Queries - Working with Geometries PostGIS | PostgreSQL | QGIS
   • Spatial Queries - Working with Geometries ...  

14) Measurements Area, Length in PostGIS | Geography vs Geometry
   • Measurements  Area, Length in PostGIS | Ge...  

15) Find latitude, Longitude (X,Y) from Multi-Geometry in PostGIS
   • Find latitude, Longitude (X,Y) from Multi-...  

16) How to Handel Spatial Relationships of GIS Objects in PostGIS | PostgreSQL
   • How to Handel Spatial Relationships of GIS...  

17) Spatial Joins with Multi-Table in PostGIS | PostgreSQL
   • Spatial Joins with Multi-Table in PostGIS ...  

18) Geometry Processing Functions and Spatial Joins in PostGIS | QGIS
   • Geometry Processing Functions and Spatial ...  

19) Step-by-Step: Create Spatial Tables & Add Geometry Columns in PostGIS with QGIS
   • Step-by-Step: Create Spatial Tables & Add ...  

20) How to Create Spatial and Attribute Indexes in PostGIS with QGIS
   • How to Create Spatial and Attribute Indexe...  

21) How to Add Geometry to a Feature Using the INSERT Statement in PostGIS with QGIS
   • How to Add Geometry to a Feature Using the...  

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