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If you are a database developer and you put performance as goal to achieve with your DB design...then using PL/PGSQL functions is your excellent tool.
This is the 2nd part of this course
In this course we will learn all about functions :
Usage benifits.
Structure & structure components.
Syntax to create a function.
And the core part of any function which is the body ... we will see with examples of which parts the body build.
We see the different kinds of implementations in the body , starting with the variables, queries and the return results.
We see with examples the different datatypes that we can RETURNS from a function
We see the parameters that we can use to create a function .
How to deal with different types of data that we process in a function such as ARRAY and mix data types value…
How to RETURNS TABLES, RECORDS or Scalar variables.
How to use special queries such as insert ,update ,delete with returning ... or use INTO clause and how to apply FOR & FOREACH Loops
how to use PERFORM and EXECUTE
All this we will practice with live examples on a postgresql server.
P.S : THIS FUNCTIONS course in total consist of 2 parts with more than 15 videos divided in 2 parts in compliance with rules
Learn what are Postgresql functions and their benifets.
Learn the types of PL/PGSQL Functions types.
How to apply each function type in a Postgresql server,
practice with examples of all types of functions.
10 years practical experience with Postgresql database... and Postgres Pro :
1- Databases (cluster)
3a- Install fully encrypted cluster of databases from customized package.
3b- Create databases,tables,views,domains .
3c- Assign permissions(Roles & Authorities) to users.
3d- Replicate(backup) the master server cluster to a replica server...for Postgresql and PosftresPro.
3e- Optimize queries performance with indexes ,Partitioning of tables & Sharding of databases.
3f- extensive knowledge of PL/PGSQL(Triggeres,Functions & Procedures)
3f- Logging and monitoring of database activities.
2- Create SSL certificates for the Server,Intermediate,Chain,Client .
3- ERD & EER diagrams for database ..and converting the diagram into database Physical Data Model.
4- Apply Postgresql to Android applications & Web Applications
5- Flutter : Build android application user interface (U.I).
6- Ubuntu server : install & optimize.
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Functions that RETURNS void
00:13:55
Functions that RETURNS SETOF any type
00:08:08
Functions that takes OUT parameter
00:15:53
Functions RETURNS table using RETURN QUERY and RETURN NEXT
Functions RETURNS Scalar variable taking Multiple parameters .. and Functions Returns Scalar ARRAY
Functions using FOR loop with different RETURNS types
Functions using FOREACH loop with Multiple rows entry
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