After the course, the participant will be able to:

• Connect to a database using a client application,
• Perform simple queries to display data from single tables,
• Use single line functions to transform and convert data and group functions to aggregate entire sets as well as groups of records,
• Formulate complex queries involving joins of multiple tables and simple and correlated,
• Use aliases for columns and tables,
• Use subqueries for processing complex queries
• Manipulate data in tables: enter, modify and delete data,
• Use subqueries in manipulating data,
• Use transactions to approve or reject the effects of editing data.

The training is designed for people who use databases as a source of information when constructing a variety of reports, analyzing data and developing applications.

The participants of the training are required to have basic knowledge of MS Windows environment.

The training is conducted in the form of consecutive training sessions divided into modules. Within a training
module there is a theoretical part explaining a given issue, collectively and independently solved by the
participant exercise and a block of questions and answers.

2 days, 16 training hours

Presentation of the objectives and scope of the training
Licensing principles - open source
Features distinguishing PostgreSQL from other database servers
PgAdmin application
Basics of the relational model of data organization
Concept of a database server
Server objects:

• Bases
• Tablespaces
• Schemas
• Roles 

SQL language - selecting the data
Overlay software for performing queries
Creating simple queries

• Keywords
• Command syntax
• Using aliases for columns and tables

Sorting data
Using functions in queries
Single line functions
Group functions
Filtering on aggregation results
Selecting data from multiple tables

• Ways of joining tables

Types of joins
Equi-join
Non-equi-join
Outer-join:

• left-joined,
• right-handed,
• both sides

Self-join
Collective exercises
Bulk operations on query results

• Sum
• Intersection
• Difference
• Subqueries
• The role of subqueries
• Query decomposition
• Location of subqueries

Simple subqueries
Multiple times nested subqueries
Correlated subqueries
Data Manipulation Language (DML)

• Insert
• Update
• Delete

DML operations based on query results
Transactions

• The idea of transactivity of operations
• Commit
• Rollback
• Savepoint

Repetition of material on key operations in SQL
Additional questions from participants
Training summary

Test
Survey 

• Please choose another course from Database Online Trainings
• PostgreSQL 12.18 Documentation

Current training dates are available in the form!