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The first exercise is to develop a conceptual model representing the entities of a carsharing organization. A German description of the system is here and an English translation here.
The reference solution for the conceptual design is here.
In the second lesson, we map the conceptual design onto a logical design. In addition to mapping entity types and relationships, please pay particular attention to the following cases:
The Postgres manual about DDL can be found here (sections 5.1 and 5.10). In particular, read the section on inheritance. For the syntax definition how to create types and tables, see here and here.
The slides shown in the lab are here.
The solutions for the logical design in the form of PostgreSQL-DDL
are here (types) and here (tables). A diagram reverse-engineered from the actual schema is here
Define primary key, foreign key, uniqueness, not null,
and semantic(check) constraints for the logical schema (see previous topic).
See here
for the relevant parts in the manual.
The slides shown in the lab
are here.
Execute updates (Insert, Update, Delete) on your database. Try to violate the constraints you previously defined. (There is no referencesolution for this topic).
In order to have sufficient data to test, please load a database dump containing the table definitions and data. The dump file is here. Restore the dump as follows:
pg_restore -O -v -d cashdb -U cashu -v cashdb-plain.tar
How to display and read execution plans is described here. Slides shown in the lab are here. A script to load more data into a table for performance analysis is here.
A page with the SQL exercises can be found
here.
You can also download the SQL exercises here.
Please record your own solutions in a file so that they can be compared to the reference solution later.
... are here:
... are here.
Documentation about transactions is
here in the manual.
The slides shown in the lecture are here.
Exercises can be downloaded here.
Solutions are
here.
Preparation: Views are documented
here. The slides shown in the lecture are here.
In the exercises on views we will also cover other approaches how to implement specialization
hierarchies. The script containing the table definitions for the two hierarchies
(Member and Vehicle) without table inheritance are
here. A script for filling the tables is
here.
Exercises are
here.
Preparation: Chapter 38.5, 43
in the manual. We will only use SQL and PL/pgSQL as
implementation languages. You thus do not need to read the sections on PL/TCL,
PL/Perl and PL/Python etc.
Slides are
here.
Exercises are
here.
Preparation: Chapter 39 and 40
in the manual.
Slides are
here.
Exercises are
here.
In the last lesson we take a look at users, roles, and authentication. Scripts can be found as follows:
The slides shown in the lecture are here.