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Learning by doing
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Trainers with practical experience
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Classroom training
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Detailed course material
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Clear content description
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Tailormade content possible
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Training that proceeds
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Small groups
In the course Queries with PostgreSQL, participants learn the syntax and use of the query language SQL in the context of a PostgreSQL database. SQL is an ANSI and ISO standard Query language that is applicable in all relational database management systems (DBMS). With SQL you can both retrieve and modify data in PostgreSQL.
After an introduction to relational databases, the SQL standard and PostgreSQL, the installation of PostgreSQL, the PostgreSQL environment and tooling are discussed. PostgreSQL, like other DBMS systems, has added extra features of its own to standard SQL and these are also covered in the course.
In the first place it is covered how SQL statements can be created and executed in PostgreSQL. Subsequently, the various components of SQL are discussed step-by-step, such as Data Definition Language with CREATE TABLE and Data Manipulation Language with INSERT and UPDATE.
Next attention is paid to writing SELECT queries. This includes clauses such as WHERE, ORDER BY, LIKE and BETWEEN .. AND. The grouping of data by means of GROUP and HAVING clauses is also on the course schedule.
The various standard SQL functions are also discussed. Among other things, the mathematical, conversion and aggregation functions for calculating sum and average are treated. Attention is also paid to PostgreSQL specific functions for pattern matching and the processing of geometric and XML data.
PostgreSQL is known for its robust referential and transactional integrity. In that respect the relationship between primary and foreign keys and restrictive and cascading foreign keys is treated. Also covered is how PostgreSQL handles transactions, the commit and rollback statements and how to prevent data corruption in PostgreSQL.
Next it is discussed how to combine data from different tables by means of joins. The various types of joins such as inner joins, left outer joins, right joins, right outer joins and full outer joins are discussed. Finally attention is paid to the application of SET operators such as UNION and INTERSECT and the command line interface of PostgreSQL is also treated.
The course Queries with PostgreSQL is designed for developers, database administrators and other interested parties who wish to learn and use PostgreSQL SQL.
This course has no specific requirements. General knowledge of system development and databases is beneficial to a good understanding.
The theory is treated on the basis of presentation slides. Demos are used to explain the theory. There is ample opportunity to practice. The course times are from 9.30 to 16.30.
Participants receive an official certificate Queries with PostgreSQL after successful completion of the course.
Module 1 : PostgreSQL Introduction |
Module 2 : SQL Introduction |
Module 3 : Data Definition |
| Databases DBMS Systems Types of Database Models Entities and relationships Relational databases PostgreSQL tools Installing PostgreSQL PostgreSQL versions |
SQL Foundations PostgreSQL GUI Client Connection Navigator Creating and Using Connections SQL Worksheet Statements and execution SQL History Storing statements |
CREATE TABLE Specifying Columns ALTER TABLE NULL and Default Values DROP COLUMN DROP TABLE PURGE Virtual columns |
Module 4 : Data Manipulatie |
Module 5 : SQL Queries |
Module 6 : Grouping |
| Data Manipulation Language Transaction control Inserting rows INSERT statement Updating rows UPDATE statement DELETE statement TRUNCATE TABLE DML on virtual columns |
Selecting rows SELECT statement FROM clause Specifying conditions WHERE clause Sorting with ORDER BY NULLs, FIRST, LAST Removing Doubles BETWEEN, IN, ANY, ALL |
GROUP BY clause Filtering groups HAVING clause Operators String and Date Operators Concatenate operator PostgreSQL Encode Operators for patterns Operators for intervals |
Module 7 : Functions |
Module 8 : Joins |
Module 9 : SET Operators |
| Function of column values Using functions SELECT clause functions WHERE clause functions GROUP BY clause functions HAVING clause functions ORDER BY clause functions String and Arithmetic functions Date and Conversion functions National Language Support NLS parameters Cast |
Joining Multiple Tables Normal Joins Outer Join Inner joins Left Outer Joins Right Joins, Right Outer Joins Full Outer Joins Multiple Join Vonditions Subselections Sub Queries EXISTS |
SET Operatoren UNION UNION ALL INTERSECT MINUS Nesting of SET operators Working with Command Line Connect statement and /nolog SQL buffer Storing statements Spool files Transaction control |
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