SQL tutorial v17
EDB Postgres Advanced Server is a relational database management system (RDBMS), which means it's a system for managing data stored in relations. A relation is essentially a mathematical term for a table. Each table is a named collection of rows. Each row of a given table has the same set of named columns, and each column is of a specific data type. Whereas columns have a fixed order in each row, it's important to remember that SQL doesn't guarantee the order of the rows in the table in any way (although you can explicitly sort them for display).
Tables are grouped into databases, and a collection of databases managed by a single EDB Postgres Advanced Server instance constitutes a database cluster.
This tutorial walks you through the main features of an RDBMS using a sample database.
sample_database creating_a_new_table populating_a_table_with_rows querying_a_table joins_between_tables aggregate_functions updates deletions the_sql_language
Sample database
Provides an introduction to the key elements of the sample database
Creating a new table
Describes how to create a new table
Populating a table With rows
Provides an example of how to populate table
Querying a table
Provides an example of how to query a table
Executing joins between tables
Describes how to execute a join query
Aggregating data
Provides an example of how to aggregate data
Updating a table
Provides an example of updating a table
Deleting a table
Provides an example of how to delete a table
The SQL language
Provides an introduction to the subset of the EDB Postgres Advanced Server SQL language that is compatible with Oracle databases