#POSTICO TYPES UPDATE#

SELECT name, description FROM neighborhoods Returns a table of all of the columns from the neighborhoods table. Try a few simple queries on the bcworkshop database: SELECT * FROM neighborhoods

Learn more about PostgreSQL, the open-source database, here.

#POSTICO TYPES UPDATE#

For example, with SQL you can update or delete records in the database, as well as perform more sophisticated operations such as to combine and create new tables from your data. SQL is a standard language for accessing and manipulating databases. Modifying records is a simple process of directly editing a cell and typing a change or selecting a row (or rows) and making changes in Postico's sidebar: Double-click a table to view its contents. Once you're connected to the database, Postico will show you a view of all of the tables. To connect to the online database, open Postico and enter the connection parameters in a new favorites window. A Primary Key column is sometimes used to join tables of data together when linked with another kind of constraint called a foreign key. It ensures data integrity within a column by not allowing duplicate values. PRIMARY KEY: One kind of database constraint is called a Primary Key, which is used to uniquely identify records in a table. Their rows (aka records) are used to represent those individual 'things' and their columns are used describe those 'things'.

Tables in a database store data about one type of thing (e.g., neighborhoods and their names, sizes, populations).

In other ways, tables in a database are similar to spreadsheets: By using queries, we can combine and filter the data in helpful ways.

Databases allow us to create complex relationships among the data.

Tables in a database have structure, or rules and constraints about the data they contain (e.g., Primary Key below).

A database is a collection of tables, not just a single table.

There are a few things that make a database different from a regular spreadsheet:

Postico types