Where can I find free data sets to practice SQL?

Where can I practice SQL queries for free?

This leaves you free to roll up your sleeves and get your hands dirty with plenty of practice problems and successful SQL statements.SQL Fiddle. SQL Fiddle is a great place to start if you're looking to, well, fiddle around with SQL. ... SQLZOO. ... Oracle LiveSQL. ... W3resource. ... Stack Overflow. ... DB-Fiddle. ... GitHub. ... Coding Ground.Learning SQL? 12 Ways to Practice SQL Online

Where can I get free datasets?

10 Great Places to Find Free Datasets for Your Next ProjectGoogle Dataset Search.Kaggle.Data.Gov.Datahub.io.UCI Machine Learning Repository.Earth Data.CERN Open Data Portal.Global Health Observatory Data Repository.10 Great Places to Find Free Datasets for Your Next Project - CareerFoundry

How do I test a SQL query without a database?

Having said that, there are many options for exercising SQL without an underlying database:1You can use an on-line "fiddle" to test SQL queries, such as SQLFiddle.com.2For unit tests, you'd use a mock framework. ... 3If I were testing Spring/Hibernate data access, I would use an in-memory, lightweight H2 database.How to run SQL Expression Query without any underlying database

What data is publicly available?

“Publicly available” refers to data and/or biospecimens that are accessible to anyone in the general public, without the need for special qualifications, permissions, or privileges. Examples include data/biospecimens available for public purchase, searchable online, or available at a library.