SQLzoo.net

Tutorial Section

1) SELECT:

In which we query the BBC country profile table.

2a) More practice with SELECT:

Additional practice of the basic features using a table of Nobel Prize winners.

2b) SELECT in SELECT:

In which we form queries using other queries.

3) SUM and COUNT:

In which we apply aggregate functions. [more the same]

4) The JOIN operation:

In which we join two tables; ttms and country. [previously music tutorial]

5) More JOIN operations:

In which we join actors to movies in the Movie Database.

6) Using Null:

In which we look at teachers in departments. [previously Scottish Paliament]

7) Self join:

In which we join Edinburgh bus routes to Edinburgh bus routes.

Help wanted

SQLZoo is going wiki - please contribute.

SQL User Manuals

[ Mimer | MySQL | Oracle | SQL Server | Access | DB2 | Sybase | Postgres | SQLite ]

Online copies of implementation specific user manuals.

Starting SQL

[ MySQL | Oracle | SQL Server | DB2 | Postgres ]

How to connect to the server and execute SQL statements.

Programming with SQL

[ SQL in perl on the Web | SQL from Java ]

SQL standard

[ SQL92 BNF ]

Reference Section: how to...

1) SELECT:

How to read the data from a database.

2) CREATE and DROP:

How to create tables, indexes, views and other things. How to get rid of them.

3) INSERT and DELETE

How to put records into a table, change them and how to take them out again.

4) DATE and TIME

How to work with dates; adding, subtracting and formatting.

5) Functions

How to use string functions, logical functions and mathematical functions.

6) Users

How to create users, GRANT and DENY access, get at other peoples tables. How to find processes and kill them.

7) Meta Data

How to find out what tables and columns exist. How to count and limit the rows return.

Error Messages

Some error messages from SQL engines

Answers

Answers to the tutorial questions.

Assessments

These exercises involve larger databases. Answers to these questions are not available to students.

Other information

Diversions