Contenido del Curso

SQL Tutorial for Beginners

1. Database & Introduction to Syntax

Meet the SQL Select the Songs!SQL Select Column SQL Distinct SQL Where Challenge Where SQL And, Or, Not

2. SQL Aggregate Functions

SQL Min and Max Challenge Min and Max SQL Count, Sum, Avg Challenge Count

3. Filtering Statements

SQL Null SQL Like Challenge Like SQL Between SQL Order By Challenge Order By SQL Group By Challenge Group By SQL Top and Limit SQL Aliases SQL Having Challenge Having SQL Comments

Select the Songs!

Database

Of course, we will work with some database, and it will be Music Database. Below you can see a single table songs with records in it:

It contains info:

id - the unique id for the record

title - the name of the song

singer - song's band or singer

album - song's album

price - the price of this record

year - the year of the release.

In this course, we will work only with the songs table, so explore and remember which columns it contains. In the advanced course, we'll extend the database with more tables and connections between them.

Each table has a unique name. Each column has a unique name inside the table, but columns from different tables can have the same namings.

Let's start with the very first command SELECT. This simple command lets you retrieve some data from table.


              1
            
SELECT * FROM songs

Here * means all records with all fields, and songs is the table we extract the records from. As a result, you'll get all data stored in songs.

Remember that your code can contain only one SELECT statement.

Tarea

Retrieve all data from the table songs.

Tarea

Retrieve all data from the table songs.

SQL is not case-sensitive, so you can write select or Select. Same about other commands, table and column names. Records inside the tables are case-sensitive: you cannot write abba or Abba for ABBA value. We'll use the upper-case notation for a better demonstration.

During the course, you'll complete a lot of tasks, and for some attempts to send a query you may receive the <span style='color:red'>Internal Server Error</span> as an output. Most likely, it means that the result of your query is empty (there is no matching record, or the database is empty, for example). Try to change the query so the result is non-empty, and send it again.

Cambia al escritorio para practicar en el mundo realContinúe desde donde se encuentra utilizando una de las siguientes opciones

¿Todo estuvo claro?

Sección 1. Capítulo 2

Select the Songs!

Database

Of course, we will work with some database, and it will be Music Database. Below you can see a single table songs with records in it:

It contains info:

id - the unique id for the record

title - the name of the song

singer - song's band or singer

album - song's album

price - the price of this record

year - the year of the release.

Each table has a unique name. Each column has a unique name inside the table, but columns from different tables can have the same namings.

Let's start with the very first command SELECT. This simple command lets you retrieve some data from table.


              1
            
SELECT * FROM songs

Here * means all records with all fields, and songs is the table we extract the records from. As a result, you'll get all data stored in songs.

Remember that your code can contain only one SELECT statement.

Tarea

Retrieve all data from the table songs.

Tarea

Retrieve all data from the table songs.

SQL is not case-sensitive, so you can write select or Select. Same about other commands, table and column names. Records inside the tables are case-sensitive: you cannot write abba or Abba for ABBA value. We'll use the upper-case notation for a better demonstration.

Cambia al escritorio para practicar en el mundo realContinúe desde donde se encuentra utilizando una de las siguientes opciones

¿Todo estuvo claro?

Sección 1. Capítulo 2

Select the Songs!

Database

Of course, we will work with some database, and it will be Music Database. Below you can see a single table songs with records in it:

It contains info:

id - the unique id for the record

title - the name of the song

singer - song's band or singer

album - song's album

price - the price of this record

year - the year of the release.

Each table has a unique name. Each column has a unique name inside the table, but columns from different tables can have the same namings.

Let's start with the very first command SELECT. This simple command lets you retrieve some data from table.


              1
            
SELECT * FROM songs

Here * means all records with all fields, and songs is the table we extract the records from. As a result, you'll get all data stored in songs.

Remember that your code can contain only one SELECT statement.

Tarea

Retrieve all data from the table songs.

Tarea

Retrieve all data from the table songs.

SQL is not case-sensitive, so you can write select or Select. Same about other commands, table and column names. Records inside the tables are case-sensitive: you cannot write abba or Abba for ABBA value. We'll use the upper-case notation for a better demonstration.

Cambia al escritorio para practicar en el mundo realContinúe desde donde se encuentra utilizando una de las siguientes opciones

¿Todo estuvo claro?

Database

Of course, we will work with some database, and it will be Music Database. Below you can see a single table songs with records in it:

It contains info:

id - the unique id for the record

title - the name of the song

singer - song's band or singer

album - song's album

price - the price of this record

year - the year of the release.

Each table has a unique name. Each column has a unique name inside the table, but columns from different tables can have the same namings.

Let's start with the very first command SELECT. This simple command lets you retrieve some data from table.


              1
            
SELECT * FROM songs

Here * means all records with all fields, and songs is the table we extract the records from. As a result, you'll get all data stored in songs.

Remember that your code can contain only one SELECT statement.

Tarea

Retrieve all data from the table songs.

SQL is not case-sensitive, so you can write select or Select. Same about other commands, table and column names. Records inside the tables are case-sensitive: you cannot write abba or Abba for ABBA value. We'll use the upper-case notation for a better demonstration.

Cambia al escritorio para practicar en el mundo realContinúe desde donde se encuentra utilizando una de las siguientes opciones

Sección 1. Capítulo 2

Cambia al escritorio para practicar en el mundo realContinúe desde donde se encuentra utilizando una de las siguientes opciones