Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_47893 ( "Year" real, "Album" text, "Release type" text, "Label" text, "Hungarian top 40 album charts" text )

### Question ###
What was the name of the album that was a demo release?

### Accurate SQL ###

SELECT "Album" FROM table_47893 WHERE "Release type" = 'demo'