What is a Storage Definition Language (SDL)? In my Databases lecture, the teacher mentioned that SQL is not just a data definition language (DDL), data manipulation language (DML) and view definition language (VDL), but also a storage definition language (SDL). The last usage doesn't come with any further explanations or examples.

Searching for extra information on the internet regarding using SQL as a SDL yields no relevant results. Could anyone give an example of using SQL as a storage definition language?

Edit:

Would a specification such as MySQL's SET storage_engine=MYISAM; count as a storage definition? It doesn't really relate to the data being stored, but rather, how it's stored.
You may want to ask your teacher to define "SDL".  I don't think the term appears in the SQL standard.  I found this reference (see page 3), and I disagree: SQL does not define the physical structure, the physical bytes per field, the physical field order, the physical sorting, or "mixed records", whatever that might mean.  SQL doesn't define fields at all, or records, or say anything about how the data are stored on the disk if they're stored on the disk.  

That said, every vendor does provide some means for the administrator to define where the data will be kept, and many offer varying levels of control over physical storage aspects (e.g. ISAM, clustered indexes).  AFAIK all that stuff lies outside the SQL standard.  I've used DBMSs that understand SQL DML, but completely separate mechanisms for defining tables and storage.