MI-L Sql command for summarising three columns

[Chichester Harbour Conservancy]

I have three columns - seawall type, quality and length.  I would like =
to create a table (query) that will summarise the length data for both =
quality and type (in one go).  Up until now I have only managed to make =
queries on individual selections for each seawall type. ... Any ideas on =
the actual sql query I could use?

from Jacqui Foskett



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