sql - How can I get sets of 2 entries where each set starts with a different letter and no letter is repeated from a sqlite database? -

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like this:

apple aardvark banana bet cow car ... zipper zoo

assuming database has more 2 different entries start of letters. thinking of doing top , wildcards, don't know enough sql pull off. can do?

you can substr function , correlated subquery:

select * yourtable wordfield in (select wordfield                      yourtable b                     substr(a.wordfield ,1,1) = substr(b.wordfield ,1,1)                     order wordfield                     limit 2)

demo: sql fiddle

you can use order by adjust 2 records returned. order random() if that's supported.


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