troubleshooting Question

distinct queries

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gudii9Flag for United States of America asked on
DatabasesMicrosoft SQL ServerOracle DatabaseSQL
4 Comments1 Solution119 ViewsLast Modified:
SELECT DISTINCT (First_Name ), distinct (last_name) FROM  CHECKED_OUT WHERE  Book_ID  not null

why above query not working
can i put one distinct for both first name and last name
are these queries case sensitive like unix?

please advise on any good links and resources, videos around this to master
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