Can we make this??

Is it possible to create an OS entirely, purely in Java?

It is possible to make a bootable VM. However, depending on what you mean by "purely in Java" it may not be possible. When the computer boots, it needs some native machine code to get going, it can't just start reading Java bytecodes and execute them. So you would need some native code. There are native compilers for Java, but you would probably want to write the "kernel" of your bootable VM in C or assembler, etc...

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    hi there
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    SELECT
    au1.bu_id,
    au1.first_nam,
    au1.last_nam,
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    c.first_nam_d,
    c.last_nam_d,
    c.birth_dte_d,
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    schd_evnt se,
    SCHD_evnt_stat ses,
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    c.id = ca.client_id_k AND
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    SELECT
    au1.bu_id,
    au1.first_nam,
    au1.last_nam,
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    c.first_nam_d,
    c.last_nam_d,
    c.birth_dte_d,
    c.ssn_num_d,
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    ssc.dsc,
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    sea.ATTENDEE_TYP
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    schd_evnt se,
    SCHD_evnt_stat ses,
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    Hi,
    it is difficult to change this query without the possibility to test it in a worksheet. But try the following query.
    I think it should be the same result as your 3 queries.
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         au1.last_nam,
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         c.first_nam_d,
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         c.birth_dte_d,
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         se.id schd_event_id,
         seu.dsc,ssc.dsc,
         decode(sea.access_typ,NULL,' ',sea.access_typ) AS sea.access_typ,
         decode(sea.ATTENDEE_TYP,NULL,' ',sea.ATTENDEE_TYP) AS sea.ATTENDEE_TYP
    FROM CLIENT c,
         APP_USER au1,
         SCHD_STAT_CD ssc,
         schd_event_url seu,
         schd_evnt se,
         SCHD_evnt_stat ses,
         SCHD_EVNT_ATTENDEE sea,
         CLIENT_APPT ca
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