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PID
926185047
1003101114
1006090344
1019104206
1006081343
925085128
925091019
925094250
925113421

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PID
0926185047
1003101114
1006090344
1019104206
1006081343
0925085128
09250 ......

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SELECT foliono, GroupNo, COUNT(BlockNo) AS ZCOUNT, BlockNo
from GuestFolios
GROUP BY BlockNo, GroupNo, FolioNo

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    foliono  GroupNo  ZCOUNT  BlockNo
3 0 1 0
4 0 1 0
12 0 1 0
13 13 1 4
27 13 1 26
28 13 1 26
29 13 1 26 ......

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SQL code:
select a.nm
from a
where a.op_id=(select a.op_id
from a,b
where a.op_id=b.u_id and b.or_id=(select b.or_id
from b,c
where b.or_id=c.re_id and c.re_id='000 ......

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±íÃû£ºMyTable

Dept      Name
1        a
1        b
2        c
2        d
2        e
3        NULL

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......

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