Set of PPT presentation slides
Set of PPT presentation slides
Set of PPT presentation slides
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Sebastian Mate // Department for Medical Informatics // University <strong>of</strong> Erlangen-Nuremberg<br />
Data Export<br />
SQL statement construction<br />
OP1.E<br />
A<br />
B<br />
C<br />
OP1.A OP1.V<br />
2<br />
4<br />
OP2.E<br />
A<br />
B<br />
C<br />
OP2.A OP2.V<br />
2<br />
5<br />
4<br />
E<br />
A<br />
B<br />
A<br />
…<br />
…<br />
V<br />
4<br />
9<br />
INSERT INTO TEMPTABLE(E, A, V)<br />
SELECT OP1.E, „Sum…“, OP1.V + OP2.V<br />
FROM<br />
(SELECT E, A, V FROM …) OP1<br />
FULL OUTER JOIN<br />
(SELECT E, A, V FROM …) OP2<br />
ON OP1.E = OP2.E<br />
WHERE OP1.V IS NOT NULL AND …<br />
Write result into<br />
temporary table<br />
28
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