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# Anfragen in SQL

a)

~~~ {.sql}
SELECT pname FROM P WHERE ort IN (SELECT sitz FROM L WHERE lname = "Müller" OR lname = "Schmidt" )
~~~

b)

~~~ {.sql}
SELECT pname FROM P WHERE pnr IN (SELECT LTP.pnr FROM LTP, T WHERE T.tnr = LTP.tnr AND T.gewicht > 10)
~~~

c)

~~~ {.sql}
SELECT lname, status, sitz FROM L ORDER BY status, sitz DESC
~~~

d)

~~~ {.sql}
SELECT tname, farbe, gewicht FROM T WHERE gewicht >= (SELECT MAX(gewicht) FROM T)
~~~

e)

~~~ {.sql}
SELECT P.pname FROM P, LTP LEFT JOIN ( SELECT lnr, COUNT(*) ls FROM L WHERE status <= 30 ) L ON LTP.lnr = L.lnr WHERE LTP.pnr = P.pnr AND L.ls <= 2
~~~

# Anfragen in SQL

a)

~~~ {.sql}
SELECT L.lname FROM L WHERE (SELECT COUNT(*) FROM LTP, P WHERE p.ort = "Berlin" AND LTP.lnr = L.lnr GROUP BY P.pnr) >= (SELECT COUNT(*) FROM P WHERE P.ort = "Berlin")
~~~