5.4 The following two SQL queries attempt to find the names of sailors with higher ranking and less than 25 years old. SELECT S.sname FROM Sailors S WHERE NOT EXISTS ( SELECT * FROM Sailors S2 WHERE...

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5.4 The following two SQL queries<br>attempt to find the names of sailors<br>with higher ranking and less than 25<br>years old.<br>SELECT S.sname<br>FROM Sailors S<br>WHERE NOT EXISTS ( SELECT<br>*<br>FROM Sailors S2<br>WHERE S2.age < 25<br>AND S.ranking <= S2.ranking);<br>FROM Sailors S<br>WHERE S.ranking > ANY ( SELECT<br>S2.ranking<br>FROM Sailors S2<br>WHERE S2.age < 25 );<br>a. Do the two queries calculate the<br>result? If not, explain why.<br>b. What conditions will make the two<br>queries obtain the same result?<br>

Extracted text: 5.4 The following two SQL queries attempt to find the names of sailors with higher ranking and less than 25 years old. SELECT S.sname FROM Sailors S WHERE NOT EXISTS ( SELECT * FROM Sailors S2 WHERE S2.age < 25="" and="" s.ranking=""><= s2.ranking);="" from="" sailors="" s="" where="" s.ranking=""> ANY ( SELECT S2.ranking FROM Sailors S2 WHERE S2.age < 25="" );="" a.="" do="" the="" two="" queries="" calculate="" the="" result?="" if="" not,="" explain="" why.="" b.="" what="" conditions="" will="" make="" the="" two="" queries="" obtain="" the="" same="">

Jun 06, 2022

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5.4 The following two SQL queries attempt to find the names of sailors with higher ranking and less than 25 years old. SELECT S.sname FROM Sailors S WHERE NOT EXISTS ( SELECT * FROM Sailors S2 WHERE...

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