waiting for mySQL to die

Semester 2/SQL Hell

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+/* select the snumbers and the number of parts suppled and the average qty of parts supplied for those suppliers who have a qty greater than the average qty of all suppliers. */
+select avg(qty)
+from spj
+group by snumber;
+
+#/ average of parts supplied */
+select avg(qty)
+from spj;
+
+/* select the snumbers and the number of parts suppled and the average qty of parts supplied for those suppliers who have a qty greater than the average qty of all suppliers. */
+select snumber, avg(qty)
+from spj
+group by snumber
+having avg(qty) > (
+   
+	(select avg(qty) from spj));
+
+	
+	
+	
+/* select number and the avg qty for suppliers whos range is greater tham the sum of all qty */

Semester 2/SQL Hell.txt

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+/* select the snumbers and the number of parts suppled and the average qty of parts supplied for those suppliers who have a qty greater than the average qty of all suppliers. */
+select avg(qty)
+from spj
+group by snumber;
+
+#/ average of parts supplied */
+select avg(qty)
+from spj;
+
+/* select the snumbers and the number of parts suppled and the average qty of parts supplied for those suppliers who have a qty greater than the average qty of all suppliers. */
+select snumber, avg(qty)
+from spj
+group by snumber
+having avg(qty) > (
+   
+	(select avg(qty) from spj));
+
+	
+	
+
+
+/* select number and the avg qty for suppliers whose range is greater tham the sum of all qty */
+select snumber, avg(qty), (select avg(qty) as AVERAGE_QTY_OF_ALL)
+from spj
+group by snumber
+having avg(qty) >
+ (select avg(qty) 
+  from spj);
+
+/* list snumber, snames, and total number of parts supplied for suppliers who live in london, athens or paris, Use nested selects. 
+1. Use WHERE clause only without nested selects.
+2. Use nested selects .
+*/
+
+select supplier.snumber, sname, pnumber, city
+from supplier, spj
+where supplier.snumber = spj.snumber and
+(city = 'paris' or city = 'london');
+
+select supplier.snumber, sname, count(pnumber) as NUM_PARTS_SUPPLIED
+from supplier, spj
+where supplier.snumber = spj.snumber and
+(city = 'paris' or city = 'london')
+group by spj.snumber;
+
+select supplier.snumber, count(pnumber) as NUM_PARTS_SUPPLIED 
+(select sname from supplier where snumber = spj.snumber)
+(select city from supplier where snumber = spj.snumber)
+from spj