pdfcrowd.com open in browser PRO version Are you a developer?
Try out the HTML to PDF API SQL PlaybookAll the queries in the SQL
Playbook reference are available for copying AND pasting so that
you can run themwithout needing to retype.1. A slow full tossFind
the names of employees in the Marketing department.SELECT empfname
FROM qemp WHERE deptname = 'Marketing';2. Skinning a catFind the
items sold by a department on the second floor.2.1 JoinSELECT
DISTINCT itemname FROM qsale, qdeptWHERE qdept.deptname =
qsale.deptnameAND deptfloor = 2;Home Exercises Skill builders Slide
exercises SupportInstructorpdfcrowd.com open in browser PRO version
Are you a developer? Try out the HTML to PDF API2.2 InSELECT
DISTINCT itemname FROM qsale WHERE deptname IN (SELECT deptname
FROM qdept WHERE deptfloor = 2);2.3 Correlated subquerySELECT
DISTINCT itemname FROM qsale WHERE deptname IN (SELECT deptname
FROM qdept WHERE qdept.deptname = qsale.deptname AND deptfloor =
2);2.4 ExistsSELECT DISTINCT itemname FROM qsale WHERE EXISTS
(SELECT * FROM qdept WHERE qsale.deptname = qdept.deptname AND
deptfloor = 2);3. Another full tossFind the names of items sold on
floors other than the second floor.SELECT DISTINCT itemname FROM
qsale, qdeptWHERE qsale.deptname = qdept.deptnameAND deptfloor <
> 2;4. Subtracting from allpdfcrowd.com open in browser PRO
version Are you a developer? Try out the HTML to PDF APIFind the
items sold by no department on the second floor.SELECT DISTINCT
itemname FROM qsaleWHERE itemname NOT IN(SELECT DISTINCT itemname
FROM qsale, qdeptWHERE qsale.deptname = qdept.deptnameAND deptfloor
= 2);5. DividingFind the items sold by all departments on the
second floor.SELECT DISTINCT itemname FROM qitemWHERE NOT
EXISTS(SELECT * FROM qdept WHERE deptfloor = 2AND NOT EXISTS(SELECT
* FROM qsaleWHERE qsale.itemname = qitem.itemnameAND qsale.deptname
= qdept.deptname));SELECT qsale.itemname FROM qsale, qdeptWHERE
qsale.deptname = qdept.deptnameAND qdept.deptfloor = 2GROUP BY
qsale.itemnameHAVING count(distinct qdept.deptname) =(SELECT
count(distinct deptname)from qdept WHERE deptfloor = 2);6. At least
some numberpdfcrowd.com open in browser PRO version Are you a
developer? Try out the HTML to PDF APIFind the items sold by at
least two departments on the second floor.SELECT itemname FROM
qsale, qdeptWHERE qsale.deptname = qdept.deptname AND deptfloor =
2GROUP BY itemnameHAVING COUNT(DISTINCT qdept.deptname) > 1;7. A
friendly IN for an SQL travelerFind the salary of Clare's
manager.SELECT empfname, empsalary FROM qempWHERE empno IN(SELECT
bossno FROM qemp WHERE empfname = 'Clare');8. Joining a table with
itselfFind numbers AND names of those employees who make more than
their manager.SELECT wrk.empno, wrk.empfname FROM qemp wrk, qemp
bossWHERE wrk.bossno = boss.empnoAND boss.empsalary <
wrk.empsalary;9. A combination of subtract from all AND a
self-joinFind the departments WHERE all the employees earn less
than their manager.SELECT DISTINCT deptname FROM qempWHERE deptname
< >'Management'AND deptname NOT IN(SELECT wrk.deptname FROM
qemp wrk, qemp bosspdfcrowd.com open in browser PRO version Are you
a developer? Try out the HTML to PDF APIWHERE wrk.bossno =
boss.empnoAND wrk.empsalary > = boss.empsalary);10. Self-join
with GROUP BYCount the number of direct employees of each
manager.SELECT boss.empno, boss.empfname, COUNT(*)FROM qemp wrk,
qemp bossWHERE wrk.bossno = boss.empnoGROUP BY boss.empno,
boss.empfname;11. A self-join with two matching conditionsFind the
names of employees who are in the same department as their manager
(as an employee). Reportthe name of the employee, the department,
AND the boss's name.SELECT wrk.empfname, wrk.deptname,
boss.empfnameFROM qemp wrk, qemp bossWHERE wrk.bossno =
boss.empnoAND wrk.deptname = boss.deptname;12. Averaging with GROUP
BYList the departments having an average salary over $25,000.SELECT
deptname, AVG(empsalary) FROM qempGROUP BY deptnameHAVING
AVG(empsalary) > 25000;13. Inner query GROUP BY AND
HAVINGpdfcrowd.com open in browser PRO version Are you a developer?
Try out the HTML to PDF APIList the departments WHERE the average
salary of the employees of each manager is more than $25,000.SELECT
wrk.deptname, AVG(wrk.empsalary)FROM qemp wrkWHERE wrk.empno NOT
IN(SELECT qdept.empno FROM qdeptWHERE wrk.empno = qdept.empnoAND
wrk.deptname = qdept.deptname)GROUP BY wrk.deptnameHAVING
AVG(wrk.empsalary) > 25000;14. An IN with GROUP BY AND COUNTList
the name AND salary of the managers with more than two
employees.SELECT empfname, empsalary FROM qempWHERE empno IN(SELECT
bossno FROM qemGROUP BY bossno HAVING COUNT(*) > 2);15. A
self-join with some conditionsList the name, salary, AND manager of
the employees of the Marketing department who have a salary
over$25,000.SELECT wrk.empfname, wrk.empsalary, boss.empfnameFROM
qemp wrk, qemp bossWHERE wrk.bossno = boss.empnoAND wrk.deptname =
'Marketing'AND wrk.empsalary > 25000;pdfcrowd.com open in
browser PRO version Are you a developer? Try out the HTML to PDF
API16. Making comparisonsList the names of the employees who earn
more than any employee in the Marketing department.SELECT empfname,
empsalary FROM qempWHERE empsalary >(SELECT MAX(empsalary) FROM
qempWHERE deptname = 'Marketing');17. An IN with GROUP BY AND
SUMAmong all the departments with total salary greater than
$25,000, find the departments that sell Stetsons.18. A double
divide!List the items delivered by every supplier that delivers all
items of type N.SELECT DISTINCT itemname FROM qdel del WHERE NOT
EXISTS(SELECT * FROM qsplWHERE NOT EXISTS(SELECT * FROM qitem WHERE
itemtype = 'N'AND NOT EXISTS(SELECT * FROM qdelWHERE qdel.itemname
= qitem.itemname AND qdel.splno = qspl.splno))AND NOT EXISTS(SELECT
* FROM qdel WHERE qdel.itemname = del.itemnameAND qdel.splno =
qspl.splno));pdfcrowd.com open in browser PRO version Are you a
developer? Try out the HTML to PDF API19. A slam dunkFind the
suppliers that deliver compasses.SELECT DISTINCT qspl.splno,
splname FROM qspl, qdelWHERE qspl.splno = qdel.splno AND itemname =
'Compass';20. A 6-inch putt for a birdieFind the suppliers that do
not deliver compasses.SELECT splno, splname FROM qsplWHERE splno
NOT IN(SELECT splno FROM qdel WHERE itemname = 'Compass');21.
Making the countFind the suppliers that deliver both compasses AND
an item other than compasses.SELECT DISTINCT qdel.splno, splname
FROM qspl, qdelWHERE qdel.splno = qspl.splnoAND itemname < >
'Compass'AND qdel.splno IN(SELECT splno FROM qdel WHERE itemname =
'Compass');SELECT DISTINCT qdel.splno, splname FROM qspl, qdelWHERE
qdel.splno = qspl.splnoAND qdel.splno IN(SELECT splno FROM qdel
WHERE itemname = 'Compass')GROUP BY qdel.splno, splname HAVING
COUNT(DISTINCT itemname) > 1;pdfcrowd.com open in browser PRO
version Are you a developer? Try out the HTML to PDF API22. Minus
AND divideList the departments that have not recorded a sale for
all the items oftype N.SELECT deptname FROM qdept WHERE deptname
NOT IN(SELECT deptname FROM qdeptWHERE NOT EXISTS(SELECT * FROM
qitem WHERE itemtype = 'N'AND NOT EXISTS(SELECT * FROM qsaleWHERE
qsale.deptname = qdept.deptname ANDqsale.itemname =
qitem.itemname)));23. Division with copiesList the departments that
have at least one sale of all the items delivered to them.SELECT
DISTINCT deptname FROM qdel del1WHERE NOT EXISTS(SELECT * FROM qdel
del2WHERE del2.deptname = del1.deptnameAND NOT EXISTS(SELECT * FROM
qsaleWHERE del2.itemname = qsale.itemnameAND del1.deptname =
qsale.deptname));SELECT DISTINCT deptname FROM qdel del1WHERE NOT
EXISTS(SELECT * FROM qdel del2WHERE del2.deptname =
del1.deptnamepdfcrowd.com open in browser PRO version Are you a
developer? Try out the HTML to PDF APIAND itemname NOT IN(SELECT
itemname FROM qsale
WHERE deptname = del1.deptname));24. A difficult pairingList the
supplier-department pairs WHERE the department sells all items
delivered to it by the supplier.SELECT splname, deptname FROM qdel
del1, qsplWHERE del1.splno = qspl.splnoAND NOT EXISTS(SELECT * FROM
qdelWHERE qdel.deptname = del1.deptnameAND qdel.splno =
del1.splnoAND itemname NOT IN(SELECT itemname FROM qsaleWHERE
qsale.deptname = del1.deptname));25. Two divides AND an
intersectionList the items delivered to all departments by all
suppliers.SELECT itemname FROM qitemWHERE NOT EXISTS(SELECT * FROM
qsplWHERE NOT EXISTS(SELECT * FROM qdelWHERE qdel.itemname =
qitem.itemnameAND qdel.splno = qspl.splno))pdfcrowd.com open in
browser PRO version Are you a developer? Try out the HTML to PDF
APIAND NOT EXISTS(SELECT * FROM qdept WHERE deptnameNOT IN
('Management', 'Marketing', 'Personnel','Accounting',
'Purchasing')AND NOT EXISTS(SELECT * FROM qdelWHERE qdel.itemname =
qitem.itemnameAND qdel.deptname = qdept.deptname));26. A divide
with a matching conditionList the items sold only by departments
that sell all the items delivered to them.SELECT DISTINCT itemname
FROM qsale saleWHERE deptname IN(SELECT deptname FROM qdept
dept1WHERE NOT EXISTS(SELECT * FROM qdelWHERE qdel.deptname =
dept1.deptnameAND itemname NOT IN(SELECT itemname FROM qsaleWHERE
qsale.deptname = dept1.deptname)))AND NOT EXISTS(SELECT * FROM
qsaleWHERE itemname = sale.itemnameAND deptname NOT IN(SELECT
deptname FROM qdept dept2WHERE NOT EXISTS(SELECT * FROM qdelWHERE
qdel.deptname = dept2.deptnameAND itemname NOT INpdfcrowd.com open
in browser PRO version Are you a developer? Try out the HTML to PDF
API(SELECT itemname FROM qsaleWHERE qsale.deptname =
dept2.deptname))));27. Restricted divideWho are the suppliers that
deliver all the items of type N?SELECT splno, splname FROM
qsplWHERE NOT EXISTS(SELECT * FROM qitem WHERE itemtype = 'N'AND
NOT EXISTS(SELECT * FROM qdelWHERE qdel.splno = qspl.splnoAND
qdel.itemname = qitem.itemname));28. A NOT IN variation on
divideList the suppliers that deliver only the items sold by the
Books department.SELECT splname FROM qsplWHERE splno IN (SELECT
splno FROM qdel)AND NOT EXISTS(SELECT * FROM qdelWHERE qdel.splno =
qspl.splnoAND itemname NOT IN(SELECT itemname FROM qsaleWHERE
deptname = 'Books'));29. All AND onlypdfcrowd.com open in browser
PRO version Are you a developer? Try out the HTML to PDF APIList
the suppliers that deliver all AND only the items sold by the
Equipment department.SELECT splname FROM qsplWHERE NOT
EXISTS(SELECT * FROM qsaleWHERE deptname = 'Equipment'AND itemname
NOT IN(SELECT itemname FROM qdelWHERE qdel.splno = qspl.splno))AND
NOT EXISTS(SELECT * FROM qdelWHERE qdel.splno = qspl.splnoAND
itemname NOT IN(SELECT itemname FROM qsaleWHERE deptname =
'Equipment'));30. Divide with an extra conditionList the suppliers
that deliver every item of type C to the same department on the
second floor.SELECT splname FROM qsplWHERE EXISTS (SELECT * FROM
qdeptWHERE deptfloor = 2AND NOT EXISTS (SELECT * FROM qitemWHERE
itemtype = 'C'AND NOT EXISTS (SELECT * FROM qdelWHERE qdel.splno =
qspl.splnoAND qdel.itemname = qitem.itemnameAND qdel.deptname =
qdept.deptname)));pdfcrowd.com open in browser PRO version Are you
a developer? Try out the HTML to PDF API31. At least some COUNTList
the suppliers that deliver at least two items of type N to
departments.SELECT qspl.splno, splname FROM qdel, qspl, qitemWHERE
itemtype = 'n'AND qdel.splno = qspl.splnoAND qdel.itemname =
qitem.itemnameGROUP BY qspl.splno, splnameHAVING COUNT(DISTINCT
qdel.itemname) > 1;32. Double divide with a restrictionList the
suppliers that deliver all the items of type B to departments on
the second floor who sell all theitems of type R.CREATE VIEW v32
AS(SELECT deptname FROM qdeptWHERE deptfloor = 2AND NOT EXISTS
(SELECT * FROM qitemWHERE itemtype = 'R'AND NOT EXISTS (SELECT *
FROM qsaleWHERE qsale.itemname = qitem.itemnameAND qsale.deptname =
qdept.deptname)));SELECT splname FROM qsplWHERE NOT EXISTS (SELECT
* FROM qitemWHERE itemtype = 'B'AND NOT EXISTS (SELECT * FROM
qdelWHERE qdel.itemname = qitem.itemnamepdfcrowd.com open in
browser PRO version Are you a developer? Try out the HTML to PDF
APIAND qdel.splno = qspl.splnoAND deptname IN (SELECT deptname FROM
v32)));33. Triple divide with an intersectionList the suppliers
that deliver all the items of type B to the departments that also
sell all the items of typeN.CREATE VIEW v33a AS(SELECT deptname
FROM qdeptWHERE NOT EXISTS (SELECT * FROM qitemWHERE itemtype =
'N'AND NOT EXISTS (SELECT * FROM qsaleWHERE qsale.deptname =
qdept.deptnameAND qsale.itemname = qitem.itemname)));CREATE VIEW
v33b AS (SELECT deptname FROM qdept WHERE NOT EXISTS (SELECT * FROM
qitemWHERE itemtype = 'B' AND NOT EXISTS (SELECT * FROM qdel WHERE
qdel.deptname = qdept.deptname ANDqdel.itemname =
qitem.itemname)));SELECT splname FROM qsplWHERE NOT EXISTS (SELECT
* FROM qitemWHERE itemtype = 'B'AND NOT EXISTS (SELECT * FROM
qdelWHERE qdel.splno = qspl.splnoAND qdel.itemname =
qitem.itemnameAND EXISTS(SELECT * FROM v33aWHERE qdel.deptname =
v33a.deptname)AND EXISTSpdfcrowd.com open in browser PRO version
Are you a developer? Try out the HTML to PDF API(SELECT * FROM v33b
WHERE qdel.deptname = v33b.deptname)));34. An easy one COUNTList
the items delivered by exactly one supplier (i.e., list the items
always delivered by the same supplier).SELECT itemname FROM
qdelGROUP BY itemname HAVING COUNT(DISTINCT splno) = 1;35. The only
oneList the supplier AND the item, WHERE the supplier is the only
deliverer of some item.SELECT DISTINCT qspl.splno, splname,
itemnameFROM qspl, qdel del1WHERE qspl.splno = del1.splnoAND
itemname NOT IN(SELECT itemname FROM qdelWHERE qdel.splno < >
del1.splno);36. At least some numberList the suppliers that deliver
at least 10 items.SELECT qspl.splno, splname FROM qdel, qsplWHERE
qdel.splno = qspl.splnoGROUP BY qspl.splno, splnameHAVING
COUNT(DISTINCT qdel.itemname) > = 10;37. A three-table
joinpdfcrowd.com open in browser PRO version Are you a developer?
Try out the HTML to PDF APIFor each item, give its type, the
departments that sell the item, AND the floor location of
thesedepartments.SELECT qitem.itemname, itemtype, qdept.deptname,
deptfloorFROM qitem, qsale, qdeptWHERE qsale.itemname =
qitem.itemnameAND qsale.deptname = qdept.deptname;38. Using NOT IN
like NOT EXISTSList the departments for which each item delivered
to the department isdelivered to some otherdepartment as
well.SELECT DISTINCT deptname FROM qdel del1WHERE NOT EXISTS(SELECT
* FROM qdel del2WHERE del2.deptname = del1.deptnameAND itemname NOT
IN(SELECT itemname FROM qdel del3WHERE del3.deptname < >
del1.deptname));39. Minus after GROUP ByList each item delivered to
at least two departments by each supplier that delivers it.SELECT
DISTINCT itemname FROM qdelWHERE itemname NOT IN(SELECT itemname
FROM qdelGROUP BY itemname, splnoHAVING COUNT(DISTINCT deptname)
< 2);pdfcrowd.com open in browser PRO version Are you a
developer? Try out the HTML to PDF API40. Something to allList the
items that are delivered only by the suppliers that deliver
something to all the departments.SELECT DISTINCT itemname FROM qdel
del1WHERE NOT EXISTS(SELECT * FROM qdel del2WHERE del2.itemname =
del1.itemnameAND splno NOT IN(SELECT splno FROM qdelGROUP BY splno
HAVING COUNT(DISTINCT deptname) =(SELECT COUNT(*) FROM qdeptWHERE
deptname NOT IN ('Management','Marketing', 'Personnel',
'Accounting', 'Purchasing'))));41. Intersection (AND)List the items
delivered by Nepalese Corp. AND sold in the Navigation
department.SELECT DISTINCT itemname FROM qitemWHERE itemname
IN(SELECT itemname FROM qdel, qsplWHERE qdel.splno = qspl.splnoAND
splname = 'Nepalese corp.')AND itemname IN(SELECT itemname FROM
qsaleWHERE deptname = 'Navigation');42. Union (OR)pdfcrowd.com open
in browser PRO version Are you a developer? Try out the HTML to PDF
APIList the items delivered by Nepalese Corp. or sold in the
Navigation department.SELECT DISTINCT itemname FROM qitemWHERE
itemname IN(SELECT itemname FROM qdel, qsplWHERE qdel.splno =
qspl.splnoAND splname = 'Nepalese corp.')OR itemname IN(SELECT
itemname FROM qsaleWHERE deptname = 'Navigation');43.
Intersection/unionList the departments selling items of type E that
are delivered by Nepalese Corp. AND/or which are sold bythe
Navigation department.SELECT DISTINCT deptname FROM qsaleWHERE
itemname IN(SELECT qitem.itemname FROM qitem, qdel, qsplWHERE
qitem.itemname = qdel.itemnameAND qdel.splno = qspl.splnoAND
splname = 'Nepalese corp.'AND itemtype = 'e')or itemname in(SELECT
itemname FROM qsaleWHERE deptname = 'Navigation');44. Averaging
with a conditionFind the average salary of the employees in the
Clothes department.pdfcrowd.com open in browser PRO version Are you
a developer? Try out the HTML to PDF APISELECT AVG(empsalary) FROM
qempWHERE deptname = 'clothes';45. Averaging with groupingFind, for
each department, the average salary of the employees.SELECT
deptname, AVG(empsalary) FROM qempGROUP BY deptname;46. Average
with a join, condition, AND groupingFind, for each department on
the second floor, the average salary of the employees.SELECT
qdept.deptname, AVG(empsalary) FROM qemp, qdeptWHERE qemp.deptname
= qdept.deptnameAND deptfloor = 2GROUP BY qdept.deptname;47.
Averaging with multiple joinsFind, for each department that sells
items of type E, the average salary of the employees.SELECT
qdept.deptname, AVG(empsalary)FROM qemp, qdept, qsale, qitemWHERE
qemp.deptname = qdept.deptnameAND qdept.deptname =
qsale.deptnameAND qsale.itemname = qitem.itemnameAND itemtype =
'E'GROUP BY qdept.deptname;pdfcrowd.com open in browser PRO version
Are you a developer? Try out the HTML to PDF API48. Complex
countingWhat are the number of different items delivered by each
supplier that delivers to all departments?SELECT splname,
COUNT(DISTINCT itemname)FROM qdel del1, qsplWHERE del1.splno =
qspl.splnoAND NOT EXISTS(SELECT * FROM qdeptWHERE deptname NOT
IN(SELECT deptname FROM qdelWHERE qdel.splno = del1.splno)AND
deptname NOT IN('Management', 'Marketing', 'Personnel',
'Accounting', 'Purchasing'))GROUP BY splname;49. Summing with joins
AND conditionsFind the total number of items of type E sold by the
departments on thesecond floor.SELECT SUM(saleqty) FROM qitem,
qsale, qdeptWHERE qitem.itemname = qsale.itemnameAND qdept.deptname
= qsale.deptnameAND itemtype = 'E'AND deptfloor = 2;50. Summing
with joins, conditions, AND groupingFind, for each item, the total
quantity sold by the departments on the second floor.pdfcrowd.com
open in browser PRO version Are you a developer? Try out the HTML
to PDF APISELECT qitem.itemname, SUM(saleqty) FROM qitem, qsale,
qdeptWHERE qitem.itemname = qsale.itemnameAND qdept.deptname =
qsale.deptnameAND deptfloor = 2GROUP BY qitem.itemname;51. Advanced
summingList suppliers that deliver a total quantity of items of
types C AND N that is altogether greater than 100.SELECT
qdel.splno, splname FROM qspl, qdel, qitemWHERE qspl.splno =
qdel.splnoAND qitem.itemname = qdel.itemnameAND (itemtype = 'C' or
itemtype = 'N')GROUP BY qdel.splno, splname HAVING SUM(delqty) >
100;52. Comparing to the average with a joinList the employees in
the Accounting department AND the difference between their salaries
AND theaverage salary of the department.CREATE VIEW v52(deptname,
dpavgsal) ASSELECT deptname, AVG(empsalary) FROM qempGROUP BY
deptname;SELECT empfname, (empsalary - dpavgsal) FROM v52,
qempWHERE v52.deptname = qemp.deptnameAND qemp.deptname =
'Accounting';53. Comparing to the average with a
productpdfcrowd.com open in browser PRO version Are you a
developer? Try out the HTML to PDF APIList the employees in the
Accounting department AND the difference between their salaries AND
theaverage salary of all the departments.CREATE VIEW v53(allavgsal)
ASSELECT AVG(empsalary) FROM qemp;SELECT empfname, (empsalary -
allavgsal) FROM v53, qempWHERE deptname = 'Accounting';54.
Averaging with multiple groupingWhat is, for each supplier, the
average number of items per department that the supplier
delivers?SELECT qdel.splno, splname, deptname, AVG(delqty)FROM
qspl, qdelWHERE qspl.splno = qdel.splnoGROUP BY qdel.splno,
splname, deptname;55. More than the average with groupingFor each
department, find the average salary of the employees who earn more
than the average salary ofthe department.SELECT deptname,
AVG(empsalary) FROM qemp outtWHERE empsalary >(SELECT
AVG(empsalary) FROM qemp innWHERE outt.deptname =
inn.deptname)GROUP BY deptname;56. The simplest averagepdfcrowd.com
open in browser PRO version Are you a developer? Try out the HTML
to PDF APIGive the overall average of the salaries in all
departments.SELECT AVG(empsalary) FROM qemp;SELECT AVG(dpavgsal)
FROM v52;57. Difference from the averageList each employee's
salary, the average salary within that person's department, AND the
differencebetween the employees' salaries AND the average salary of
the department.SELECT empfname, empsalary,dpavgsal, (empsalary -
dpavgsal)FROM v52, qempWHERE v52.deptname = qemp.deptname;58.
Averaging with multiple joins, multiple grouping, AND a
conditionWhat is the average delivery quantity of items of type N
delivered by each company who delivers them?SELECT qdel.splno,
splname, qdel.itemname, AVG(delqty)FROM qdel, qspl, qitemWHERE
qdel.splno = qspl.splnoAND qdel.itemname = qitem.itemnameAND
itemtype = 'N'GROUP BY qdel.splno, splname, qdel.itemname;59.
Detailed averagingWhat is the average delivery quantity of items of
type N delivered by each supplier to each department(given that the
supplier delivers items of type N to the department)?pdfcrowd.com
open in browser PRO version Are you a developer? Try out the HTML
to PDF APISELECT qdel.splno, splname, deptname, qdel.itemname,
AVG(delqty)FROM qdel, qspl, qitemWHERE qdel.splno = qspl.splnoAND
qdel.itemname = qitem.itemnameAND itemtype = 'N'GROUP BY
qdel.splno, splname, deptname, qdel.itemname;60. Counting pairsWhat
is the number of supplier-department pairs in which the supplier
delivers at least one item of type Eto the department?CREATE VIEW
v60 AS(SELECT DISTINCT splno, deptname FROM qdel, qitemWHERE
qdel.itemname = qitem.itemnameAND itemtype = 'E' );SELECT COUNT(*)
FROM v60;61. No BooleansIs it true that all the departments that
sell items of type C are located on the third floor? (The result
can bea Boolean 1 or 0, meaning yes or no.)SELECT COUNT(*) FROM
qdeptWHERE deptfloor 3AND exists(SELECT * FROM qsale, qitemWHERE
qsale.itemname = qitem.itemnameAND qsale.deptname =
qdept.deptnamepdfcrowd.com open in browser PRO version Are you a
developer? Try out the HTML to PDF APIAND itemtype = 'C');SELECT
COUNT(*) FROM qdeptWHERE deptfloor = 3AND EXISTS(SELECT * FROM
qsale, qitemWHERE qsale.itemname = qitem.itemnameAND qsale.deptname
= qdept.deptname AND itemtype = 'C');This page is part of the
promotional and support material for Data Management (sixth
edition) byRichard T. Watson For questions and comments please
contact the authorDate revi sed: 22-Sep-2013
