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-- Create Tables -- Create X Table CREATE TABLE X ( XID int identity, XNumber varchar(100) not null, XDescription varchar(100) not null, XCode varchar(100) not null, VIT varchar(100) not null, XLocation varchar(100) not null, CONSTRAINT PK_X PRIMARY KEY (XID), CONSTRAINT U1_X UNIQUE (XNumber), CONSTRAINT U2_X UNIQUE (XCode) ) -- Create Y Table CREATE TABLE Y ( YID int identity, YNumber varchar(100) not null, YDescription varchar(100) not null, YDate datetime not null default GetDate(), CONSTRAINT PK_Y PRIMARY KEY(YID), CONSTRAINT U1_Y UNIQUE(YNumber) ) -- Create XY Table CREATE TABLE XY ( XYID int identity, XID int not null, YID int not null, CONSTRAINT PK_XY PRIMARY KEY(XYID), CONSTRAINT FK1_XY FOREIGN KEY(XID) REFERENCES X(XID), CONSTRAINT FK2_XY FOREIGN KEY(YID) REFERENCES Y(YID) ) -- Insert Values in X insert into X (XNumber, XDescription, XCode, VIT, XLocation) values ('ASDLKVNAEQRIUNBVLAXKD', 'THDSDF', 'Violet', 2, 'FROP'); insert into X (XNumber, XDescription, XCode, VIT, XLocation) values ('GBOGJMBNNUTHDFHJG', 'TFGSDFG', 'Pink', 20, 'DOOO'); insert into X (XNumber, XDescription, XCode, VIT, XLocation) values ('GKHL', 'SDFGSDF', 'Yellow', 21, 'DSUIO'); insert into X (XNumber, XDescription, XCode, VIT, XLocation) values ('DELKMDTKJGBT', 'HNYDGH', 'Green', 20, 'KABBA'); insert into X (XNumber, XDescription, XCode, VIT, XLocation) values ('WRTOUBHNPSDFIVKM', 'OYIU', 'Aquamarine', 19, 'SANFRIO'); insert into X (XNumber, XDescription, XCode, VIT, XLocation) values ('FGBKMOSEKFVKF', 'DCGTH', 'Red', 8, 'BOB'); insert into X (XNumber, XDescription, XCode, VIT, XLocation) values ('GBIMGIK', 'FTGHJM', 'Mauv', 10, 'CHURCH'); insert into X (XNumber, XDescription, XCode, VIT, XLocation) values ('JLJLH', 'FCTGHKII', 'Goldenrod', 5, 'ZAN'); insert into X (XNumber, XDescription, XCode, VIT, XLocation) values ('YITORKRKG', 'ITRTGJJ', 'Maroon', 7, 'ZERR'); insert into X (XNumber, XDescription, XCode, VIT, XLocation) values ('QWYTWEGD', 'PRTHJHJUKKM', 'Khaki', 9, 'ZAB'); -- Insert Values in Y insert into Y (YNumber, YDescription, YDate) values ('8e3ac22d07ee88efa9e91fc0830cdee0f1263d82', 'POSTY', '12/22/2019'); insert into Y (YNumber, YDescription, YDate) values ('735c653fec21726598b47b8c59f7b4a4a8ee3618', 'PUTH 3500', '1/14/2021'); insert into Y (YNumber, YDescription, YDate) values ('ef3b991a287db1c3bfd9c568972bc35e5c7c6218', 'BTS', '4/4/2021'); insert into Y (YNumber, YDescription, YDate) values ('a45cec89ba00b77439802b342ce16be4c8ddbee4', 'JLO', '12/3/2019'); insert into Y (YNumber, YDescription, YDate) values ('747a92666a65947e9f03fd7cf7ad55fdd803a2ab', 'JT', '5/1/2020'); insert into Y (YNumber, YDescription, YDate) values ('19a5e1d0c75abea249e50997dd1252285c36404c', 'M5', '1/13/2022'); insert into Y (YNumber, YDescription, YDate) values ('1fe285c2249937f9c5c7608f46be736840ef6007', 'Laroi', '12/12/2021'); insert into Y (YNumber, YDescription, YDate) values ('e6d3614571648dceae07a4813824904f70bc4bef', 'Biebs', '5/1/2022'); insert into Y (YNumber, YDescription, YDate) values ('2a7401fd3f68e09f45564ff29fc4b16c1f7e88ba', 'The Weeknd', '2/21/2022'); insert into Y (YNumber, YDescription, YDate) values ('20a451d4be1894e8f585af47807df6cbe55edfe4', 'Taylor', '2/1/2022'); -- Insert Values in XY insert into XY (XID, YID) values (2, 6); insert into XY (XID, YID) values (6, 3); insert into XY (XID, YID) values (3, 3); insert into XY (XID, YID) values (9, 8); insert into XY (XID, YID) values (5, 7); insert into XY (XID, YID) values (4, 1); insert into XY (XID, YID) values (3, 7); insert into XY (XID, YID) values (3, 2); insert into XY (XID, YID) values (5, 9); insert into XY (XID, YID) values (6, 5);
30 rows affected
WITH tmp AS ( SELECT X.XNumber, COUNT(Y.YNumber) AS YFreq, RANK() OVER(ORDER BY COUNT(Y.YNumber) DESC) AS rnk FROM XY JOIN X ON X.XID = XY.XID JOIN Y ON Y.YID = XY.YID GROUP BY X.XNumber ) SELECT tmp.* FROM tmp WHERE rnk = 1
XNumber
YFreq
rnk
GKHL
3
1