Mega Code Archive
A query that uses a correlated subquery in its SELECT clause to retrieve the most recent Billing for each Banker
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4>
5>
6> create table Billings (
7> BankerID INTEGER,
8> BillingNumber INTEGER,
9> BillingDate datetime,
10> BillingTotal INTEGER,
11> TermsID INTEGER,
12> BillingDueDate datetime ,
13> PaymentTotal INTEGER,
14> CreditTotal INTEGER
15>
16> );
17> GO
1>
2> INSERT INTO Billings VALUES (1, 1, '2005-01-22', 165, 1,'2005-04-22',123,321);
3> GO
(1 rows affected)
1> INSERT INTO Billings VALUES (2, 2, '2001-02-21', 165, 1,'2002-02-22',123,321);
2> GO
(1 rows affected)
1> INSERT INTO Billings VALUES (3, 3, '2003-05-02', 165, 1,'2005-04-12',123,321);
2> GO
(1 rows affected)
1> INSERT INTO Billings VALUES (4, 4, '1999-03-12', 165, 1,'2005-04-18',123,321);
2> GO
(1 rows affected)
1> INSERT INTO Billings VALUES (5, 5, '2000-04-23', 165, 1,'2005-04-17',123,321);
2> GO
(1 rows affected)
1> INSERT INTO Billings VALUES (6, 6, '2001-06-14', 165, 1,'2005-04-18',123,321);
2> GO
(1 rows affected)
1> INSERT INTO Billings VALUES (7, 7, '2002-07-15', 165, 1,'2005-04-19',123,321);
2> GO
(1 rows affected)
1> INSERT INTO Billings VALUES (8, 8, '2003-08-16', 165, 1,'2005-04-20',123,321);
2> GO
(1 rows affected)
1> INSERT INTO Billings VALUES (9, 9, '2004-09-17', 165, 1,'2005-04-21',123,321);
2> GO
(1 rows affected)
1> INSERT INTO Billings VALUES (0, 0, '2005-10-18', 165, 1,'2005-04-22',123,321);
2> GO
(1 rows affected)
1>
2>
3>
4> create table Bankers(
5> BankerID Integer,
6> BankerName VARCHAR(20),
7> BankerContactLName VARCHAR(20),
8> BankerContactFName VARCHAR(20),
9> BankerCity VARCHAR(20),
10> BankerState VARCHAR(20),
11> BankerZipCode VARCHAR(20),
12> BankerPhone VARCHAR(20)
13> )
14> GO
1>
2> insert into Bankers values (1, 'ABC Inc.','Joe','Smith','Vancouver','BC','11111','111-111-1111');
3> GO
(1 rows affected)
1> insert into Bankers values (2, 'DEF Inc.','Red','Rice', 'New York', 'DE','22222','222-222-2222');
2> GO
(1 rows affected)
1> insert into Bankers values (3, 'HJI Inc.','Kit','Cat', 'Paris', 'CA','33333','333-333-3333');
2> GO
(1 rows affected)
1> insert into Bankers values (4, 'QWE Inc.','Git','Black','Regina', 'ER','44444','444-444-4444');
2> GO
(1 rows affected)
1> insert into Bankers values (5, 'RTY Inc.','Wil','Lee', 'Toronto', 'YU','55555','555-555-5555');
2> GO
(1 rows affected)
1> insert into Bankers values (6, 'YUI Inc.','Ted','Larry','Calgary', 'TY','66666','666-666-6666');
2> GO
(1 rows affected)
1> insert into Bankers values (7, 'OIP Inc.','Yam','Act', 'San Franc','FG','77777','777-777-7777');
2> GO
(1 rows affected)
1> insert into Bankers values (8, 'SAD Inc.','Hit','Eat', 'Orland', 'PO','88888','888-888-8888');
2> GO
(1 rows affected)
1> insert into Bankers values (9, 'DFG Inc.','Sad','Lee', 'Wisler', 'PL','99999','999-999-9999');
2> GO
(1 rows affected)
1> insert into Bankers values (0, 'GHJ Inc.','Bit','Lee', 'Ticker', 'MN','00000','000-000-0000');
2> GO
(1 rows affected)
1>
2>
3> SELECT DISTINCT BankerName,
4> (SELECT MAX(BillingDate) FROM Billings
5> WHERE Billings.BankerID = Bankers.BankerID) AS LatestInv
6> FROM Bankers
7> ORDER BY LatestInv DESC
8>
9>
10> drop table Billings;
11> drop table Bankers;
12> GO
BankerName LatestInv
-------------------- -----------------------
GHJ Inc. 2005-10-18 00:00:00.000
ABC Inc. 2005-01-22 00:00:00.000
DFG Inc. 2004-09-17 00:00:00.000
SAD Inc. 2003-08-16 00:00:00.000
HJI Inc. 2003-05-02 00:00:00.000
OIP Inc. 2002-07-15 00:00:00.000
YUI Inc. 2001-06-14 00:00:00.000
DEF Inc. 2001-02-21 00:00:00.000
RTY Inc. 2000-04-23 00:00:00.000
QWE Inc. 1999-03-12 00:00:00.000
(10 rows affected)
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