A SELECT statement that computes the age of a Billing with DATEDIFF : DATEDIFF « Date Functions « SQL Server / T-SQL Tutorial

1. SQL Server / T-SQL Tutorial
2. Date Functions
3. DATEDIFF

6>
7>
8> create table Billings (
9>     BankerID           INTEGER,
10>     BillingNumber      INTEGER,
11>     BillingDate        datetime,
12>     BillingTotal       INTEGER,
13>     TermsID            INTEGER,
14>     BillingDueDate     datetime ,
15>     PaymentTotal       INTEGER,
16>     CreditTotal        INTEGER
17>
18> );
19> 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>
5> SELECT BillingDate,
6>     GETDATE() AS 'Today''s Date',
7>     DATEDIFF(day, BillingDate, GETDATE()) AS Age
8> FROM Billings
9> GO
BillingDate             Today's Date            Age
----------------------- ----------------------- -----------
2005-01-22 00:00:00.000 2008-08-11 21:35:09.873        1297
2001-02-21 00:00:00.000 2008-08-11 21:35:09.873        2728
2003-05-02 00:00:00.000 2008-08-11 21:35:09.873        1928
1999-03-12 00:00:00.000 2008-08-11 21:35:09.873        3440
2000-04-23 00:00:00.000 2008-08-11 21:35:09.873        3032
2001-06-14 00:00:00.000 2008-08-11 21:35:09.873        2615
2002-07-15 00:00:00.000 2008-08-11 21:35:09.873        2219
2003-08-16 00:00:00.000 2008-08-11 21:35:09.873        1822
2004-09-17 00:00:00.000 2008-08-11 21:35:09.873        1424
2005-10-18 00:00:00.000 2008-08-11 21:35:09.873        1028

(10 rows affected)
1>
2> drop table Billings;
3> GO