The syntax of the CAST function: CAST(expression AS data_type) : CAST « Data Convert Functions « SQL Server / T-SQL Tutorial






A SELECT statement that uses the CAST function

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> create table Bankers(
4>    BankerID             Integer,
5>    BankerName           VARCHAR(20),
6>    BankerContactLName   VARCHAR(20),
7>    BankerContactFName   VARCHAR(20),
8>    BankerCity           VARCHAR(20),
9>    BankerState          VARCHAR(20),
10>    BankerZipCode        VARCHAR(20),
11>    BankerPhone          VARCHAR(20)
12> )
13> 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 BillingDate, BillingTotal,
4>     CAST(BillingDate AS varchar) AS varcharDate,
5>     CAST(BillingTotal AS int) AS integerTotal,
6>     CAST(BillingTotal AS varchar) AS varcharTotal
7> FROM Billings
8> GO
BillingDate             BillingTotal varcharDate                    integerTotal varcharTotal
----------------------- ------------ ------------------------------ ------------ ------------------------------
2005-01-22 00:00:00.000          165 Jan 22 2005 12:00AM                     165 165
2001-02-21 00:00:00.000          165 Feb 21 2001 12:00AM                     165 165
2003-05-02 00:00:00.000          165 May  2 2003 12:00AM                     165 165
1999-03-12 00:00:00.000          165 Mar 12 1999 12:00AM                     165 165
2000-04-23 00:00:00.000          165 Apr 23 2000 12:00AM                     165 165
2001-06-14 00:00:00.000          165 Jun 14 2001 12:00AM                     165 165
2002-07-15 00:00:00.000          165 Jul 15 2002 12:00AM                     165 165
2003-08-16 00:00:00.000          165 Aug 16 2003 12:00AM                     165 165
2004-09-17 00:00:00.000          165 Sep 17 2004 12:00AM                     165 165
2005-10-18 00:00:00.000          165 Oct 18 2005 12:00AM                     165 165

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








13.1.CAST
13.1.1.The syntax of the CAST function: CAST(expression AS data_type)
13.1.2.select CAST('2002-09-30 11:35:00' AS smalldatetime) + 1
13.1.3.select CAST('2002-09-30 11:35:00' AS smalldatetime) - 1 (Minus)
13.1.4.select CAST(CAST('2002-09-30' AS datetime) - CAST('2001-12-01' AS datetime) AS int)
13.1.5.Data type conversion can be performed using the CAST() and CONVERT() functions.
13.1.6.SELECT CAST('123.4' AS Decimal)
13.1.7.Use cast function in dynamic sql