SQL Server/T-SQL Tutorial/Data Types/decimal — различия между версиями
Admin (обсуждение | вклад) м (1 версия) |
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Текущая версия на 13:25, 26 мая 2010
Содержание
CAST(BillingTotal AS dec(12,2))
<source lang="sql">
5> create table Billings ( 6> BankerID INTEGER, 7> BillingNumber INTEGER, 8> BillingDate datetime, 9> BillingTotal INTEGER, 10> TermsID INTEGER, 11> BillingDueDate datetime , 12> PaymentTotal INTEGER, 13> CreditTotal INTEGER 14> 15> ); 16> 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> SELECT CAST(BillingTotal AS dec(12,2)) "YTD Sales" 3> FROM Billings 4> GO YTD Sales
165.00
165.00
165.00
165.00
165.00
165.00
165.00
165.00
165.00
165.00
(10 rows affected) 1> 2> 3> drop table Billings; 4> GO 1></source>
Convert DECIMAL(10,2) to varchar(10)
<source lang="sql">
4> CREATE TABLE employee( 5> id INTEGER NOT NULL PRIMARY KEY, 6> first_name VARCHAR(10), 7> last_name VARCHAR(10), 8> salary DECIMAL(10,2), 9> start_Date DATETIME, 10> region VARCHAR(10), 11> city VARCHAR(20), 12> managerid INTEGER 13> ); 14> GO 1> 2> INSERT INTO employee VALUES (1, "Jason" , "Martin", 5890,"2005-03-22","North","Vancouver",3); 3> GO (1 rows affected) 1> INSERT INTO employee VALUES (2, "Alison", "Mathews",4789,"2003-07-21","South","Utown",4); 2> GO (1 rows affected) 1> INSERT INTO employee VALUES (3, "James" , "Smith", 6678,"2001-12-01","North","Paris",5); 2> GO (1 rows affected) 1> INSERT INTO employee VALUES (4, "Celia" , "Rice", 5567,"2006-03-03","South","London",6); 2> GO (1 rows affected) 1> INSERT INTO employee VALUES (5, "Robert", "Black", 4467,"2004-07-02","East","Newton",7); 2> GO (1 rows affected) 1> INSERT INTO employee VALUES (6, "Linda" , "Green" , 6456,"2002-05-19","East","Calgary",8); 2> GO (1 rows affected) 1> INSERT INTO employee VALUES (7, "David" , "Larry", 5345,"2008-03-18","West","New York",9); 2> GO (1 rows affected) 1> INSERT INTO employee VALUES (8, "James" , "Cat", 4234,"2007-07-17","West","Regina",9); 2> GO (1 rows affected) 1> INSERT INTO employee VALUES (9, "Joan" , "Act", 6123,"2001-04-16","North","Toronto",10); 2> GO (1 rows affected) 1> 2> select * from employee; 3> GO id first_name last_name salary start_Date region city managerid
---------- ---------- ------------ ----------------------- ---------- -------------------- -----------
1 Jason Martin 5890.00 2005-03-22 00:00:00.000 North Vancouver 3
2 Alison Mathews 4789.00 2003-07-21 00:00:00.000 South Utown 4
3 James Smith 6678.00 2001-12-01 00:00:00.000 North Paris 5
4 Celia Rice 5567.00 2006-03-03 00:00:00.000 South London 6
5 Robert Black 4467.00 2004-07-02 00:00:00.000 East Newton 7
6 Linda Green 6456.00 2002-05-19 00:00:00.000 East Calgary 8
7 David Larry 5345.00 2008-03-18 00:00:00.000 West New York 9
8 James Cat 4234.00 2007-07-17 00:00:00.000 West Regina 9
9 Joan Act 6123.00 2001-04-16 00:00:00.000 North Toronto 10
(9 rows affected) 1> 2> 3> 4> SELECT ID,First_Name, "The total is $" + 5> CONVERT(varchar(10),salary) 6> FROM 7> employee 8> GO ID First_Name
---------- ------------------------
1 Jason The total is $5890.00
2 Alison The total is $4789.00
3 James The total is $6678.00
4 Celia The total is $5567.00
5 Robert The total is $4467.00
6 Linda The total is $6456.00
7 David The total is $5345.00
8 James The total is $4234.00
9 Joan The total is $6123.00
(9 rows affected) 1> 2> 3> drop table employee; 4> GO</source>
Exact Numbers
<source lang="sql">
6> Create table Patient (PatientId int, 7> FullName varchar(20), 8> Weight decimal(5,2), 9> Height decimal(5,2), 10> ADP smallint, 11> BDZ tinyint) 12> go 1> 2> --decimal constants do not need delimiters either: 3> 4> insert into Patient (PatientId, FullName, Weight, Height, ADP, BDZ) 5> values (834021, "Tom Jones", 89.5, 188.5, 450, 11) 6> GO (1 rows affected) 1> 2> select * from Patient; 3> GO PatientId FullName Weight Height ADP BDZ
-------------------- ------- ------- ------ ---
834021 Tom Jones 89.50 188.50 450 11
(1 rows affected) 1> 2> drop table Patient; 3> GO 1></source>
Use like to check DECIMAL after converting
<source lang="sql">
3> CREATE TABLE employee( 4> id INTEGER NOT NULL PRIMARY KEY, 5> first_name VARCHAR(10), 6> last_name VARCHAR(10), 7> salary DECIMAL(10,2), 8> start_Date DATETIME, 9> region VARCHAR(10), 10> city VARCHAR(20), 11> managerid INTEGER 12> ); 13> GO 1> INSERT INTO employee VALUES (1, "Jason" , "Martin", 5890,"2005-03-22","North","Vancouver",3); 2> GO (1 rows affected) 1> INSERT INTO employee VALUES (2, "Alison", "Mathews",4789,"2003-07-21","South","Utown",4); 2> GO (1 rows affected) 1> INSERT INTO employee VALUES (3, "James" , "Smith", 6678,"2001-12-01","North","Paris",5); 2> GO (1 rows affected) 1> INSERT INTO employee VALUES (4, "Celia" , "Rice", 5567,"2006-03-03","South","London",6); 2> GO (1 rows affected) 1> INSERT INTO employee VALUES (5, "Robert", "Black", 4467,"2004-07-02","East","Newton",7); 2> GO (1 rows affected) 1> INSERT INTO employee VALUES (6, "Linda" , "Green" , 6456,"2002-05-19","East","Calgary",8); 2> GO (1 rows affected) 1> INSERT INTO employee VALUES (7, "David" , "Larry", 5345,"2008-03-18","West","New York",9); 2> GO (1 rows affected) 1> INSERT INTO employee VALUES (8, "James" , "Cat", 4234,"2007-07-17","West","Regina",9); 2> GO (1 rows affected) 1> INSERT INTO employee VALUES (9, "Joan" , "Act", 6123,"2001-04-16","North","Toronto",10); 2> GO (1 rows affected) 1> 2> select * from employee; 3> GO id first_name last_name salary start_Date region city managerid
---------- ---------- ------------ ----------------------- ---------- -------------------- -----------
1 Jason Martin 5890.00 2005-03-22 00:00:00.000 North Vancouver 3
2 Alison Mathews 4789.00 2003-07-21 00:00:00.000 South Utown 4
3 James Smith 6678.00 2001-12-01 00:00:00.000 North Paris 5
4 Celia Rice 5567.00 2006-03-03 00:00:00.000 South London 6
5 Robert Black 4467.00 2004-07-02 00:00:00.000 East Newton 7
6 Linda Green 6456.00 2002-05-19 00:00:00.000 East Calgary 8
7 David Larry 5345.00 2008-03-18 00:00:00.000 West New York 9
8 James Cat 4234.00 2007-07-17 00:00:00.000 West Regina 9
9 Joan Act 6123.00 2001-04-16 00:00:00.000 North Toronto 10
(9 rows affected) 1> 2> 3> 4> SELECT ID, first_name 5> FROM Employee 6> WHERE CAST(Salary as varchar(10)) LIKE "5%" 7> GO ID first_name
----------
1 Jason
4 Celia
7 David
(3 rows affected) 1> 2> 3> drop table employee; 4> GO</source>
