Changing Character Values to Proper Case with user-defined functions : Utility function « Procedure Function « SQL Server / T-SQL Tutorial

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SQL Server / T-SQL Tutorial » Procedure Function » Utility function 
21. 6. 5. Changing Character Values to Proper Case with user-defined functions
3>
4>
5CREATE TABLE employee(
6>    id          INTEGER NOT NULL PRIMARY KEY,
7>    first_name  VARCHAR(10),
8>    last_name   VARCHAR(10),
9>    salary      DECIMAL(10,2),
10>    start_Date  DATETIME,
11>    region      VARCHAR(10),
12>    city        VARCHAR(20),
13>    managerid   INTEGER
14);
15> GO
1INSERT INTO employee VALUES (1'Jason' ,  'Martin', 5890,'2005-03-22','North','Vancouver',3);
2> GO

(rows affected)
1INSERT INTO employee VALUES (2'Alison',  'Mathews',4789,'2003-07-21','South','Utown',4);
2> GO

(rows affected)
1INSERT INTO employee VALUES (3'James' ,  'Smith',  6678,'2001-12-01','North','Paris',5);
2> GO

(rows affected)
1INSERT INTO employee VALUES (4'Celia' ,  'Rice',   5567,'2006-03-03','South','London',6);
2> GO

(rows affected)
1INSERT INTO employee VALUES (5'Robert',  'Black',  4467,'2004-07-02','East','Newton',7);
2> GO

(rows affected)
1INSERT INTO employee VALUES (6'Linda' ,  'Green' , 6456,'2002-05-19','East','Calgary',8);
2> GO

(rows affected)
1INSERT INTO employee VALUES (7'David' ,  'Larry',  5345,'2008-03-18','West','New York',9);
2> GO

(rows affected)
1INSERT INTO employee VALUES (8'James' ,  'Cat',    4234,'2007-07-17','West','Regina',9);
2> GO

(rows affected)
1INSERT INTO employee VALUES (9'Joan'  ,  'Act',    6123,'2001-04-16','North','Toronto',10);
2> GO

(rows affected)
1>
2select from employee;
3> GO
id          first_name last_name  salary       start_Date              region     city                 managerid
----------- ---------- ---------- ------------ ----------------------- ---------- -------------------- -----------
          Jason      Martin          5890.00 2005-03-22 00:00:00.000 North      Vancouver                      3
          Alison     Mathews         4789.00 2003-07-21 00:00:00.000 South      Utown                          4
          James      Smith           6678.00 2001-12-01 00:00:00.000 North      Paris                          5
          Celia      Rice            5567.00 2006-03-03 00:00:00.000 South      London                         6
          Robert     Black           4467.00 2004-07-02 00:00:00.000 East       Newton                         7
          Linda      Green           6456.00 2002-05-19 00:00:00.000 East       Calgary                        8
          David      Larry           5345.00 2008-03-18 00:00:00.000 West       New York                       9
          James      Cat             4234.00 2007-07-17 00:00:00.000 West       Regina                         9
          Joan       Act             6123.00 2001-04-16 00:00:00.000 North      Toronto                       10

(rows affected)
1>
2>
3CREATE FUNCTION dbo.udf_ProperCase(@UnCased varchar(max))
4> RETURNS varchar(max)
5> AS
6BEGIN
7>     SET @UnCased = LOWER(@UnCased)
8>     DECLARE @C int
9>     SET @C = ASCII('a')
10>     WHILE @C <= ASCII('z')
11>         BEGIN
12>             SET @UnCased = REPLACE@UnCased, ' ' + CHAR(@C)' ' + CHAR(@C-32))
13>             SET @C = @C + 1
14>         END
15>     SET @UnCased = CHAR(ASCII(LEFT(@UnCased, 1))-32+ RIGHT(@UnCased,LEN(@UnCased)-1)
16>     RETURN @UnCased
17END
18> GO
1>
2SELECT dbo.udf_ProperCase(first_name)
3FROM employee
4> GO



------------------------------------------------------------------------------------------------------------------------
------------------------------------------------------------------------------------------------------------------------
----------------
Jason


Alison


James


Celia


Robert


Linda


David


James


Joan



(rows affected)
1>
2> drop function dbo.udf_ProperCase
3> GO
1> drop table employee;
2> GO
1> --Reference from:
2> --SQL Server 2005 T-SQL Recipes A Problem-Solution Approach
3>
21. 6. Utility function
21. 6. 1. Scalar Functions
21. 6. 2. Format a date
21. 6. 3. linear_max() Scalar Function
21. 6. 4. The linear_min Scalar Function
21. 6. 5. Changing Character Values to Proper Case with user-defined functions
21. 6. 6. if an int odd
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