CASE Expression : Case « Query « SQL Server / T-SQL Tutorial

SQL Server / T-SQL Tutorial
1. Query
2. Insert Delete Update
3. Table
4. Table Join
5. Data Types
6. Set Operations
7. Constraints
8. Subquery
9. Aggregate Functions
10. Date Functions
11. Math Functions
12. String Functions
13. Data Convert Functions
14. Analytical Functions
15. Sequence Indentity
16. View
17. Index
18. Cursor
19. Database
20. Transact SQL
21. Procedure Function
22. Trigger
23. Transaction
24. XML
25. System Functions
26. System Settings
27. System Tables Views
28. User Role
29. CLR
Java
Java Tutorial
Java Source Code / Java Documentation
Java Open Source
Jar File Download
Java Articles
Java Products
Java by API
Photoshop Tutorials
Maya Tutorials
Flash Tutorials
3ds-Max Tutorials
Illustrator Tutorials
GIMP Tutorials
C# / C Sharp
C# / CSharp Tutorial
C# / CSharp Open Source
ASP.Net
ASP.NET Tutorial
JavaScript DHTML
JavaScript Tutorial
JavaScript Reference
HTML / CSS
HTML CSS Reference
C / ANSI-C
C Tutorial
C++
C++ Tutorial
Ruby
PHP
Python
Python Tutorial
Python Open Source
SQL Server / T-SQL
Oracle PL / SQL
Oracle PL/SQL Tutorial
PostgreSQL
SQL / MySQL
MySQL Tutorial
VB.Net
VB.Net Tutorial
Flash / Flex / ActionScript
VBA / Excel / Access / Word
XML
XML Tutorial
Microsoft Office PowerPoint 2007 Tutorial
Microsoft Office Excel 2007 Tutorial
Microsoft Office Word 2007 Tutorial
SQL Server / T-SQL Tutorial » Query » Case 
1. 23. 4. CASE Expression
5>
6CREATE TABLE titles(
7>    title_id       varchar(20),
8>    title          varchar(80)       NOT NULL,
9>    type           char(12)          NOT NULL,
10>    pub_id         char(4)               NULL,
11>    price          money                 NULL,
12>    advance        money                 NULL,
13>    royalty        int                   NULL,
14>    ytd_sales      int                   NULL,
15>    notes          varchar(200)          NULL,
16>    pubdate        datetime          NOT NULL
17)
18> GO
1>
2insert titles values ('1''Secrets',   'popular_comp', '1389', $20.00, $8000.00, 104095,'Note 1','06/12/94')
3insert titles values ('2''The',       'business',     '1389', $19.99, $5000.00, 104095,'Note 2','06/12/91')
4insert titles values ('3''Emotional', 'psychology',   '0736', $7.99,  $4000.00, 103336,'Note 3','06/12/91')
5insert titles values ('4''Prolonged', 'psychology',   '0736', $19.99, $2000.00, 104072,'Note 4','06/12/91')
6insert titles values ('5''With',      'business',     '1389', $11.95, $5000.00, 103876,'Note 5','06/09/91')
7insert titles values ('6''Valley',    'mod_cook',     '0877', $19.99, $0.00,    122032,'Note 6','06/09/91')
8insert titles values ('7''Any?',      'trad_cook',    '0877', $14.99, $8000.00, 104095,'Note 7','06/12/91')
9insert titles values ('8''Fifty',     'trad_cook',    '0877', $11.95, $4000.00, 141509,'Note 8','06/12/91')
10> GO

(rows affected)

(rows affected)

(rows affected)

(rows affected)

(rows affected)

(rows affected)

(rows affected)

(rows affected)
1>
2>
3SELECT  title_id,
4>             CASE SUBSTRING(title_id,1,2)
5>                    WHEN 'BU' THEN 'Business'
6>                    WHEN 'MC' THEN 'Modern Cooking'
7>                    WHEN 'PC' THEN 'Popular Computing'
8>                    WHEN 'PS' THEN 'Psychology'
9>                    WHEN 'TC' THEN 'Traditional Cooking'
10>             END AS BookType
11FROM titles
12> GO
title_id             BookType
-------------------- -------------------
1                    NULL
2                    NULL
3                    NULL
4                    NULL
5                    NULL
6                    NULL
7                    NULL
8                    NULL

(rows affected)
1>
2> drop table titles;
3> GO
1>
1. 23. Case
1. 23. 1. The syntax pattern for case
1. 23. 2. The syntax of the searched CASE function
1. 23. 3. A Simple CASE
1. 23. 4. CASE Expression
1. 23. 5. Automatic Code Generation for CASE Expressions
1. 23. 6. Summarizing Data Using the CASE Expression
1. 23. 7. Using a CASE expression to sum sales by weekday.
1. 23. 8. Using the CASE Expression with Complex Conditions
1. 23. 9. Summarizing Data Using the Searched CASE Expression
1. 23. 10. A SELECT statement that uses a simple CASE function
1. 23. 11. A SELECT statement that uses a searchable CASE function
1. 23. 12. Searched CASE expression looks for the first expression that evaluates to true.
1. 23. 13. Update statement based on case condition
1. 23. 14. Case when else
1. 23. 15. Alias for case statement
1. 23. 16. Use two case statements in one select statement
1. 23. 17. Case then with query
1. 23. 18. Case with range
1. 23. 19. Doing a calculation in a Searched CASE
www.java2java.com | Contact Us
Copyright 2009 - 12 Demo Source and Support. All rights reserved.
All other trademarks are property of their respective owners.