References & SQL Tips
Speaker: David Larsen (dlarsen@lagoonpark.com), Software Engineer at Lagoon Corporation
Topic: SQL Tips and Techniques on the IBM i
Date: Wednesday, January 14th, 2015
Time: 11:00 a.m. – 12:00 noon
Location: Murray City Offices (City Council Chambers), 5025 South State Street,
Murray, Utah.
Modernizing IBM i Applications from the Database up to the User Interface and Everything in
Between sg248185.pdf Read and Study Chapters 8 and 9.
RCAC for DB2 for i
http://www.redbooks.ibm.com/redpieces/pdfs/redp5110.pdf
IBM i Version 7.2 Database DB2 for i SQL Reference - 1,596 pages
http://www-01.ibm.com/support/knowledgecenter/api/content/ssw_ibm_i_72/db2/rbafzpdf.pdf
IBM i Version 7.2 Database SQL programming
http://www-01.ibm.com/support/knowledgecenter/api/content/ssw_ibm_i_72/sqlp/rbafypdf.pdf
http://iprodeveloper.com/database/teach-your-old-db2-new-tricks
http://iprodeveloper.com/sql/simplify-dds-sql-conversion
Replacing a DDS Physical File with an SQL Table
http://iprodeveloper.com/database/replacing-dds-physical-file-sql-table
Database Harmony: "Traditional" and SQL Coexistence
http://iprodeveloper.com/rpg-programming/database-harmony-traditional-and-sql-coexistence
More SQL and dates part I
http://www.rpgpgm.com/2013/09/more-sql-and-dates-part-i.html
http://www.rpgpgm.com/2013/09/more-sql-and-dates-part-ii.html
http://www.rpgpgm.com/2014/09/ftp-i-to-i-part-3.html
Using Date Tools for SQL and Excel
http://iprodeveloper.com/database/using-date-tools-sql-and-excel
Get Your SQL Surge On
http://event.on24.com/eventRegistration/EventLobbyServlet?target=lobby.jsp&eventid=835928&sessionid=1&partnerr
ef=thankyous&key=6AA27A32AF883CFE9D34923719F7148F&eventuserid=103379436
President – Gary Larson
Vice President – Matt Kingdon
Secretary – Joe Wood
Treasurer – Mike Meservy
Utah IBM i Professionals Association – 2014-2015
(P.O. Box 571394 – Murray, UT 84157)
http://www.uiipa.org
Procedures, and Functions, and Catalogs! Oh My!
http://www.mcpressonline.com/programming/sql/procedures-and-functions-and-catalogs-oh-my.html
In 7.1 SQLRPGLE Can Read Stored Procedure Result Sets
From <http://iprodeveloper.com/sql/71-sqlrpgle-can-read-stored-procedure-result-sets>
IBM DB2 for i Advanced SQL Programming - IBM Training From
<http://www.youtube.com/watch?v=aBzZXMrXVGY>
Coding SQL Routines on the Fast Track
From <http://iprodeveloper.com/database/coding-sql-routines-fast-track>
SQL's Other Fetch Options
From <http://www.itjungle.com/fhg/fhg051309-story02.html>
Good stuff! Set eof or bof. Sequential and random reads
Creating a SQL table "on the fly"
From <http://www.rpgpgm.com/2014/01/creating-sql-table-on-fly.html>
Resetting the identity column in a SQL table
http://www.rpgpgm.com/2014/06/resetting-identity-column-in-sql-table.html
Complex Joins in SQL
http://www.toadworld.com/platforms/ibmdb2/w/wiki/7755.complex-sql-guidelines.aspx
Embedding SQL in RPG IV--Episode II
http://www.itjungle.com/fhg/fhg082405-story01.html
SQL Functions Extend RPG
http://iprodeveloper.com/rpg-programming/sql-functions-extend-rpg
COMPARE TWO TABLES and get only unmatched records
To compare all the columns/rows in TABLE1 to those in TABLE2 you can use the EXCEPT function as follows:
SELECT * FROM TABLE1
EXCEPT
SELECT * FROM TABLE2;
The above SQL will display all rows from TABLE1 that don’t match or exist on TABLE2. The number of columns
being compared – and their data type – have to match and you can’t compare certain column types (such as
CLOB/BLOB/XML). The nice thing about this, is the EXCEPT function takes care of all the comparison details for
you unlike when trying to use the WHERE NOT EXISTS clause.
From <http://jmerrell.com/2011/06/01/db2-except-sql-function/>
Create Database Files from SQL Queries
From <http://www.itjungle.com/fhg/fhg111506-story01.html>
REPLACE to Replace Characters in a String
From <http://www.itjungle.com/fhg/fhg072711-story01.html>
SELECT name, company, REPLACE(phone, '-', '') AS phone
FROM namemstr
Create or Replace a File
President – Gary Larson
Vice President – Matt Kingdon
Secretary – Joe Wood
Treasurer – Mike Meservy
Utah IBM i Professionals Association – 2014-2015
(P.O. Box 571394 – Murray, UT 84157)
http://www.uiipa.org
http://iprodeveloper.com/database/use-sql-create-or-replace-improve-db2-i-object-management
A Match Made in SQL
From <http://iprodeveloper.com/sql/match-made-sql>
Embedding SQL in RPGLE
http://www.penton.com/webcasts/Day2Session3-IntrotoEmbeddedSQL_Cruikshank.pdf
How to use DB2's cross-reference files to help
http://search400.techtarget.com/tip/How-to-use-DB2s-cross-reference-files-to-help-manage-your-database-Part-I>
SQL Arrays in DB2 for i 7.1
http://ibmsystemsmag.com/ibmi/administrator/db2/SQL-Arrays-in-DB2-for-i-7-1/
Free Format SQLRPGLE Shell Program 1 Author: Lionel Halvorsen
http://www.ilerpgprogramming.com/2010/02/free-format-sqlrpgle-shell-program-1.html
Free Format SQLRPGLE Shell Program: part 2
Author: Lionel Halvorsen Feb 26, 2010
<http://www.ilerpgprogramming.com/2010/02/free-format-sqlrpgle-shell-program-part.html>
Free Format SQLRPGLE Shell Program: part 3
Author: Lionel Halvorsen Mar 1, 2010
From <http://www.ilerpgprogramming.com/2010/03/free-format-sqlrpgle-shell-program-part.html>
Comparing SQL DDL with DDS for creating files.
From <http://www.ilerpgprogramming.com/2009/05/comparing-sql-ddl-with-dds-for-creating.html>
SQL in free format RPG
Do you use SQL and free format RPG independently but haven't really put the two together yet? If so then this article is
for you.
Executing SQL statements in free format RPG may be a lot easier than you think. Doing so can streamline and
speed up your legacy code.
From <http://www.ilerpgprogramming.com/2009/04/sql-in-free-format-rpg.html>
Run SQL statements automatically with RUNSQLSTM
STRSQL is a powerful and useful interactive tool (in the right hands) but it can be cumbersome to retrieve previous
SQL statements, modify them and then run them again all the while hoping there are no typos. If you find yourself
frequently entering the same SQL commands why not save them to a text file and automate the process?
I like to save the SQL statements in a source file named qtxtsrc. Once saved the SQL can be executed from a CL
containing the RUNSQLSTM command.
In this example two inventory file field definitions were reversed during an upgrade and the data had to be swapped
(mapped correctly) during the process. This can be accomplished with one SQL statement. Note that there is no need
for messy work fields that might otherwise be used when coding the same solution in RPG.
Step 1. Create the text type source member.
Contents of the source member sqlfswap (saved as a text file):
update datalib/invenpf set field1 = field2, field2 = field1
President – Gary Larson
Vice President – Matt Kingdon
Secretary – Joe Wood
Treasurer – Mike Meservy
Utah IBM i Professionals Association – 2014-2015
(P.O. Box 571394 – Murray, UT 84157)
http://www.uiipa.org
Step 2. Create CL member sqlfswapcl:
ADDLIBLE mylib
MONMSG msgid(cpf0000)
RUNSQLSTM srcfile(mylib/qtxtsrc) srcmbr(sqlfswap)
MONMSG msgid(cpf0000)
endpgm
Step 3. Run the CL and check your results.
Of course the CL can be set up on the job scheduler (wrkjobscde) if your application needs to be run automatically at
specified intervals and multiple sql statements can be added into the same text source member.
From <http://www.ilerpgprogramming.com/2009/02/run-sql-statements-automatically-with.html>
Yet another reason why to work with real date and time values:
SQL provides a lot of scalar functions for date and time calculation that can be easily used in RPG. Example:
/Free
Exec SQL Set :MyWeekIso = Week_ISO(:MyDate);
Dsply MyWeekIso;
Exec SQL Set :MyMonthEnd = Last_Day(:MyDate);
Exec SQL Set :NextMonday = Next_Day(:MyDate, 'Monday');
Exec SQL Set :IsWeekEnd = Case When DayOfWeek_ISO >= 6 Then '1' Else '0' End;
/End-Free
Those functions only work with real date/time fields. SQL does not play very nicely with numeric date/time fields.
From <http://ibmsystemsmag.blogs.com/idevelop/2014/07/rpg-speed-dating-.html>
iProdeveloper – PowerPack – Turbocharge IBM i with SQL.
http://iprodeveloper.com/power-packs/turbocharge-ibm-i-sql-power-pack
Simplify DDS to SQL Conversion
TR7 adds support for keyed file objects to the Generate SQL utility
http://iprodeveloper.com/sql/simplify-dds-sql-conversion
Achieve improved database interoperability with SQL and RDB aliases
http://www.ibm.com/developerworks/ibmi/library/i-improved-database-interoperability-sqlrdb/index.html?ca=drsSelected common SQL features for developers of portable DB2 applications
http://www.ibm.com/developerworks/data/library/techarticle/db2common/previouslevel3.html?ca=drsTechTip: Direct SQL Control of System Names
http://www.mcpressonline.com/sql/techtip-direct-sql-control-of-system-names.html
Coding SQL statements in ILE RPG applications
http://www-01.ibm.com/support/knowledgecenter/api/content/ssw_ibm_i_71/rzajp/rzajprpgi.htm
You can generate the SQL to create a collection (library) and all physical and logical indexes in the selected library
needed with System I Navigator. Take the option to create the output to a source file member. Then use RUNSQLSTM
to execute the statements from that member to create your new collection. ATTENTION: You will need to put the
correct right margin length on RUNSQLSTM or it will not work (EG default = MARGINS(80); otherwise =
MARGINS(100)
President – Gary Larson
Vice President – Matt Kingdon
Secretary – Joe Wood
Treasurer – Mike Meservy
Utah IBM i Professionals Association – 2014-2015
(P.O. Box 571394 – Murray, UT 84157)
http://www.uiipa.org
Cast Your Data Conversion Troubles Away
If you have different CCSIDs for tables or columns on your system
http://www.itjungle.com/mpo/mpo091103-story03.html
SQL Functions You Didn't Know You Had, Part 1
http://www.itjungle.com/fhg/fhg102214-story01.html
SQL Functions You Didn't Know You Had, Part 2
http://www.itjungle.com/fhg/fhg111214-story02.html>
IBM I Links you will need
http://ibmsystemsmag.com/Blogs/You-and-i/December-2014/IBM-i-Links-You-Need/?utm_campaign=ibmenews&utm_medium=email&utm_source=ibmi-jan14-2015-newver&utm_content=blog-youandi-title
Paging Cursors
http://www.itjungle.com/fhg/fhg102214-story02.html
SQL UNION to get subtotals
http://search400.techtarget.com/tip/SQL-UNION-to-get-subtotals
SELECT Company, Region, District, ' ', COUNT(*)
FROM StoreTbl
GROUP BY Company, Region, District
UNION SELECT Company, Region, 999,
'Region ' || DIGITS(Region), COUNT(*)
FROM StoreTbl
GROUP BY Company, Region
UNION SELECT Company, 999
999, 'Company' || Company, count(*)
from StoreTbl
group by Company
order by Company
IBM DB2 for i: Tips
Frequently asked questions: Improving performance with SQL packages
http://www-03.ibm.com/systems/power/software/i/db2/support/tips/sqlperffaq.html#header_1
A Concise Guide to SQL Triggers
http://iprodeveloper.com/database/concise-guide-sql-triggers
President – Gary Larson
Vice President – Matt Kingdon
Secretary – Joe Wood
Treasurer – Mike Meservy
Utah IBM i Professionals Association – 2014-2015
(P.O. Box 571394 – Murray, UT 84157)
http://www.uiipa.org
Education
www.w3schools.com
www.codeacademy.com
www.udemy.com
www.edx.com
www.php.net
www.youtube.com
References
Database Embedded Programming
http://www-01.ibm.com/support/knowledgecenter/api/content/nl/en-us/ssw_ibm_i_72/rzajp/rzajppdf.pdf
DDS and SQL - The Winning Combination for DB2 for i: White Paper Download Link
http://www-304.ibm.com/partnerworld/wps/servlet/ContentHandler/whitepaper/ibmi/db2/sql
IBM i Database SQL Programming 7.1 rbafy
http://www-01.ibm.com/support/knowledgecenter/api/content/nl/en-us/ssw_ibm_i_71/sqlp/rbafy.pdf
DB2 for I SQL Reference Manual
http://www-01.ibm.com/support/knowledgecenter/ssw_ibm_i_72/db2/rbafzpdf.pdf?lang=en-us
Improving SQL procedure performance by Kent Milligan
http://www304.ibm.com/partnerworld/wps/servlet/ContentHandler/whitepaper/ibmi/sql_sql_v6r1/procedure
Moving From OPNQRYF to SQL
http://www304.ibm.com/partnerworld/wps/servlet/ContentHandler/whitepaper/i5os/OPNQRYF_SQL/move?pageI
d=pw.sellingresources
Stored Procedures, Triggers, and User-Defined Functions on DB2 Universal Database for iSeries
http://www.redbooks.ibm.com/redbooks.nsf/RedbookAbstracts/sg246503.html?Open
Using SQL views and stored procedures with DB2 Web Query
http://www-304.ibm.com/partnerworld/wps/servlet/ContentHandler/whitepaper/i5os/db2_sql/security
President – Gary Larson
Vice President – Matt Kingdon
Secretary – Joe Wood
Treasurer – Mike Meservy
Utah IBM i Professionals Association – 2014-2015
(P.O. Box 571394 – Murray, UT 84157)
http://www.uiipa.org