1. DB2 for OS/390 Fundamentals

3. Introduction to DB2 Universal Database

5. A brief DB2 History 1983 DB2 v1 ships 1993 DB2 for OS/2 and Aix 1994 DB2 for MVS v4 introduces Data Sharing 1996 DB2 UDB - multimedia, web-ready, cross-platform (non-mainframe) 1999 DB2 UDB for OS/390 (v6.1) 2001 DB2 UDB for OS/390 and z/OS (v7.1) 2004 DB2 UDB for z/OS (v8.1) 2004 DB2 UDB for LUW (v8.2)

6. The Guts of DB2 Directory Catalog Tables Logs BSDS DB2 User Thread EDM Pool Sort Pool Buffer Pools RID Pool Temporary Database Working Storage Program Logic

7. The Guts of DB2 Address Space Name Functions DBAS Database Services Address Space SSAS System Services Address Space IRLM Intersystem Resource Lock Manager DDF Distributed Data Facility SPAS Stored Procedure Address Space(s)

8. Threads DB2 CICS Programs DB2 Utilities TSO Online Programs TSO Batch Programs QMF/DB2I (SPUFI) thread threads thread thread thread Distributed Programs thread

9. Attachment Facilities DB2 TSO Address Space DSN Processor ISPF DB2I SPUFI QMF Rexx

12. SQL SQL DCL DDL DML GRANT REVOKE CREATE ALTER DROP SELECT UPDATE INSERT DELETE

13. Results Sets DB2 Request sent to database Multiple rows returned as a results set

14. Authorities SYSADM Systems Administrator Can do anything to everything DBADM Database Administrator Can do anything to a database User-based Select, Update, Insert, Delete access on permissions tables; Execute, Bind access on packages; utilities/operations upon objects. SYSMAINT/SYSCTRL Other administrative DBMAINT/DBCTRL functions in DB2 }{

15. DB2 Objects STOGROUP DATABASE TABLESPACE TABLE VIEW INDEX ALIAS SYNONYM COLUMN

16. DB2’s VSAM data sets M enu O ptions V iew U tilities C ompilers H elp ----------------------------------------------------------------------------- DSLIST - Data Sets Matching FIGDB2.DSNDBC.DFIGE0H.*ABORT* Row 1 of 6 Command ===> Scroll ===> CSR Command - Enter "/" to select action Tracks %Used XT Device ----------------------------------------------------------------------------- FIGDB2.DSNDBC.DFIGE0H.SABORT.I0001.A001 FIGDB2.DSNDBD.DFIGE0H.SABORT.I0001.A001 1950 ? 31 3390 FIGDB2.DSNDBC.DFIGE0H.XABORT0.I0001.A001 FIGDB2.DSNDBD.DFIGE0H.XABORT0.I0001.A001 120 ? 6 3390 FIGDB2.DSNDBC.DFIGE0H.IABORT1.I0001.A001 FIGDB2.DSNDBD.DFIGE0H.IABORT1.I0001.A001 16 ? 15 3390 *************************** End of Data Set list **************************** Partition number Tablespace/Index name Database name High-level qualifier

18. Tables Rows Columns

20. Data types SMALLINT/INTEGER CHARACTER/VARCHAR GRAPHIC/VARGRAPHIC/DBCLOB CHARACTER LARGE OBJECT/CLOB BINARY LARGE OBJECT/BLOB DECIMAL/NUMERIC FLOAT/REAL/DOUBLE DATE TIME TIMESTAMP ROWID

21. User-Defined Data types The user-defined DISTINCT TYPE is based on one of the previous basic data types. E.g. CREATE DISTINCT TYPE AUDIO AS BLOB (1M); CREATE DISTINCT TYPE VIDEO AS BLOB (1M); Then, your CREATE TABLE statement might look like this: CREATE TABLE VIDEO_CATALOG (VIDEO_NUMBER CHAR(6) NOT NULL, VIDEO_SOUND AUDIO, VIDEO_PICS VIDEO, ROW_ID ROWID NOT NULL GENERATED ALWAYS);

24. Stored Procedures Calling Program MVS Schedule SP SELECT INSERT UPDATE DELETE DB2 Start Proc SELECT INSERT UPDATE DELETE End Proc SPAS Call Results

26. Check Constraints Data value restrictions on the contents of a column. EXTN CHAR(4) CONSTRAINT NUMBER CHECK (EXTN BETWEEN ‘0000’ AND ‘9999’) CONSTRAINT BYPASS CHECK(BYPASS IN ('Y', 'N') AND (BYPASS = 'N' OR (BYPASS = 'Y’ AND REASON IS NOT NULL)))

27. Triggers CREATE TRIGGER UPD_SALARY BEFORE UPDATE OF SALARY ON EMP FOR EACH ROW MODE DB2SQL WHEN (NEW.SALARY>(OLD.SALARY*1.5)) BEGIN ATOMIC SIGNAL SQLSTATE ‘75001’ (‘Raise exceeds 50%’); END; CREATE TRIGGER RISK.GRT_DEL AFTER DELETE ON RISK.GENERIC FOR EACH ROW MODE DB2SQL BEGIN ATOMIC INSERT INTO RISK.AUDIT_TRAIL (TABLE_NAME, ACTION, GRT, GRTNAME, GRTDESC) VALUES ('GENERIC','D', OLD.GRT, OLD.GRTNAME, OLD.GRTDESC); END;

29. Referential Integrity EMP EMPNO FIRSTNAME MIDINIT LASTNAME WORKDEPT PHONENO HIREDATE JOB SEX BIRTHDATE SALARY BONUS DEPT DEPTNO DEPTNAME MGRNO ADMRDEPT LOCATION

31. Indexes INDEXSPACE TABLESPACE TABLE DEPT INDEX on DEPTNO A00 B01 C01 D01

36. Sample Database

37. Sample Database 1 2 3 4 5 6 7 8 9 10 11 DEPT EMP PROJ EMPPROJACT EMP_ PHOTO_ RESUME ACT PROJACT

38. Sample Database ACTNO ACTKWD ACTDESC ACT DEPT DEPTNO DEPTNAME MGRNO ADMRDEPT LOCATION EMP EMPNO FIRSTNME MIDINIT LASTNAME WORKDEPT PHONENO HIREDATE JOB EDLEVEL SEX BIRTHDATE SALARY BONUS COMM EMP_ PHOTO_ RESUME EMPNO EMP_ROWID PSEG_PHOTO BMP_PHOTO RESUME EMPPROJACT EMPNO PROJNO ACTNO EMPTIME EMSTDATE EMENDATE PROJACT PROJNO ACTNO ACSTAFF ACSTDATE ACENDATE PROJ PROJNO PROJNAME DEPTNO RESPEMP PRSTAFF PRSTDATE PRENDATE MAJPROJ

45. Advanced SQL

51. Inner Join SELECT EMPNO,LASTNAME, WORKDEPT FROM EMP WHERE WORKDEPT LIKE ‘D%'; SELECT DEPTNO,DEPTNAME FROM DEPT WHERE DEPTNO LIKE 'D%'

52. Inner Join SELECT EMPNO, LASTNAME, WORKDEPT DEPTNAME FROM EMP JOIN DEPT ON WORKDEPT = DEPTNO WHERE DEPTNO LIKE 'D%' ;

53. Outer Join SELECT EMPNO, LASTNAME, WORKDEPT DEPTNAME FROM EMP RIGHT OUTER JOIN DEPT ON WORKDEPT = DEPTNO WHERE DEPTNO LIKE 'D%' ;

65. Embedded SQL

67. Static Program Preparation DB2 Catalog DB2 Directory Source Program DCLGEN Precompiler Modified Source DBRM Bind Compile Link edit Package Plan Load Module

68. Collections in HUON Source Program DBRM Load Module Bind Package in FIGE1 collection FIGE1 tables Package in FIGE2 collection FIGE2 tables Package in FIGE3 collection FIGE3 tables Bind Bind

71. Programming with cursors DECLARE C1 CURSOR FOR SELECT DEPTNO, DEPTNAME FROM DEPT WHERE ADMRDEPT = :ADMRDEPT

72. Programming with cursors OPEN C1 Results Set

73. Programming with cursors First fetch... FETCH C1 INTO :DEPTNO, :DEPTNAME Results Set

74. Programming with cursors Next one… FETCH C1 INTO :DEPTNO, :DEPTNAME Results Set

75. Programming with cursors And again… FETCH C1 INTO :DEPTNO, :DEPTNAME Results Set

76. Programming with cursors And again… FETCH C1 INTO :DEPTNO, :DEPTNAME Results Set

77. Programming with cursors …and so on until the last line of the results set… …the next FETCH returns an SQLCODE of +100, with no rows returned. Host variables may or may not contain valid data at this point, so ALWAYS check your SQLCODE before processing your data! Results Set . . .

78. Programming with cursors Always clean up your cursors! Data processing is finalised, the cursor is closed and all your results set storage is cleared up once you issue the CLOSE C1 statement, after your FETCH processing gets the +100 SQLCODE signifying the end of the results set.

82. Performance: The Black Arts

86. Unit of Work time Program begins Update Insert Delete COMMIT Log

87. Unit of Work time Error! Program begins Update Insert Delete ROLLBACK

89. Concurrency Page Lock Matrix

95. EXPLAIN EXPLAIN ALL SET QUERY=1 FOR SELECT FIRSTNME, MIDINIT, LASTNAME FROM EMP WHERE EMPNO=‘000240’; Access Paths UDF Resolution Cost Estimates Explain Plan, Package or SQL statement DB2 Optimizer PLAN_TABLE DSN_STATEMENT_TABLE DSN_FUNCTION_TABLE

96. Tools of the trade