2. SAP System : 3 Tier Client/Server DB Server SAP Application Server SAP GUI Presentation Server SAP GUI SAP GUI

3. SAP SYSTEM (3 Tier Architecture) Presentation Layer (Windows based) Application Layer (Windows Server/UNIX) Database Server Database Layer (Windows Server/UNIX) M SAP Instance Oracle Informix DB2 MS SQL Server SAP DB/MaxDB G Dispatcher Request Queue D D B V S E SAP Buffer (Shared Mem) SAP GUI SAP GUI

4. SAP System : Dialog Processing Database Server Application Server Dispatcher Request Queue D D D D … SAP Buffer Program Table … 1 3 4 5 6 8 9 10 Report zpsm1. Tables customers. Select single * from customers where id = 1. Write: / customers-name. Execute ABAP statement Check Program in Program Buffer 7 Load&Gen Program SQL Request Send List Generate Screen(List) Send Request Request List 2 Search for free WP Store request to queue Send request to WP SAP GUI

5. Dialog Work Process Architecture TaskHandler DYNPRO Processor ABAP Processor Local Memory Memory Space DB Interface List buffer Database Server Dialog Work Process Result Set Memory

7. DB Interface SAP Application Server Local Memory Dialog WP TaskHandler DB Interface Result Set Database Server ~ 32 KB in length ABAP Processor DYNPRO Memory Space List Buffer

9. Example Tables in DB sflight 75 20010226 0110 SQ 130 20010228 0400 LH 145 20010110 0400 LH 150 20010101 0400 LH price fldate connid carrid

14. SELECT Statement Working Steps 1. Transform open SQL to DB SQL and return result set into result set work area SELECT * FROM spfli. … ENDSELECT. SELECT * FROM spfli; 2. Loop with data in result set and transfer each record to work area in memory space SELECT * FROM spfli. … ENDSELECT. Table Structure in Memory Space

17. Exercise I customers-id customers-name customers-city

18. SELECT with WHERE Clause

22. Select Single Record

24. Select Column List

25. Select * : Example SELECT *

28. Select Column : Example I

30. Select Column : Example II

32. Select Statement : Special Topics

39. Exercise I customers-id customers-name customers-city ห้ามใช้ SELECT *

40. Exercise II usr02-ltime usr02-trdat usr02-bname ห้ามใช้ SELECT *

41. ABAP : Inner Join

49. Open SQL – Inner Join Table : A Table : B Single Result Table(Result set) Select … inner join.. Endselect. Database Server Application Server 1 2 b2 a2 b1 a1 b a c2 b2 c3 b3 c1 b1 c b b2 b1 B~b c2 a2 c1 a1 B~c A~a

51. Inner Join/Outer Join Example ZPRODUCTS ZSALES ZSALEREPS ZCUSTOMERS 432555 Singapore David 3 234111 Bangkok Micheal 4 222222 London Peter 2 111111 New York John 1 tel city name id CD Tape Ruler Pencil Pen prod_name 120 X1 80 B1 99 Y1 125 A2 100 A1 on_hand p_id 90 50 10 qty 02 20020321 X1 3 01 20020318 A2 1 01 20020318 A1 1 sale_id sale_date prod_id cust_id Pipop 02 Somchai 01 name sale_id

56. Exercise : User Master USR02-BNAME USR02-TRDAT ADCP-TEL_NUMBER USR02 USR21 ADCP BNAME PERSNUMBER ADDRNUMBER Tables Relationship

57. ABAP : Outer Join

61. Internal Table

69. Standard Key of Internal Table Data: begin of tab occurs 0, f1 type C , f2 type I, f3 type N , f4 type P, end of tab. tab f4 f3 f2 f1

71. Access Database Without Internal Table

72. Access Database Using Internal Table

74. Exercise I : Change Using Internal Table

84. Exercise I

90. ABAP Practice

97. Exercise II

98. Exercise II usr02-ltime usr02-trdat usr02-bname 1. ห้ามใช้ SELECT * 2. ใช้ Internal Table

99. Exercise III

100. Tables Relationship for User Master USR02-BNAME USR02-TRDAT ADCP-TEL_NUMBER USR02 USR21 ADCP BNAME PERSNUMBER ADDRNUMBER Tables Relationship

101. Exercise III : User Master usr02-bname usr02-trdat adcp-tel_number ใช้ Internal Table