DB2Migration 절차, 방법및MTK 소개 -타DBMS와연계 -SQL ... migration 절차및방법 DB2...
Transcript of DB2Migration 절차, 방법및MTK 소개 -타DBMS와연계 -SQL ... migration 절차및방법 DB2...
-
DB2 Information Management Software
2008 IBM Corporation
DB2 Migration , MTK
- DBMS
- SQL
IBM KoreaSoftware GroupIM
-
2 2008 IBM Corporation
IBM DB2
1. DB2 Migration
2. DB2 Migration
3. MTK
4. SQL Conversion
5. MTK Migration
6. Access Guidelines
7. User Defined Function
8. DBMS
9. SQL
-
3 2008 IBM Corporation
IBM DB2
1. DB2 Migration 1. DB2 Migration
TCO : 5 (TCO:Total cost of Ownership) DBMS
49%-70% .
Migration offering , Migration tool kit,
POC .
IBM Know-how
DB2 .
Application DB
.
DB2 IBM , TPC-C, TPC-H
SAP , DB2 Autonomic computing
Grid .
-
4 2008 IBM Corporation
IBM DB2
2. DB2 migration 2. DB2 migration
DB2 Migration
Assessment & PlanningAssessment & Planning
Database object migrationDatabase object migration
Application conversionApplication conversion
Data MigrationData Migration
Performance tuningPerformance tuning
Test Test
MigrationMigration databasedatabase migration migration , ,
migrationmigration tooltool
Database structure Database structure DatabaseDatabase objectobject migration migration
ApplicationApplication conversion conversion
Data Data
performance tuning performance tuning
Migration Migration database, application database, application
HA HA , , replication, backup toolreplication, backup tool
-
5 2008 IBM Corporation
IBM DB2
2. DB2 migration 2. DB2 migration
DB2 Migration 1. Assessment & Planning
- migration
Assessment item Assessment item
DB2 porting guideDB2 porting guideIBM IBM
MigrationMigration tooltool Migration Migration tooltool
Application architectureApplication architecture
Application sizeApplication size
Application SQL Application SQL
ApplicationApplication
Database sizeDatabase size
Table Table , , row size, indexrow size, index
Stored procedure, User defined functionStored procedure, User defined function
TriggerTrigger
Database structureDatabase structure
((Middleware, Tool, Compiler, etc.)Middleware, Tool, Compiler, etc.)
PlatformsPlatforms
MigrationMigration
-
6 2008 IBM Corporation
IBM DB2
2. DB2 migration 2. DB2 migration
DB2 Migration 2.
-
DB2 DB2
DB2 DB2
DB2 DB2 Tool Tool
IBM IBM
ToolTool
, ,
Client Client
Application Application
Application Application
DB2 DB2
DB2 DB2
DB2 DB2
DB2 DB2
OS OS
Disk Disk
-
7 2008 IBM Corporation
IBM DB2
2. DB2 migration 2. DB2 migration
DB2 Migration 3. Database object migration
- database object migration
DB2 Migration tool kitDB2 Migration tool kit
DB2 UDB conversion guide (from Oracle/Sybase/SQL server )DB2 UDB conversion guide (from Oracle/Sybase/SQL server )
IBM IBM
ToolTool
Stored procedureStored procedure user defined functionuser defined function Stored procedure,Stored procedure,
User defined functionUser defined function
Column typeColumn type
IndexIndex
ConstraintsConstraints
Table Table
Database typeDatabase type
PartitioningPartitioning
TablespaceTablespace
LogsLogs
Database logical / Database logical /
physical layout physical layout
DatabaseDatabase
Object Object
MigrationMigration
-
8 2008 IBM Corporation
IBM DB2
2. DB2 migration 2. DB2 migration
DB2 Migration 4. Application Migration
- DB2 application source conversion
DB2 Migration tool kitDB2 Migration tool kit
DB2 Development centerDB2 Development center
DB2 UDB conversion guide (from Oracle/Sybase/SQL server )DB2 UDB conversion guide (from Oracle/Sybase/SQL server )
IBM IBM
ToolTool
IBMIBM MTKMTK on the flyon the fly SQL translatorSQL translator SQL conversion SQL conversion
SQL SQL
conversion toolconversion tool
SQLSQL SQL SQL
SQLSQL
Isolation level, lockIsolation level, lock
Error Error
Application source Application source
Source Source
ConversionConversion
-
9 2008 IBM Corporation
IBM DB2
2. DB2 migration 2. DB2 migration
DB2 Migration 5. Data Migration
- DB2 .
DB2DB2 loadload datadata
TypeType conversionconversion
programprogram script script
Data Data
DB2 Migration tool kitDB2 Migration tool kit
DB2 Admin clientDB2 Admin client
DB2 Load toolDB2 Load tool
IBM IBM ToolTool
DB2 Load toolDB2 Load tool data loaddata load
Referential constraintReferential constraint Data Data
Type Type migration migration
--NumericNumeric
--Date, Date, datetimedatetime
Source dataSource data target datatarget data sample sample
Table Data Table Data
Data migration Data migration
-
10 2008 IBM Corporation
IBM DB2
2. DB2 migration 2. DB2 migration
DB2 Migration 6. Performance tuning
- database application
DB2 Performance Tuning GuideDB2 Performance Tuning Guide
DB2 Health centerDB2 Health center
DB2 AdvisorDB2 Advisor
IBM IBM
ToolTool
DB2 databaseDB2 database
DB2 applicationDB2 application
monitoringmonitoring
DB2DB2 advisoradvisor health centerhealth center
Migration Migration
Performance Performance
tuningtuning
-
11 2008 IBM Corporation
IBM DB2
2. DB2 migration 2. DB2 migration
DB2 Migration 7. Test
- application
DB2 Migration tool kitDB2 Migration tool kitIBM IBM ToolTool
Migration Migration
Data Data
Application Application
Migration Migration test test
Test Test
-
12 2008 IBM Corporation
IBM DB2
2. DB2 migration 2. DB2 migration
DB2 Migration 8.
- Migration DB2
backup toolbackup tool Backup Backup
DB2 Migration tool kitDB2 Migration tool kit
DB2 admin guideDB2 admin guide
DB2 HA DB2 HA
IBM IBM ToolTool
Table, indexTable, index REORGREORG
Database Database
HA HA
-
13 2008 IBM Corporation
IBM DB2
3. DB2 MTK 3. DB2 MTK
DB2 MTK (DB2 Migration Tool Kit)?- DB(Oracle, Sybase) DB2 migration tool- migration , .
- DB2 .
- Source DB DDL
ODBC/JDBC , migration source DB DDL .- DB Object
Table, index, trigger, sequence, procedure- Data
script , data tool .- Migration report
Migration HTML report .- SQL translator
DB2 SQL , sql tool.
- Function conversion library
DB DB2 library .
-
14 2008 IBM Corporation
IBM DB2
3. DB2 MTK 3. DB2 MTK
1. Project ( )
2. Source
- MTK source DB Metadata(DDL) import
3. Convert
- Source DB DDL
4. Refine
-
5. Data script
- Data script
6. DB2 deploy
- DB2 DB migration
-
15 2008 IBM Corporation
IBM DB2
3. DB2 MTK 0) DB2 MTK 3. DB2 MTK 0) DB2 MTK
- PC : Xwindows GUI
tool, Xterminal S/W .
- Server : JRE 1.3
-DISPLAY=:0.0
-CLASSPATH=$CLASSPATH:${ORACLE_HOME}/j
dbc/lib/classes12.zip
Oracle source DB .
MTK MTKMain >./MTKMain
-
16 2008 IBM Corporation
IBM DB2
3. DB2 MTK 1) Project 3. DB2 MTK 1) Project
Migration project
-Project Name
Project -Project Path
( Project
)
-Source DB
Oracle, Sybase,MS SQL Server -DB2 target
Target DB2
-
17 2008 IBM Corporation
IBM DB2
3. DB2 MTK 2) source 3. DB2 MTK 2) source
source DDL SQL file , Import sql file import.
DB metadata ,Extract .
Extract , popup , DB ., Database, Service name, , OK .
-
18 2008 IBM Corporation
IBM DB2
3. DB2 MTK 2) source 3. DB2 MTK 2) source
Source DB , source DB objecttree ., Migration check
DDL file . . .
Extract .
-
19 2008 IBM Corporation
IBM DB2
3. DB2 MTK 2) source 3. DB2 MTK 2) source
, .src file .View, delete .
Source , tab Convert .
-
20 2008 IBM Corporation
IBM DB2
3. DB2 MTK 3) Convert3. DB2 MTK 3) Convert
, Convert .
Schema conversion data type mapping .Type .
-
21 2008 IBM Corporation
IBM DB2
3. DB2 MTK 3) Convert3. DB2 MTK 3) Convert
type target type , , .
-
22 2008 IBM Corporation
IBM DB2
3. DB2 MTK 4) Refine3. DB2 MTK 4) Refine
Convert refine .
-
23 2008 IBM Corporation
IBM DB2
3. DB2 MTK 5) Generate Data Transfer scripts3. DB2 MTK 5) Generate Data Transfer scripts
Data .
script file
IMPORT / LOAD ( LOAD)
Data (INSERT/ REPLACE)
File format
Create Script script file .
-
24 2008 IBM Corporation
IBM DB2
3. DB2 MTK SQL Translator 3. DB2 MTK SQL Translator
Conversion sql ., , table .
SQL .
Tools SQL Translator
-
25 2008 IBM Corporation
IBM DB2
3. DB2 MTK Reporting 3. DB2 MTK Reporting
HTML reporting.
/projects//Reports/ .
- Conversion_asset.html : project report
- object
Database, Schema,Package,User type,Table,View,Column,Index,Foreign Key,Proc & Function,Trigger
- report
, report - Tablespace table rowsize report
- data .
table , target table . Table key table toggle, click .
-
26 2008 IBM Corporation
IBM DB2
4. SQL conversion SQL Syntax : Sequence4. SQL conversion SQL Syntax : Sequence
.
NEXTVAL(CURRVAL) for Sequence_nameSequence_name.NEXTVAL(CURRVAL)
DB2Oracle
-
27 2008 IBM Corporation
IBM DB2
4. SQL conversion SQL Syntax : rownum4. SQL conversion SQL Syntax : rownum
Rownum select, insert, update ,
- row_number() over() .
Rownum row ,
- row_number() over() , fetch first n rows only
Update ( select c1 from tab1 where c2=v2 fetch first 10 rows only)set c1=v1;
Update tab1 set c1=v1
where c2=v2 and rownum
-
28 2008 IBM Corporation
IBM DB2
4. SQL conversion SQL Syntax : outer join4. SQL conversion SQL Syntax : outer join
Oracle (+) outer join
Oracle outer join table (+)
, DB2 .
Select a.last_name , a.id, b.name
From emp a left outer join customer b
on a.id=b.sales_rep_id
Where b.name like K%;
Select a.last_name , a.id, b.name
From emp a , customer b
Where a.id = b.sales_rep_id (+)
and b.name(+) like K% ;
Select a.last_name , a.id, b.name
From emp a full outer join customer b
on a.id=b.sales_rep_id ;
Select a.last_name , a.id, b.name
From emp a , customer b
Where a.id(+) = b.sales_rep_id(+) ;
Select a.last_name , a.id, b.name
From emp a left outer join customer b
on a.id=b.sales_rep_id ;
Select a.last_name , a.id, b.name
From emp a , customer b
Where a.id = b.sales_rep_id(+) ;
Select a.last_name , a.id, b.name
From emp a right outer join customer b
on a.id=b.sales_rep_id ;
Select a.last_name , a.id, b.name
From emp a , customer b
Where a.id(+) = b.sales_rep_id ;
DB2Oracle
-
29 2008 IBM Corporation
IBM DB2
4. SQL conversion SQL Syntax : dual table4. SQL conversion SQL Syntax : dual table
Oracle system information dual table ,
- DB2
SYSIBM.SYSDUMMY1 select VALUES
VALUES(current timestamp) into ;
Or
Select current timestamp
From sysibm.sysdummy1;
Select SYSDATE from DUAL;
DB2Oracle
-
30 2008 IBM Corporation
IBM DB2
4. SQL conversion SQL Syntax : decode4. SQL conversion SQL Syntax : decode
Oracle decode DB2 CASE
Select avg (
case grade when A then 1 when B then 2 when C then 3 when D then 4 END)
From students;
Select avg ( decode ( grade, A,1,B,2,C,3,D,4))From students;
DB2Oracle
-
31 2008 IBM Corporation
IBM DB2
4. SQL conversion SQL Syntax : nvl4. SQL conversion SQL Syntax : nvl
Oracle nvl DB2 COALESCE
Select coalesce(manager_id , No Manager)From employee;
Select Nvl(manager_id , No Manager)From employee;
DB2Oracle
-
32 2008 IBM Corporation
IBM DB2
4. SQL conversion SQL Syntax : 4. SQL conversion SQL Syntax :
to_char UDF ora8.to_char
to_number int, decimal casting ora8.to_number
lpad, rpad UDF ora8.lpad(rpad)
trim ltrim / rtrim .
nvl COALESCE
- MTK ora8.*** , .
- UDF (user defined function) Logic ,
.
)
CREATE FUNCTION RPAD (C1 VarChar(4000), N integer, C2 VarChar(4000))RETURNS VARCHAR(4000) LANGUAGE SQLSPECIFIC RPADBaseDETERMINISTICCONTAINS SQLNO EXTERNAL ACTIONRETURN substr(C1 || repeat(C2,((sign(N-length(C1))+1)/2)*(N-length(C1)+length(C2))/(length(C2)+1-sign(length(C2)))),1,N) ;
-
33 2008 IBM Corporation
IBM DB2
5. MTK Migration 5. MTK Migration
DB
IBM MTK DB migration .
Migration Migration DB tuning, .
Migration
SQL Oracle , .
SQL MTK SQL Translator .
IBM tool DB2 .
-
34 2008 IBM Corporation
IBM DB2
5. MTK References5. MTK References
MTK Web Site
-http://www.ibm.com/db2/migration/mkt
Migration Station
-http://www.ibm.com/developerworks/ondemand/migrate/db.html
MTK Support, Mailbox : [email protected]
-
35 2008 IBM Corporation
IBM DB2
MTK DemoMTK Demo
DEMO
-
36 2008 IBM Corporation
IBM DB2
6. Access Guidelines: TBSCAN6. Access Guidelines: TBSCAN
Query: SELECT C1 FROM T1 /* */
Plan:
RETURN
|
TBSCAN
|
TABLE: DDEACONU
T1
-
37 2008 IBM Corporation
IBM DB2
6. Access Guidelines: IXSCAN6. Access Guidelines: IXSCAN
Query: SELECT C1 FROM T1 /* */
Plan:
RETURN
|
IXSCAN
( 2)
|
INDEX: DDEACONU
T1_I1
-
38 2008 IBM Corporation
IBM DB2
Query: SELECT C1 FROM T1 /* */
Plan:
RETURN
|
FETCH
/------------------+-----------------\
RIDSCN TABLE: DDEACONU T1
|
SORT
|
IXSCAN
|
INDEX: DDEACONU T1_I1
6. Access Guidelines: LPREFETCH6. Access Guidelines: LPREFETCH
-
39 2008 IBM Corporation
IBM DB2
Query: SELECT C1 FROM T1 /*
-
40 2008 IBM Corporation
IBM DB2
Query: SELECT T1 FROM T1 WHERE C1 = ? AND C2 = ?
Guideline:
/*
*/
Note: Indexes must be specified in a IXAND guideline.
6. Access Guidelines: IXAND6. Access Guidelines: IXAND
-
41 2008 IBM Corporation
IBM DB2
Query: SELECT * FROM T1 WHERE C1 in (?,?)
Guideline: /* */
Note: We cannot specify indexes in an IXOR guideline
6. Access Guidelines: IXOR6. Access Guidelines: IXOR
-
42 2008 IBM Corporation
IBM DB2
Query: select * from t1 join t2 on t1.c1 = t2.c1
Guideline: /* */
Guideline: /* */
Guideline: /* */
Guideline: /* */
6. Access Guidelines: JOIN6. Access Guidelines: JOIN
-
43 2008 IBM Corporation
IBM DB2
Query: select * from t1, t2, t3 where t1.c1 = t3.c1 and t1.c1 = t2.c1
Guideline: /*
*/
Note: Make sure the tables joined are part of the same QTB
6. Access Guidelines: More complex Join 6. Access Guidelines: More complex Join
-
44 2008 IBM Corporation
IBM DB2
6. More ways to reference tables: TABID attribute6. More ways to reference tables: TABID attribute
Query: SELECT * FROM T1
Rewriten query: SELECT Q1.C1 AS "C1", Q1.C2 AS "C2FROM DDEACONU.T1 AS Q1
Use of TABID attribute in an ACCESS hint:
SELECT * FROM T1 /* */
OR
SELECT * FROM T1 /* */
-
45 2008 IBM Corporation
IBM DB2
6. Specifying exposed names in ACCESS hints:6. Specifying exposed names in ACCESS hints:
Query: SELECT * FROM T1 as TAB
Use of exposed name in an ACCESS hint:
SELECT * FROM T1 /* */
Note:
SELECT * FROM T1 /* */Will return SQL0437 rc13, EXP0009W: TABLE attribute not found
-
46 2008 IBM Corporation
IBM DB2
6. Accessing base tables through views:6. Accessing base tables through views:
Tables, indexes and views:
CREATE TABLE T1 (C1 INT, C2 INT);
CREATE INDEX T1_I1 ON T1 (C1);
CREATE VIEW V1 AS SELECT * FROM T1 as TAB;
CREATE VIEW V2 AS SELECT C1 FROM V1;
Query:
SELECT C1 FROM v2 /*
*/;
-
47 2008 IBM Corporation
IBM DB2
7. User Defined Function C sample7. User Defined Function C samplevoid SQL_API_FN ToNum ( SQLUDF_DOUBLE *inAmt
, SQLUDF_CHAR *outVal, SQLUDF_SMALLINT *amtNullInd, SQLUDF_SMALLINT *valNullInd, SQLUDF_TRAIL_ARGS_ALL, SQLUDF_DBINFO *dbinfo)
{int intvalue, charlen;int i, j,k;char charvalue[30], *charp, *retp, *retvalue;char format[30];
sprintf(charvalue, "%f", *inAmt);for ( k = 0 ; k < strlen(charvalue) ; k++ ) if ( charvalue[k] == '.' ) break;charlen = k;
retp = retvalue = (char *)malloc(charlen + charlen/3 + 5);
charp = charvalue;
if (charvalue[0] == '-') {*retp++ = *charp++;charlen -= 1;
}
while (charlen > 3) {i = charlen % 3;if (i == 0)
i = 3;for (j=0; j
-
48 2008 IBM Corporation
IBM DB2
7. User Defined Function C sample7. User Defined Function C samplevoid SQL_API_FN ToHg ( SQLUDF_DOUBLE *inAmt
, SQLUDF_CHAR *outVal, SQLUDF_SMALLINT *amtNullInd, SQLUDF_SMALLINT *valNullInd, SQLUDF_TRAIL_ARGS_ALL, SQLUDF_DBINFO *dbinfo)
{
/*static char *suja[]={"","","","","","","","","",""};static char *suja[]={"","","","","","","","","",""};*/static char *suja[]={"","","","","","","","","",""};
char charvalue[100], *charp;char retv[100], *retp, *returnvalue;char tmp_su[1];int charlen,cur_num;int i,j,k;
memset(retv,0x00,sizeof(retv));retp = returnvalue = retv;
sprintf( charvalue,"%f", *inAmt);charp = charvalue;
for ( i = 0; i < strlen(charvalue); i++ ) if ( charvalue[i] == '.' ) break;charlen = i;
if ( charvalue[0] == '-' ) {sprintf(retp,"%c",*charp++);retp += strlen(retp);charlen--;
}
-
49 2008 IBM Corporation
IBM DB2
7. User Defined Function C sample7. User Defined Function C sample
while ( charlen > 0 ) {i = charlen % 4 ;if ( i == 0 ) i = 4;k = i;for ( j = 0; j < i ; j++ ) {
sprintf(tmp_su,"%c",*charp++);cur_num = atoi(tmp_su);
if ((cur_num>=1)&&(cur_num
-
50 2008 IBM Corporation
IBM DB2
7. User Defined Function C sample7. User Defined Function C sample
# Build proceduredb2 connect to sample
db2 prep kc.sqc bindfiledb2 bind kc.bnd
cl -Zi -Od -c -W2 -DWIN32 -MD kc.c
link -debug -out:kc.dll -dll kc.obj db2api.lib -def:kc.defcopy kc.dll "C:\Program Files\IBM\SQLLIB\FUNCTION"
CREATE FUNCTION TOHG(DOUBLE)RETURNS VARCHAR(45)EXTERNAL NAME 'kc!ToHg'FENCEDLANGUAGE CPARAMETER STYLE SQL DETERMINISTICNO SQLNO EXTERNAL ACTIONALLOW PARALLEL DBINFO;
CREATE FUNCTION ToHg(INTEGER)RETURNS VARCHAR(45)SOURCE TOHG(DOUBLE);
CREATE FUNCTION ToHg(SMALLINT)RETURNS VARCHAR(45)SOURCE TOHG(DOUBLE);
CREATE FUNCTION TONUM(DOUBLE)RETURNS VARCHAR(45)EXTERNAL NAME 'kc!ToNum'FENCEDLANGUAGE CPARAMETER STYLE SQL DETERMINISTICNO SQLNO EXTERNAL ACTIONALLOW PARALLEL DBINFO;
CREATE FUNCTION TONUM(INTEGER)RETURNS VARCHAR(45)SOURCE TONUM(DOUBLE);
CREATE FUNCTION TONUM(SMALLINT)RETURNS VARCHAR(45)SOURCE TONUM(DOUBLE);
-
51 2008 IBM Corporation
IBM DB2
8. DBMS 8. DBMS
WFS DEMO
-------------------------------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------------------------------connect to sample;drop wrapper net8;
create wrapper net8;
CREATE SERVER ORCL_SVR TYPE ORACLE VERSION 10WRAPPER NET8--AUTHORIZATION SCOTT PASSWORD TIGEROPTIONS(NODE 'orcl'
, ADD CPU_RATIO '1.0', COLLATING_SEQUENCE 'N', IO_RATIO '1.0', COMM_RATE '1.0', DB2_TWO_PHASE_COMMIT 'Y', VARCHAR_NO_TRAILING_BLANKS 'N', PUSHDOWN 'Y', DB2_MAXIMAL_PUSHDOWN 'Y');
create user mapping for user server orcl_svroptions ( remote_authid 'scott', remote_password 'tiger');
commit;
-
52 2008 IBM Corporation
IBM DB2
8. DBMS 8. DBMS
-------------------------------------------------------------------------------------------------------------------------------- Table : Nickname ------------------------------------------------------------------------------------------------------------------------------
create nickname ora_dept for orcl_svr.scott.dept;create nickname ora_emp for orcl_svr.scott.emp;
commit;
-------------------------------------------------------------------------------------------------------------------------------- Table : Data ------------------------------------------------------------------------------------------------------------------------------
drop table db2_dept ;drop table db2_emp ;create table db2_dept like ora_dept;create table db2_emp like ora_emp ;
insert into db2_dept select * from ora_dept;insert into db2_emp select * from ora_emp ;
export to ora_dept.del of del select * from ora_dept;export to ora_emp.del of del select * from ora_emp;
commit;
-
53 2008 IBM Corporation
IBM DB2
8. DBMS 8. DBMS
-------------------------------------------------------------------------------------------------------------------------------- Table : Nickname ------------------------------------------------------------------------------------------------------------------------------
create nickname ora_dept for orcl_svr.scott.dept;create nickname ora_emp for orcl_svr.scott.emp;
commit;
-------------------------------------------------------------------------------------------------------------------------------- Table : Data ------------------------------------------------------------------------------------------------------------------------------
drop table db2_dept ;drop table db2_emp ;create table db2_dept like ora_dept;create table db2_emp like ora_emp ;
insert into db2_dept select * from ora_dept;insert into db2_emp select * from ora_emp ;
export to ora_dept.del of del select * from ora_dept;export to ora_emp.del of del select * from ora_emp;
commit;
-
54 2008 IBM Corporation
IBM DB2
8. DBMS 8. DBMS
-------------------------------------------------------------------------------------------------------------------------------- Table : Query ------------------------------------------------------------------------------------------------------------------------------
select empno, ename, job, a.deptno, b.dnamefrom ora_emp a, ora_dept b
where a.deptno = b.deptno;
select empno, ename, job, a.deptno, b.dnamefrom db2_emp a, db2_dept b
where a.deptno = b.deptno;
select empno, ename, job, a.deptno, b.dnamefrom ora_emp a, db2_dept b
where a.deptno = b.deptno;
select empno, ename, job, a.deptno, b.dnamefrom db2_emp a, ora_dept b
where a.deptno = b.deptno;
commit;
-
55 2008 IBM Corporation
IBM DB2
8. DBMS 8. DBMS
--------------------------------------------------------------
--------------------------------------------------------------
--
-- set passthru :
--
--------------------------------------------------------------
--------------------------------------------------------------
set passthru orcl_svr;
drop table employee;
drop table department;
select * from tab;
select * from all_users;
set passthru reset;
select * from tab;
select * from all_users;
commit;
-
56 2008 IBM Corporation
IBM DB2
9. SQL 9. SQL
Data Type
- DECFLOAT(16) / DECFLOAT(32)
Function
- ROWID
- ROW CHANGE TOKEN / ROW CHANGE TIMESTAMP
- TO_CHAR / TO_DATE
- START WITH name = 'Goyal'
- CONNECT BY PRIOR empid = mgrid
- ORDER SIBLINGS BY salary;
- FETCH FIRST n ROWS / ROW_NUMBER() / ROWNUM
- NVL / DECODE
- LEAST / GREATEST
- BITAND, BITANDNOT, BITOR, BITXOR, BITNOT
-
57 2008 IBM Corporation
IBM DB2
9. SQL 9. SQL
DUAL
- select current date from dual
Outer Join (+)
- select * from org a, org2 b where a.deptnumb = b.deptnumb
- select * from org a, org2 b where a.deptnumb(+) = b.deptnumb
- select * from org a, org2 b where a.deptnumb = b.deptnumb(+)
SEQUENCE
- sequence-name.NEXTVAL can be specified in place of NEXT VALUE FOR sequence-name
- sequence-name.CURRVAL can be specified in place of PREVIOUS VALUE FOR sequence-
name
-
58 2008 IBM Corporation
IBM DB2
9. SQL 9. SQL
SELECT
LEVEL
, cast(SYS_CONNECT_BY_PATH(Name, '-') as char(30))AS Path
, EMPNO, MGR
FROM EMP3
START WITH EMPNO = 7839
CONNECT BY PRIOR EMPNO = MGR
Order siblings by name
;
SELECT LEVEL
,cast(SYS_CONNECT_BY_PATH(Name, '-') as char(30))AS Path
,empno, mgr, Name
FROM EMP3
START WITH Name = 'KING'
CONNECT BY PRIOR empno = mgr
ORDER SIBLINGS BY Name
;
-
59 2008 IBM Corporation
IBM DB2
Q&AQ&A
Q&AQ&A