Oracle Database 11 g - Online Public Access Catalog

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536 CHAPTER 12 ■ DATA WAREHOUSINGVIDEO_NAMERENTAL_TYPE_XML------------------ --------------------------------------------Walk the Line 100005500The Pacifier 100007500Superman Returns 1000020000....In this particular example, the output will display data only where a valid rental type transactionexists. Sometimes, the preferable situation may be to use a subquery in pivot_in_clauseto retrieve the data. In this case, instead of using the any keyword, you can replace pivot_in_clause with the query select distinct rental_type from rental_types, as shown here:SQL> select *from (select video_name, rental_type, quantity_rentedfrom video_mstr_vw)pivot xml (sum(quantity_rented)for rental_type in (select distinct rental_type from rental_types) )order by video_name desc/VIDEO_NAMERENTAL_TYPE_XML-------------------- --------------------------------------------Walk the Line 1000055001000<strong>11</strong>000210003
CHAPTER 12 ■ DATA WAREHOUSING 53720000The Pacifier 1000075001000<strong>11</strong>00021000320000....By using a subquery, the XMLType will show values for RENTAL_TYPE even if there are novalues in SUM(QUANTITY_RENTED). The subquery will typically result in a larger output than usingthe any clause in pivot_in_clause.Unpivot OperatorsThe unpivot operation rotates data from columns into rows. The unpivot operation does notreverse a pivot operation. The function of the unpivot operator is to take columns and convertthem into rows. The unpivot operation does not undo any aggregations/summarizations/calculations that were performed by the pivot operator. Think of unpivot as a mechanism tonormalize data structures. unpivot will essentially reduce the number of columns and createmore rows. Like the pivot operator, you can use the unpivot operation on multiple columns.Additional options include the ability to measure columns and aliasing.By taking the previous pivot example, you can see how the unpivot works. A table namedVIDEO_RENTAL_PIVOT_TABLE is created as a ctas from the previous multicolumn pivot example.In the following example, the data set is unpivoted on the month column:SQL> select * from video_rental_pivot_table2 unpivot ( (quantity_rented) FOR month IN (Jan, Feb))3* order by video_name, monthSQL> /
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The EXPERT’s VOIce ® IN ORACLEAl
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Contents at a GlanceAbout the Autho
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■CONTENTSixSQL*Plus New Features
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■CONTENTSxiEnterprise Manager Int
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■CONTENTSxiiiCombined Capture and
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■CONTENTSxvImprovements in Redo T
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About the Authors■SAM ALAPATI is
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xxii■ACKNOWLEDGMENTSNothing I do
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xxiv■INTRODUCTIONPerformance Mana
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xxvi■INTRODUCTION• The easy add
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xxviii■INTRODUCTION• The flashb
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2 CHAPTER 1 ■ INSTALLING, UPGRADI
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10 CHAPTER 1 ■ INSTALLING, UPGRAD
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58 CHAPTER 2 ■ DATABASE DIAGNOSAB
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100 CHAPTER 3 ■ DATABASE ADMINIST
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226 CHAPTER 5 ■ DATABASE SECURITY
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266 CHAPTER 6 ■ BACKUP AND RECOVE
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CHAPTER 7■ ■ ■Data PumpDBAs a
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CHAPTER 7 ■ DATA PUMP 315if test
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CHAPTER 7 ■ DATA PUMP 317DBA11g1
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CHAPTER 7 ■ DATA PUMP 319Encrypti
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CHAPTER 7 ■ DATA PUMP 321Please b
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CHAPTER 7 ■ DATA PUMP 323Remappin
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CHAPTER 7 ■ DATA PUMP 325SELECT d
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CHAPTER 7 ■ DATA PUMP 327Document
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CHAPTER 7 ■ DATA PUMP 329SQL> sel
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CHAPTER 7 ■ DATA PUMP 331SQL> sel
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CHAPTER 7 ■ DATA PUMP 333DBMS_OUT
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CHAPTER 7 ■ DATA PUMP 335If you a
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338 CHAPTER 8 ■ ORACLE STREAMSLat
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340 CHAPTER 8 ■ ORACLE STREAMSA s
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342 CHAPTER 8 ■ ORACLE STREAMSSQL
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344 CHAPTER 8 ■ ORACLE STREAMSThe
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346 CHAPTER 8 ■ ORACLE STREAMSStr
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348 CHAPTER 8 ■ ORACLE STREAMSDBM
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350 CHAPTER 8 ■ ORACLE STREAMSPle
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352 CHAPTER 8 ■ ORACLE STREAMSa p
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354 CHAPTER 8 ■ ORACLE STREAMSSpl
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356 CHAPTER 8 ■ ORACLE STREAMSpro
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358 CHAPTER 8 ■ ORACLE STREAMSSup
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CHAPTER 9■ ■ ■Storage Managem
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CHAPTER 9 ■ STORAGE MANAGEMENT 36
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416 CHAPTER 10 ■ DATA GUARD• Lo
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418 CHAPTER 10 ■ DATA GUARDsql ch
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420 CHAPTER 10 ■ DATA GUARDDBA11g
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422 CHAPTER 10 ■ DATA GUARDWhile
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424 CHAPTER 10 ■ DATA GUARDSQL> c
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428 CHAPTER 10 ■ DATA GUARD7. Swi
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430 CHAPTER 10 ■ DATA GUARDwho ha
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434 CHAPTER 10 ■ DATA GUARDDynami
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436 CHAPTER 10 ■ DATA GUARDSQL> B
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438 CHAPTER 10 ■ DATA GUARDcomman
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440 CHAPTER 10 ■ DATA GUARDCustom
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442 CHAPTER 10 ■ DATA GUARDselect
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444 CHAPTER 10 ■ DATA GUARDby Dat
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446 CHAPTER 11 ■ APPLICATION DEVE
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Page 596 and 597: 566 ■INDEXadvise failure command,
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586 ■INDEXOCISessionGet( ) method
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592 ■INDEXreader farm, 421read-on
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600 ■INDEXOracle Audit Vault, 259
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