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Unit 5. Joins, Features and Techniques

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Unit Objectives

Understand heterogeneous joins

Use the Joiner transformation in a mapping

Practice using Designer features and techniques

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Heterogeneous Joins

Heterogeneousjoins cannot be performed on a single database, e.g. Oracle table and DB table !lat file and database table

"#o flat files

Use a Joinertransformation $performs the join #ithin the mapping%

One source is designated the &aster, the other Detail

"he Joiner select ro#s from the t#o sources based on a join condition,e.g. matching customer 'D

&aster (ource

Detail (ource

Joiner Join )esults

Join *ondition+&aster.*ustomer'D Detail.*ustomer'D

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Joiner Transor!ation

-ctie

Ports 'nput or input/output

One source is designated&aster, the other Detail.

*hec0 & column for

ports from &aster source

Usage e1amples+ Join t#o flat files

Join t#o tables from

different databases Join a flat file #ith a

relational table

"eror!s heterogeneous joins on t#o data $o#s

2nter join condition

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%&eci' Join T'&e

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Join T'&es

3ormal $inner% join 4 0eeps onl5matching ro#s based on the condition

&aster outer join 6 0eeps all ro#s from

Detail and matching ro#s from &aster

Detail outer join 6 0eeps all ro#s from&aster and matching ro#s from Detail

!ull outer join 6 0eeps all ro#s from both&aster and Detail

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%hortcuts

- shortcut is a d5namic lin0 to the original object

'f the object is edited, all shortcuts inherit the changes

Original object must be in a shortcut folder

'n same repositor5 4 called a local shortcut

'n a global repositor5 4 called a global shortcut $not used in this course%

*reate a shortcut b5 dragging the object into another open folder orinto a mapping

(hortcuts appear in the 3aigator #indo# #ith a small cured arro#

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Unit 5 +ab +oad %a$es Transaction %taging Tab$e

-reate a !a&&ing using a Joiner transor!ation heterogeneous join/

-reate0run a #or$o# or this !a&&ing

%a$estransactions

$at i$e/%TT%-T6O%

tab$e/

(ource (taging

-rea

%T"O7U-T tab$e/

Join

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+ab evie#

7hat did #e accomplish #ith this lab8

9uestions8

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Unit 5 +ab :Features and Techniques 6

(hortcut to Port 2diting from3ormal :ie#

*reate "ransformation &ethods

(cale6"o6!it Designer Options

Object (hortcuts and *opies

*op5 Objects 7ithin andBet#een &appings

Practice using Designer features and techniques+

-uto -rrange

)emoe ;in0s

)eert to (aed

;in0 Path

Propagating Ports

-utolin0 b5 3ame and Position

&oing Ports

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+ab : evie#

7hat did #e accomplish #ith this lab8

9uestions8

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Unit 5 ;ui