Information Technology Reference
In-Depth Information
(1'(;(&
,)',%67$7
(;(&'/,'(/(7(
(1'(;(&
83'$7,1*5287,1(
',63/$<µ3+21(180%(572%(8'$7(' ¶
$&&(37:63$73+21(
',63/$<µ:$5'%(','(17 ¶
$&&(37:6%(','(17
3(5)2506'''02'85(3/$&(
,)'/,&2'( 12'$7$
',63/$<83'$7,1*(55251268&+52:)281'
,)'/,&2'( 68&&(66
',63/$<83'$7('3+21(180%(52)3$7,(17
:63$73+21(:,7+%(','(17:6%(','(17
6'''02'85(3/$&(
(;(&'/,*+886,1*3&%
6(*0(173$7,(17
,1726'''02'8$5($
6(*/(1*7+6'''02'8/(1
:+(5(%(','(17 :6%(','(17
),(/'/(1*7+('''012/(1
(1'(;(&
,)',%67$7 *(
029(72'/,&2'(
(/6(
029(:63$73+21(723$73+21(
(;(&'/,5(3/$&(
(1'(;(&
Step 2.4. Process the translated program to access a hierarchical database.
The translated IMS database program can then be used to update the DL/1 data-
base with the same information capacity as the embedded SQL database program.
The users can now view the nonrelational database as a relational database.
Phase III. Data conversion.
Step 3.1. Unload reconstructed hierarchical database into sequential files.
Since this phase converts the data to a relational database, a relational schema
is needed. For each partially internally identified and unidentified record type, the
record identifiers are composite keys that include foreign keys. For the fully inter-
Search WWH ::
Custom Search