The schema is the physical arrangement of the data as it appears in the DBMS. The subschema is the logical view of the data as it appears to the application program.
Latest Answer : Schema : RePresents the complete desription of the databasesubschema - subset of schema,application view of the idms db ...
A record occurrence is the instances of a record; it is the smallest addressable unit of data. A type is the description of a record; there need not be any occurrences.
In local there is no IDMS System running above the DBMS. It is the more efficient mode but lacks the recovery and integrity facilities of the central version (CV) control program. In CV many application
Calc is based on a symbolic value which is used to determine the target page. Via mode is for members only. Via records are stored near to their owners. In direct mode the target is specified by the
Latest Answer : three modes calc,via,direstcalc: here any fileld value in the record is converted into a combination of page no and line no by means of a hashing algo... to be staright one can access the record directly by means of thsi field valuevia : here the ...
No. The mode is specified via the SYSCTL DD card in the JCL.
If you are current on the owner of a set, what is the difference between an obtain next and obtain first?
No difference. There is a difference between obtain first and obtain next for an area sweep, but not when current on the owner in a set.