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
A run-unit is a logical unit of work; it is analogous to a CICS task.
An OOK-Rec is a one of a kind record set, used to get to another record set
Latest Answer: OOK-REC - it is IDD metaschema record. IDD metaschema is generating during installiation time ...
A junction record is a member record type that allows for many-to-many relationship between its two owner records. For a school database the CLASS record is a junction for the TEACHER and SUBJECT record
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 ...
A set is an owner record and, optionally, its member records. There are three types of pointers: next, prior and owner, but only next is required. There are five possible orders for arrangements of sets;
Latest Answer: A.By Codasyl conception SET is data chain between Owner and Member record. B.Pointers: NEXT,PRIOR,OWNER(direct adresation to OWNER_RECORD from MEMBER).At least NEXT pointer is requered to navigate via set.C. Number of sets really is unlimited. ...
The READY prepares a database area for access by DML functions.
It writes a checkpoint to the Journal File and releases any record locks.
Latest Answer: It completes a LUW. In case of DB2 changes made to database will not take effect untill a COMMIT statement is encountered. ...
It rolls back (reverses) all database updates to the point of the last rollback or to the beginning of the run-unit.
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