IMS DB stores data at different levels. Data is retrieved and inserted by issuing DL/I calls from an application program. We will discuss about DL/I calls in detail in the upcoming chapters. Data can be processed in the following two ways:
When segments are retrieved sequentially from the database, DL/I follows a predefined pattern. Let us understand the sequential processing of IMS DB.
listed below are the factors to be aware of sequential processing:
Random processing is also known as direct processing of data in IMS DB. Let us take an example to understand random processing in IMS DB:
listed under are the factors to observe about random processing:
As mentioned, simplest a single field can be used as a key subject. in case you want to search for the contents of other phase fields which are not key fields, then the sector that is used to retrieve the information is referred to as a search field.
IMS/DB Related Interview Questions
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IMS/DB Related Practice Tests
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