Why key(attributes or set of attributes to identify attribute instance uniquely) plays significant role in the DB?👍🏻✔ 02:00 accessing the data (maybe you want to select single record out of millions of records in DM) for processing >> National Way to identify a record: Check the value of a specific attribute of record. >> Note: Value of Key's attribute should not be same with value of other key's attribute. >> Note: Most of the times we don't create an Entity Type, it exists there, we have to identify key's attribute👍🏻 _____________ 11:10 key serves two purposes: (Presents the information stored in it i.e, metre no), (Identify a record from others)
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Why key(attributes or set of attributes to identify attribute instance uniquely) plays significant role in the DB?👍🏻✔
02:00 accessing the data (maybe you want to select single record out of millions of records in DM) for processing
>> National Way to identify a record: Check the value of a specific attribute of record.
>> Note: Value of Key's attribute should not be same with value of other key's attribute.
>> Note: Most of the times we don't create an Entity Type, it exists there, we have to identify key's attribute👍🏻
_____________
11:10 key serves two purposes: (Presents the information stored in it i.e, metre no), (Identify a record from others)
👍🏻
Excellent Sir 👌
Good