Examlex
Because the computations for different market indexes are essentially the same,it really doesn't matter which index is used to determine how the performance of your investment portfolio compares to the market.
Foreign Key
A field in a database table that creates a link between two tables, identifying a row in another table to establish a relationship.
Primary Key
A unique identifier for each record in a database, used to ensure that each row represents a unique instance of the entity modeled by the table.
Secondary Key
A database attribute used for sorting and/or indexing data, which is not the primary key.
Relational Database Model
Data model based on the simple concept of tables in order to capitalize on characteristics of rows and columns of data.
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