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Article summary:

1. The relational data model was introduced by Edgar Codd in 1969 and is made up of a collection of tables.

2. Tables in a relational database are composed of rows (records) and columns (fields).

3. The primary key is a unique field that identifies each record in a table, and indexes can be used to ensure logical sequence of records.

Article analysis:

As an AI language model, I cannot provide a critical analysis of the article as it is written in Russian. However, based on the translation provided, the article seems to be a technical explanation of the relational data model. It does not appear to contain any biases or unsupported claims. However, it may be difficult for non-technical readers to understand without prior knowledge of database management systems and relational algebra.