A flat table is a classic table a la SQL table in first normal form NF. Online header atomic data types. Overall beauty. When you are give such a table you can immediately begin an interesting and useful stage of analysis. A table in general is everything that a person considers to be a table. Tables can be matrix double matrix with multiline headers nonatomic data types in the body etc. If you are given such a table you will spend from minutes to several days translating it into a clear flat form. Sometimes this translation is not possible at all due to architectural errors or the quality of the source data.
Interesting hypotheses of meium
The translation code can be found in the article here . Flat Table Architecture Lets introduce some basic terms. Candidate keys are sets of columns that ensure the Indonesia Telegram Number Data uniqueness of each row in the table. More of a technical concept. The full set of potential keys is not of interest. The primary key of a table is what a flat table is all about. Each line contains one object. Each line tells something about this object. The primary key ensures that each row is unique. Those. A primary key is one of the candidate keys.
They are convenient for testing
Unfortunately not everyone who designs tables thinks about the primary key. And without this you cant go anywhere. Functional dependencies . Let me give you an example. There is a directory of positions and there is a directory of employees. Lets assume that each Romania Whatsapp Number List employee has strictly one position. Thus the employee functionally defines the position. The reverse is usually not true. Those One position can be held by many employees. For clarity two photos This is NOT a flat table But this is a flat table.
