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Pandas (styled as pandas) is a software library written for the Python programming language for data manipulation and analysis. In particular, it offers data structures and operations for manipulating numerical tables and time series. It is free software released under the three-clause BSD license. [2]
Data-Type Constraints: values in a particular column must be of a particular data type, e.g., Boolean, numeric (integer or real), date. Range Constraints: typically, numbers or dates should fall within a certain range. That is, they have minimum and/or maximum permissible values. Mandatory Constraints: Certain columns cannot be empty.
In a database, a table is a collection of related data organized in table format; consisting of columns and rows . In relational databases, and flat file databases, a table is a set of data elements (values) using a model of vertical columns (identifiable by name) and horizontal rows, the cell being the unit where a row and column intersect. [1]
In 2022, after a 20-year-long mystery, the ASPCA Poison Control Center veterinarians identified tartaric acid as the compound that makes grapes toxic to dogs. This compound is also in sultanas ...
ISO 8601 is an international standard covering the worldwide exchange and communication of date and time -related data. It is maintained by the International Organization for Standardization (ISO) and was first published in 1988, with updates in 1991, 2000, 2004, and 2019, and an amendment in 2022. [1] The standard provides a well-defined ...
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National standard format is yyyy-mm-dd. dd.mm.yyyy format is used in some places where it is required by EU regulations, for example for best-before dates on food and on driver's licenses. d/m format is used casually, when the year is obvious from the context, and for date ranges, e.g. 28-31/8 for 28–31 August.
if the modifier applies to only one of the two endpoints of the range, use a spaced en dash: 150 BCE – 50 BCE, 5 BC – 12 AD, c. 1393 – 1414; if the modifier applies to the range as a whole, disregard the modifier: 150–50 BCE, reigned 150 BCE – 50 BCE, reigned 150–50 BCE, r. c. 1393 – 1414, r. 1393–1414.