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Statistical data

The Statistics Division prepares general statistical data compilations in print, including the Statistical Yearbook , Monthly Bulletin of Statistics , and statistical data compilations in special fields, including demographic and population statistics, international merchandise trade, national accounts, industrial commodities production, energy, social statistics and indicators, gender statistics and human settlements.

Standards and methods

The division also prepares a wide variety of technical studies on international statistical standards, recommendations and special studies approved by the Statistical Commission. United Nations publications on statistical standards and methods are usually available in English, French, Arabic, Chinese, Russian and Spanish.

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Statistical Yearbook

Comprehensive compilation of internationally available statistics on social and economic conditions and activities, at world, regional and national levels.

World Statistics Pocketbook

Annual compilation of over 50 key statistical indicators presented in one-page profiles for 30 world geographical regions and over 200 countries or areas of the world.

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Current economic and social statistics for more than 200 countries and territories of the world.

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United Nations sales publications are identified by sales numbers and series numbers. Sales publications may be purchased from bookstores and distributors throughout the world, or online from the United Nations Publications website.

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Many publications and databases are available in DENIM Denim outerwear Junya Watanabe Free Shipping How Much For Sale Online Store Discount Amazing Price Sneakernews Classic 2Qzwobcys
. Most out-of-print publications in English are available in microfiche from the United Nations Publications.

Government and research institutions

Single copies of publications currently in print in Arabic, Chinese and Russian are available at no charge to Governments and research institutions in statistics from the Director of the Statistics Division in New York, as long as stock is available.

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The United Nations Statistics Division is committed to the advancement of the global statistical system. We compile and disseminate global statistical information, develop standards and norms for statistical activities, and support countries' efforts to strengthen their national statistical systems. We facilitate the coordination of international statistical activities and support the functioning of the United Nations Statistical Commission as the apex entity of the global statistical system.

If , the field is allowed to be blank. Default is .

Note that this is different than Free Shipping Explore zippocket straight dress Black Mara Mac Cheap Sale Amazing Price Clearance Big Sale OaVXpKWj
. is purely database-related, whereas Sale Fake Very Cheap For Sale Womens Lily WoodGrainPattern Bikini Bottom Onia FUa9LU0
is validation-related. If a field has , form validation will allow entry of an empty value. If a field has , the field will be required.

An iterable (e.g., a list or tuple) consisting itself of iterables of exactly two items (e.g. [(A, B), (A, B) ...] ) to use as choices for this field. If this is given, the default form widget will be a select box with these choices instead of the standard text field.

The first element in each tuple is the actual value to be set on the model, and the second element is the human-readable name. For example:

Generally, it’s best to define choices inside a model class, and to define a suitably-named constant for each value:

Though you can define a choices list outside of a model class and then refer to it, defining the choices and names for each choice inside the model class keeps all of that information with the class that uses it, and makes the choices easy to reference (e.g, Student.SOPHOMORE will work anywhere that the Student model has been imported).

You can also collect your available choices into named groups that can be used for organizational purposes:

The first element in each tuple is the name to apply to the group. The second element is an iterable of 2-tuples, with each 2-tuple containing a value and a human-readable name for an option. Grouped options may be combined with ungrouped options within a single list (such as the unknown option in this example).

For each model field that has Sleeveless Top Hexagram 12 Pi by VIDA VIDA Cheapest Price For Sale Outlet Amazing Price Online IeNWEzrj
set, Django will add a method to retrieve the human-readable name for the field’s current value. See get_FOO_display() in the database API documentation.

Note that choices can be any iterable object – not necessarily a list or tuple. This lets you construct choices dynamically. But if you find yourself hacking choices to be dynamic, you’re probably better off using a proper database table with a Discount Codes Really Cheap Finishline Cheap Price Womens Sublim Dentelle Slip Taille Haute Briefs Dim Clearance Store Cheap Online Original Sale Free Shipping Oi3Jwc3
. choices is meant for static data that doesn’t change much, if ever.

Unless blank=False is set on the field along with a Sale Online Shopping side stripe track pants Black Ganni Discount 2018 Newest Cheap Sale Original hcKOM
then a label containing "---------" will be rendered with the select box. To override this behavior, add a tuple to choices containing None ; e.g. (None, 'Your String For Display') . Alternatively, you can use an empty string instead of None where this makes sense - such as on a CharField .

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