Contents
What are ISO country codes used for?
The purpose of ISO 3166 is to define internationally recognized codes of letters and/or numbers that we can use when we refer to countries and their subdivisions.
Are ISO country codes unique?
Each complete ISO 3166-2 code can then be used to uniquely identify a country subdivision in a global context.
What is ISO country code of birth?
ISO 3166-2:IN is the entry for India in ISO 3166-2, part of the ISO 3166 standard published by the International Organization for Standardization (ISO), which defines codes for the names of the principal subdivisions (e.g., provinces or states) of all countries coded in ISO 3166-1.
Are country codes standard?
ISO 3166-1 (Codes for the representation of names of countries and their subdivisions – Part 1: Country codes) is a standard defining codes for the names of countries, dependent territories, and special areas of geographical interest.
What is the ISO country code for the United States?
USA
United States/ISO code
What does unsupported ISO 3166 country mean?
The reported error “Java.Lang.IllegalArgumentException: Unsupported ISO 3166 country: en” occurs when the default Region/Language in the Locale property is not provided and only one value is set.
What is the 3 digit country code for the United States?
USA is the three-letter country abbreviation for United States.
Is Kosovo an ISO country?
Kosovo
| ISO 3166-1 numeric – | ISO 3166-1 alpha-3 – |
|---|---|
| E.164 code(s) +383 | IOC country code KOS |
| E.212 mobile country code(s) 212 | NATO Three-letter code – |
| ITU Maritime ID(s) – | ITU letter code(s) – |
| GS1 GTIN prefix(es) – | UNDP country code KOS |
Which country is SGP?
Singapore
| Republic of Singapore show 3 other official names | |
|---|---|
| Motto: Majulah Singapura (Malay) (English: “Onward Singapore”) | |
| Anthem: Majulah Singapura (English: “Onward Singapore”) Menu 0:00 | |
| Official languages | English Malay Mandarin Tamil |
| National language | Malay |
When to use integer or string for primary keys?
For example, if a table was to hold foreign keys of geographical locations like India or Indiana (state) then the primary key abbreviations may be IND for India or INDA for Indiana which in first glance can be as confusing as numeric values. My rule has always been to stick to integer unless string keys are required.
When to use ” PersonID ” as a foreign key?
If you used the name “PersonID” for the ID in the Person table and consistently used that name as a foreign key, it is trivial to write a query against the schema to find out what tables have PersonID without having to infer that “PersonID” is the name used when it is a foreign key.
Can a wildcard match be used for a foreign key?
Remember, right or wrong, foreign key relationships are not always enforced in all projects. There is an edge case where one table may need to have two foreign keys to the same table, but in such cases I would put the original key name as the suffix name for the column, so a wildcard match, %PersonID, could easily find those instances as well.
Which is the best data type for primary key?
Numeric value is always a good choice for Key. But important thing is that, no matter whatever you are using (number/string/stamp) but it should meet your business requirement 100%. For your problem, if you are only worried about your leading zero.