how to organize country data?
how do i organize country data (c开发者_如何学编程ountries, states and cities etc) in mysql?
cause every country has 3 tables: countries, states and cities.
should i have each country in separate set of tables or should i have them all in these 3 tables? if i have all of them in same tables, im afraid that the amount of rows will be huge cause i tend to have a lot of countries!
what is best practice for this?
Here's one way:
country:
country_id (INT) | country_name (VARCHAR)
state:
state_id (INT) | country_id (INT) | state_name (VARCHAR)
city:
city_id (INT) | country_id (INT) | state_id (INT) | city_name (VARCHAR)
countryTable(countryId(PK),countryName)
stateTable(stateId(PK),stateName,belongCountryId(FK))
cityTable(cityId(PK),cityTable,belongStateId(FK))
you can use "Cascade query" or Create "View" to get information from these 3 tables.
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