The mean age, in years, of first marriage for women. Women who never married are excluded. Cohabitation is excluded. The data are based on multple sources and definitions might vary.

HOW TO JOIN WITH METADATA

• Concepts (labels/units)
– Use the concept id age_at_1st_marriage_women to look up labels and units in @gapminder.metadata.concepts.
SELECT * FROM @gapminder.metadata.concepts WHERE concept = 'age_at_1st_marriage_women'.

• Countries and names
– Join your datapoints on geo to @gapminder.metadata.entities_geo_country to get readable country/area names
(e.g., name) and membership attributes such as world_4region, income_groups.

• Regions and other group labels
– After you have a region code from the country table (e.g., world_4region),
you can join to:
· @gapminder.metadata.entities_geo_world_4region on world_4region → region names/colors/shapes
· @gapminder.metadata.entities_geo_world_6region on world_6region → region names
· @gapminder.metadata.entities_geo_income_groups on income_groups → income group names

Example:
SELECT d.time,
c.name AS country,
d.age_at_1st_marriage_women AS value
FROM @gapminder.age_at_1st_marriage_women.age_at_1st_marriage_women_by_geo_time d
LEFT JOIN @gapminder.metadata.entities_geo_country c ON d.geo = c.country;