The Standardized World Income Inequality Database (SWIID) takes a Bayesian approach to  standardizing observations collected from the OECD Income Distribution Database, the SocioEconomic Database for Latin America and the Caribbean generated by CEDLAS and the World Bank, Eurostat, the World Bank’s PovcalNet, the UN Economic Commission for Latin America and the Caribbean, national statistical offices around the world, and many other sources. Luxembourg Income Study data serves as the standard. ——文件里的介绍
具体的网站可以直接Google数据库的名字就行了https://fsolt.org/swiid/

SWIID是只有两个指标吗？

同学你指的是哪两个指标？可以去看看instruction~