postgres crosstable - ghdrako/doc_snipets GitHub Wiki https://www.sqlshack.com/how-to-use-the-crosstab-function-in-postgresql/ https://stackoverflow.com/questions/3002499/postgresql-crosstab-query https://medium.com/@KagundaJM/how-to-transform-sql-queries-to-crosstabs-in-postgresql-3b9d8797d679