Package: postgresql-11-first-last-agg Source: first-last-agg Version: 0.1.4-4-gd63ea3b-6.pgdg18.04+1 Architecture: i386 Maintainer: Debian PostgreSQL Maintainers Installed-Size: 43 Depends: postgresql-11 Homepage: https://github.com/wulczer/first_last_agg Priority: optional Section: database Filename: pool/main/f/first-last-agg/postgresql-11-first-last-agg_0.1.4-4-gd63ea3b-6.pgdg18.04+1_i386.deb Size: 8424 SHA256: c3c6843aaf4427c64e4a85cdaf8804318ea96cc6f70cb90b5b4c8e47787fdc8c SHA1: 3982443ac49abe06dc020cb5ea622b70a5f131fc MD5sum: 88e9ddfedcb1dd005368ff338f1974f0 Description: PostgreSQL extension providing first and last aggregate functions first-last-agg is a simple extension providing two aggregate functions, last and first, operating on any element type and returning the last or the first value of the group. . Since by default the ordering inside groups created by a GROUP BY expression is not defined, it is advisable to use an ORDER BY clause inside the aggregate expression (see the aggregate function syntax).