https://vonng.com/en/tags/sql/Recent content in SQL on VonngHugo -- gohugo.ioenrh@vonng.com (Ruohang Feng)rh@vonng.com (Ruohang Feng)© 2025 Ruohang FengFri, 06 Apr 2018 00:00:00 +0000https://vonng.com/en/pg/sql-distinct-on/Fri, 06 Apr 2018 00:00:00 +0000rh@vonng.com (Ruohang Feng)https://vonng.com/en/pg/sql-distinct-on/Use Distinct On extension clause to quickly find records with maximum/minimum values within groupshttps://vonng.com/en/pg/sql-exclude/Fri, 06 Apr 2018 00:00:00 +0000rh@vonng.com (Ruohang Feng)https://vonng.com/en/pg/sql-exclude/Exclude constraint is a PostgreSQL extension that can implement more advanced and sophisticated database constraints.