Deepak Mahto builds some rows:
A ROW expression allows you to construct ROW values, which can represent anonymous records, specific table row types, or custom composite types. Its uses include processing records within multiple expressions (using operators like =, <>, <, <=, >, or >=), evaluation with subqueries, and combining ROW values to build composite types. You can even export these to JSON format (using functions like
rowtojson). Some key operations you can perform with a ROW constructor in Conversion or migration are :
Click through for that list and several examples.