[SQL] PostgreSQL : COUNT(1/*/column) 구분해보자 일단 Docs를 보면 https://www.postgresql.org/docs/9.5/functions-aggregate.html Aggregate Functions Aggregate functions compute a single result from a set of input values. The built-in normal aggregate functions are listed in Table 9-49 and Table 9-50. The built-in ordered-set aggregate functions are listed in Table 9-51 and Table 9-52. Grouping operatio www.postgresql.org 정의 자체가 count(*)이면 그냥 전체 row 수.. 이전 1 다음
