https://www.postgresqltutorial.com › postgresql-aggregate-functions › postgresql-sum-function

Learn how to use the PostgreSQL SUM() function to calculate the sum of values in a set, with or without the DISTINCT option. See examples of using the SUM() function with SELECT, GROUP BY, HAVING, and expressions.

https://www.postgresql.org › docs › current › functions-aggregate.htm

Computes the “ sum of products ” of independent times dependent variables, sum(X*Y) - sum(X) * sum(Y)/N. Yes regr_syy ( Y double precision , X double precision ) → double precision

https://www.w3schools.com › postgresql › postgresql_sum.php

The SUM() function returns the total sum of a numeric column. The following SQL statement finds the sum of the quantity fields in the order_details table: Example. Return the total amount of ordered items: SELECT SUM (quantity) FROM order_details; Run Example » Note: NULL values are ignored. PostgreSQL Exercises. Test Yourself With Exercises.

https://docs.postgresql.fr › 16 › functions-aggregate.html

Calcule la « somme des carrés » de la variable indépendante, sum(X^2) - sum(X)^2/N. Oui regr_sxy ( Y double precision , X double precision ) → double precision

https://docs.postgresql.fr › 11 › functions-aggregate.html

En particulier, une somme (sum) sur aucune ligne renvoie NULL et non zéro, et array_agg renvoie NULL plutôt qu'un tableau vide quand il n'y a pas de lignes en entrée. La fonction coalesce peut être utilisée pour substituer des zéros ou un tableau vide aux valeurs NULL quand cela est nécessaire.

https://www.postgresql.org › docs › current › tutorial-agg.html

An aggregate function computes a single result from multiple input rows. For example, there are aggregates to compute the count, sum, avg (average), max (maximum) and min (minimum) over a set of rows. As an example, we can find the highest low-temperature reading anywhere with: SELECT max(temp_lo) FROM weather; max. ----- 46. (1 row)

https://docs.postgresql.fr › 13 › functions-aggregate.html

Calcule la « somme des produits » des variables dépendantes heures indépendantes, sum(X*Y) - sum(X) * sum(Y)/N. Yes regr_syy ( Y double precision , X double precision ) → double precision

https://postgresql-tutorial.com › postgresql-sum-function

The SUM function in PostgreSQL is used to return the sum of values. Here’s the syntax to return the sum of values in a column: SELECT SUM(column_name) FROM table_name; where column_name is the name of the column you want to sum and table_name is the name of the table containing the column.

https://www.techonthenet.com › postgresql › functions › sum.php

The PostgreSQL sum function returns the summed value of an expression. Syntax. The syntax for the sum function in PostgreSQL is: SELECT sum(aggregate_expression) FROM tables. [WHERE conditions]; OR the syntax for the sum function when grouping the results by one or more columns is: SELECT expression1, expression2, ... expression_n,