group functions in sql

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showing results for - "group functions in sql"
Alessio
05 Apr 2018
1GROUP BY: is used to collaborate
2with the SELECT statement to arrange 
3matching data into groups.
4
5ORDER BY: is for sorting result
6either in descending or ascending order.
Hendrik
05 Mar 2019
1 SELECT column_name(s)
2  FROM table_name
3  WHERE condition
4  GROUP BY column_name(s)
5  HAVING condition
6  ORDER BY column_name(s); 
Chiara
17 Jul 2016
1/*Group by clause is used to group a selected  set of rows into a set of summary 
2rows by the values of one or more column or expression. It is always used in
3Conjunction with one or more aggregate function.*/
4SELECT AGGREGATE_FUNCTION(Column_Name) FROM Table_Name
5/*Group by exmaple*/
6SELECT city, sum(Salary) as TotalSalary FROM tblEmployee GROUP BY City
Enrico
14 Jan 2018
1-- It accepts a single column as a parameter and returns "1" 
2-- if the column contains a null value generated  as part of a
3-- subtotal by a ROLLUP or CUBE operation or "0" for any other value,
4-- including stored null values
5
6SELECT fact_1_id,
7       fact_2_id,
8       SUM(sales_value) AS sales_value,
9       GROUPING(fact_1_id) AS f1g, 
10       GROUPING(fact_2_id) AS f2g
11FROM   dimension_tab
12GROUP BY CUBE (fact_1_id, fact_2_id)
13HAVING GROUPING(fact_1_id) = 1 OR GROUPING(fact_2_id) = 1
14ORDER BY GROUPING(fact_1_id), GROUPING(fact_2_id);
Edoardo
13 Oct 2018
1Multiple Row Functions (Group functions, Aggregate functions):
2(Count, MIN , MAX, AVG, SUM)
3will run for multiple rows and return a single value
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