Aggregate functions are a subset of SQL functions that compute a single value from multiple input rows, mostly used in `SELECT` queries with a `GROUP BY` clause.
I have a problem with a query in Oracle SQL. I have a first_name column in an employees table. …
sql group-by aggregate-functionsOkay, I probably could have come up with a better title, but wasn't sure how to word it so let …
sql oracle group-by aggregate-functionsI'm experiencing a problem with MySQL's "GROUP_CONCAT" function. I will illustrate my problem using a simple help desk database: …
sql mysql join aggregate-functions group-concatI have a task to count the quantity of users having count of comments > X. My SQL-query looks like …
mysql sql subquery aggregate-functionsI'm sure this has been asked but I can't quite find the right search terms. Given a schema like this: | …
sql sql-server aggregate-functionsLet's say you want do something along the following lines: SELECT CASE WHEN (SELECT COUNT(id) FROM table WHERE column2 = 4) &…
sql sql-server count aggregate-functions select-caseI have this query to get the number of PlayerSessions with reconnect = TRUE, grouped by Player.country: SELECT country, COUNT(*) …
mysql sql count subquery aggregate-functionsQuestion: I want to write a custom aggregate function that concatenates string on group by. So that I can do …
sql sql-server-2005 sql-server-2008 aggregate-functions aggregationI'm working with some data that is currently stored in 1 minute intervals that looks like this: CREATE TABLE #MinuteData ( [Id] …
sql-server group-by aggregate-functions sql-server-2014 analytic-functionsI know that if you have one aggregate function in a SELECT statement, then all the other values in the …
sql aggregate-functions