Can I use Max and count together in SQL?
Can I use MAX(COUNT()) in SQL? I came across an interesting SQL challenge that looked easy first and then proved to be a bit tricker than expected. And the short answer to the above question is, no. You can’t.
How do I find the maximum number of occurrences in SQL?
select * from emp where empid in (select manager from (select manager, count(*) from emp group by 1 having count(*) = (select max(count) from (select manager, count(*) as count from emp group by 1) x) ) y ); This will also return multiple rows in case there is a tie for the most number of employees.
How do I count distinct occurrences in SQL?
To count the number of different values that are stored in a given column, you simply need to designate the column you pass in to the COUNT function as DISTINCT . When given a column, COUNT returns the number of values in that column. Combining this with DISTINCT returns only the number of unique (and non-NULL) values.
How do I count multiple distinct values in SQL?
SQL databases can work with tuples like values so you can just do: SELECT COUNT(DISTINCT (DocumentId, DocumentSessionId)) FROM DocumentOutputItems; If your database doesn’t support this, it can be simulated as per @oncel-umut-turer’s suggestion of CHECKSUM or other scalar function providing good uniqueness e.g. COUNT( …
How do you SELECT Max count?
To get one row with the highest count, you can use ORDER BY ct LIMIT 1 : SELECT c. yr, count(*) AS ct FROM actor a JOIN casting c ON c. actorid = a.id WHERE a.name = ‘John Travolta’ GROUP BY c.
Can we use MAX function in WHERE clause?
MAX() function with Having The SQL HAVING CLAUSE is reserved for aggregate function. The usage of WHERE clause along with SQL MAX() have also described in this page. The SQL IN OPERATOR which checks a value within a set of values and retrieve the rows from the table can also be used with MAX function.
Can we use count and distinct together in SQL?
Yes, you can use COUNT() and DISTINCT together to display the count of only distinct rows.
Why DESC is used in SQL?
The DESC command is used to sort the data returned in descending order.