sql - Selecting COUNT(*) with DISTINCT - Stack Overflow
Count all the DISTINCT program names by program type and push number. SELECT program_type AS [Type], Count(DISTINCT program_name) AS [Count], FROM cm_production WHERE push_number = @push_number GROUP BY program_type DISTINCT COUNT(*) will return a row for each unique count.
SQL to find the number of distinct values in a column
Apr 5, 2019 · SELECT DISTINCT my_col, count(*) OVER (PARTITION BY my_col ORDER BY my_col) AS num_rows FROM my_tbl Using this OVER based approach is of course optional. In the above SQL, I found specifying DISTINCT and ORDER BY to be necessary.
sql - COUNT DISTINCT with CONDITIONS - Stack Overflow
Dec 27, 2012 · SELECT COUNT(DISTINCT tag) AS tag_count, COUNT(DISTINCT tag) FILTER (WHERE entryID > 0) AS positive_tag_count FROM your_table_name; This generalizes to all aggregate functions. Share
sql - Counting DISTINCT over multiple columns - Stack Overflow
Sep 24, 2009 · 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(DISTINCT CONCAT(DocumentId, ':', DocumentSessionId)).
SQL Server how can I use COUNT DISTINCT (*) in HAVING clause?
Apr 19, 2016 · USE MyCompany; GO SELECT COUNT(DISTINCT orderid) AS NumberOfOrdersMade, customerid AS CustomerID FROM tblItems_Ordered GROUP BY customerid HAVING COUNT(DISTINCT orderid) > 1 GO When outside of the COUNT, the DISTINCT will eliminate duplicate rows from a result set, which will have no effect in your …
SQL count(*) and distinct - Stack Overflow
Dec 1, 2009 · COUNT() takes no parameters and cannot be used with DISTINCT. COUNT() does not require an expression parameter because, by definition, it does not use information about any particular column. COUNT(*) returns the number of rows in a specified table without getting rid of duplicates. It counts each row separately.
Using DISTINCT and COUNT together in a MySQL Query
Nov 11, 2014 · SELECTING DISTINCT PRODUCT AND DISPLAY COUNT PER PRODUCT for another answer about this type of question, this is my way of getting the count of product based on their product name using distinct. Here a sample: List of Product : select * FROM Product Product Name Count Using Distinct :
sql - Getting Count Only of Distinct Value Combinations of …
Jun 8, 2013 · SELECT COUNT(*) AS cnt FROM ( SELECT 1 AS d FROM Customer GROUP BY Customername, Planet ) AS t ; Tested in SQL-Fiddle. An index on (CustomerName, Planet) would be used, see the query plan (for 2012 version): The simplest to think, "get all distinct values in a subquery, then count" , yiields the same identical plan:
SQL: Distinct count in where clause? - Stack Overflow
Dec 5, 2011 · If you try to use COUNT in the WHERE clause, SQL will throw an exception. You can only use an aggregate function if it is within a sub-query contained in a HAVING clause or a select list. SELECT fk_customer, COUNT(*) FROM …
sql - MySQL distinct count if conditions unique - Stack Overflow
Oct 30, 2013 · My SQL DISTINCT and count if. 1. MySQL query DISTINCT, COUNT. 0. MySQL - Count only if unique. 1.