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2. sql - Is it possible to specify condition in Count()? - Stack...

   stackoverflow.com/questions/1400078

   After I answered (or may be the same time), many people answered the similar thing and they do not get any downvote. /: (. – NawaMan. Sep 9, 2009 at 14:50. 4. You get a downvote because the question is "specify condition in Count" NOT "Count values by condition". So you are answering the wrong question.

3. Finding duplicate values in a SQL table - Stack Overflow

   stackoverflow.com/questions/2594829

   HAVING COUNT(*) > 1. The GROUP BY clause groups the rows into groups by values in both name and email columns. Then, the COUNT () function returns the number of occurrences of each group (name,email). Then, the HAVING clause keeps only duplicate groups, which are groups that have more than one occurrence. 2.

4. How to count occurrences of a column value efficiently in SQL?

   stackoverflow.com/questions/1503959

   28. If you're using Oracle, then a feature called analytics will do the trick. It looks like this: select id, age, count(*) over (partition by age) from students; If you aren't using Oracle, then you'll need to join back to the counts: select a.id, a.age, b.age_count. from students a. join (select age, count(*) as age_count.

5. SQL to find the number of distinct values in a column

   stackoverflow.com/questions/141562

   746. You can use the DISTINCT keyword within the COUNT aggregate function: SELECT COUNT(DISTINCT column_name) AS some_alias FROM table_name. This will count only the distinct values for that column. edited Aug 28, 2013 at 13:46. rstackhouse. 2,326 25 29. answered Sep 26, 2008 at 19:54. Noah Goodrich.

6. MySQL - Using COUNT(*) in the WHERE clause - Stack Overflow

   stackoverflow.com/questions/301793

   10. COUNT (*) can only be used with HAVING and must be used after GROUP BY statement Please find the following example: SELECT COUNT(*), M_Director.PID FROM Movie. INNER JOIN M_Director ON Movie.MID = M_Director.MID. GROUP BY M_Director.PID. HAVING COUNT(*) > 10.

7. Sql Server equivalent of a COUNTIF aggregate function

   stackoverflow.com/questions/582637

   3. It's 2022 and latest SQL Server still doesn't have COUNTIF (along with regex!). Here's what I use: -- Count if MyColumn = 42. SELECT SUM(IIF(MyColumn = 42, 1, 0)) FROM MyTable. IIF is a shortcut for CASE WHEN MyColumn = 42 THEN 1 ELSE 0 END.

8. How to count instances of character in SQL Column

   stackoverflow.com/questions/1860457

   If you want to count the number of instances of strings with more than a single character, you can either use the previous solution with regex, or this solution uses STRING_SPLIT, which I believe was introduced in SQL Server 2016.

9. SQL count(*) and distinct - Stack Overflow

   stackoverflow.com/questions/1826120

   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.

10. sql - Selecting COUNT (*) with DISTINCT - Stack Overflow

    stackoverflow.com/questions/1521605

    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. What you want is COUNT(DISTINCT <expression>): evaluates expression for each row in a group and returns the number of unique, non-null values.

11. SQL: Count() based on column value - Stack Overflow

    stackoverflow.com/questions/17194145

    Yes. Count doesn't count NULL values, so you can do this: COUNT('x') as Everything, COUNT(case when OutcomeID = 36 then 'x' else NULL end) as Sales, COUNT(case when OutcomeID <> 36 then 'x' else NULL end) as Other. YourTable. Alternatively, you can use SUM, like bluefeet demonstrated.