How to count occurrences of a column value efficiently in SQL?
How to count occurrences of a column value efficiently in SQL? Asked 16 years, 1 month ago Modified 1 year, 7 months ago Viewed 711k times
sql - Is it possible to specify condition in Count ()? - Stack Overflow
607 Is it possible to specify a condition in Count()? I would like to count only the rows that have, for example, "Manager" in the Position column.
sql - How to get count of CTE result? - Stack Overflow
Nov 9, 2016 · A CTE can hold temporary result set that is defined within the execution scope of a single SELECT, INSERT, UPDATE, DELETE. You cannot have another SELECT outside the …
sql - Multiple COUNT () for multiple conditions in one query …
Sep 27, 2013 · 1 I think this can also works for you select count(*) as anc,(select count(*) from Patient where sex='F')as patientF,(select count(*) from Patient where sex='M') as patientM …
Count number of records returned by group by - Stack Overflow
Jun 16, 2016 · How do I count the number of records returned by a group by query, For eg: select count(*) from temptable group by column_1, column_2, column_3, column_4 Gives me, 1 1 2 I …
How to count instances of character in SQL Column
Apr 20, 2017 · I have an sql column that is a string of 100 'Y' or 'N' characters. For example: YYNYNYYNNNYYNY... What is the easiest way to get the count of all 'Y' symbols in each row.
sql - Select count (*) from multiple tables - Stack Overflow
36 My experience is with SQL Server, but could you do: select (select count(*) from table1) as count1, (select count(*) from table2) as count2 In SQL Server I get the result you are after.
sql - count (*) vs count (column-name) - which is more correct?
Jun 9, 2010 · To be exact, COUNT (column) counts rows in which values of column is not NULL, whereas COUNT (*) counts all rows of the table.
sql - How to use count and group by at the same select statement ...
Apr 27, 2010 · I have an SQL SELECT query that also uses a GROUP BY, I want to count all the records after the GROUP BY clause filtered the resultset. Is there any way to do this directly …
using sql count in a case statement - Stack Overflow
Aug 29, 2015 · Added this solution, as I came here while searching for how to classify and count data in one statement. Using a double select you can get a query that has the count and the …