Sql count if

Sql count

/*COUNT(column_name) will return the number of rows from the column 
that are not NULL*/
SELECT COUNT(column_name)
FROM table_name;

/*COUNT(*) will return the number of rows from the table*/
SELECT COUNT(*)
FROM table_name;

Condition in count sql

select count(case Position when 'Manager' then 1 else null end)
from ...


select sum(case Position when 'Manager' then 1 else 0 end)
from ...

Sql count if

COUNT(CASE WHEN <condition> THEN 1 END)

-1

Source: modern-sql.com

Sql count condition

SELECT count(CASE WHEN gender = 'F' THEN 1 ELSE NULL END) women_count,
       count(CASE WHEN gender = 'M' THEN 1 ELSE NULL END) men_count
FROM people;

-2

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