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

Similar codes

3 votes207 views1 answer
How to get yesterday date in sql
SQL
1 vote129 views1 answer
Oracle sql assign unique number to each grouping
SQL
0 vote161 views1 answer
SQLSTATE[01000]: Warning: 1265 Data truncated for column 'job_type' at row 1 (SQL: insert into
SQL
11 votes161 views2 answers
Oracle saurce code
SQL
0 vote145 views2 answers
What is the library that should import to use all functional database features in SQLite?
SQL
0 vote143 views2 answers
Select limit ms sql
SQL
18 votes151 views3 answers
'Client does not support authentication protocol requested by server; consider upgrading MySQL client', sqlState: '08004',
SQL
0 vote101 views1 answer
How to get last client id sql
SQL
3 votes142 views1 answer
Postgres update column with value from another table
SQL
2 votes139 views1 answer
Oracle run_duration average
SQL