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

0 vote301 views1 answer
Is there any limit of using joins in single mysql query ?
SQL
1 vote266 views1 answer
Mysql average of multiple columns
SQL
0 vote270 views1 answer
Postgres: Create Column add constraint to the column with Query Output
SQL
1 vote315 views2 answers
Sql server backup table
SQL
1 vote333 views1 answer
Create email address from first and last name in sql
SQL
1 vote272 views1 answer
Mysql Case sum
SQL
0 vote312 views1 answer
Create a plsql object
SQL
0 vote286 views1 answer
Selecting Data in SQL - Select Data
SQL
3 votes307 views1 answer
APEX elapsed time
SQL
0 vote305 views1 answer
Savepoint mysql script
SQL