Sql count where

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;

To count number of rows in SQL table

SELECT count(*)
FROM information_schema.columns
WHERE table_name = 'Your_table_nale';

Sql count(*)

SELECT COUNT(column_name)
FROM table_name
WHERE condition;

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 ...

Counting in sql

SELECT COUNT(*) FROM EMPLOYEES;

Sql count where

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 vote117 views1 answer
Create table with timestamp mysql youtube
SQL
0 vote114 views1 answer
Mariadb hours between two dates
SQL
0 vote108 views1 answer
Renommer schema sql
SQL
0 vote116 views1 answer
Sql server 2012 create or alter procedure
SQL
3 votes121 views2 answers
Postgres alter table owner
SQL
1 vote116 views2 answers
OSError: mysql_config not found mysql_config --version mariadb_config --version mysql_config --libs ---------------------------------------- ERROR: Command errored out with exit status 1: python setup.py egg_info Check the logs for full command outpu
SQL
1 vote126 views1 answer
Nvl postgres
SQL
2 votes120 views1 answer
Sql ends with string
SQL
0 vote117 views1 answer
Isnull in sqlite
SQL
0 vote112 views1 answer
Why mysql is used?
SQL