/SQL/Sql count number of rows after group by

Sql count number of rows after group by

Sql count matching group by

# To count the number of teachers in each department, including 
# rows where COUNT(t.name) == 0
SELECT d.name,COUNT(t.name) FROM teacher t
RIGHT JOIN dept d ON (t.dept=d.id) GROUP BY d.name;

Source: sqlzoo.net

Sql count number of rows after group by

Select Count(*)
From    (
        Select ...
        From TempTable
        Group By column_1, column_2, column_3, column_4
        ) As Z

Source: stackoverflow.com

Similar codes

0 vote136 views1 answer
Delet all record statment sql
SQL
0 vote123 views1 answer
Sqlalchemy.exc.OperationalError:
SQL
0 vote111 views1 answer
How to get data between a last week in mysql
SQL
0 vote112 views1 answer
Sqlalchemy sequence postgresql
SQL
0 vote124 views1 answer
Querry mysql by 2 columns
SQL
11 votes121 views1 answer
Mysql text type max length
SQL
0 vote122 views1 answer
Oracle list datafiles
SQL
8 votes135 views2 answers
Grant all privileges database postgres to user
SQL
0 vote121 views1 answer
QUERY JPQL
SQL
0 vote130 views1 answer
Mysql url data type
SQL