/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 vote337 views1 answer
Rabbitmq service not starting
SQL
11 votes340 views2 answers
Having clause
SQL
1 vote316 views1 answer
Oracle boolean to varchar
SQL
13 votes378 views3 answers
List all the tables in sql
SQL
0 vote346 views1 answer
Can we rollback data that are deleted using DELETE
SQL
0 vote344 views1 answer
Modificar tipo de dato sql server
SQL
3 votes393 views2 answers
Truncate table
SQL
0 vote363 views1 answer
Grant privileges mysql to database 1064
SQL
-1 vote371 views1 answer
Select first rows postgresql
SQL
0 vote345 views1 answer
Using GROUP BY in MySQL Join Table
SQL