/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 vote320 views1 answer
How to get all values in a table mysql in c#
SQL
3 votes324 views1 answer
Sql server check version
SQL
0 vote334 views1 answer
Create dump file mysql workbench
SQL
1 vote327 views1 answer
Pagination sql
SQL
2 votes316 views1 answer
Oracle sql drop table purge
SQL
11 votes339 views2 answers
Insert current date sql
SQL
11 votes336 views1 answer
Oracle view ddl
SQL
2 votes326 views1 answer
Merge two columns in sql oracle
SQL
2 votes348 views1 answer
Postgresql resolv duplicate value violates unique constraint
SQL
0 vote364 views2 answers
Execute stored procedure without db set
SQL