/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 vote315 views1 answer
Running mysql from bash sc
SQL
0 vote177 views1 answer
Sql select all records from all tables where not empty
SQL
0 vote185 views1 answer
Print intervals of 15 minutes in sql query
SQL
0 vote169 views1 answer
Null column as zero in mysql
SQL
1 vote201 views2 answers
Mysql add column tinyint default 0
SQL
0 vote175 views1 answer
Postgresql auto increment not working
SQL
1 vote208 views1 answer
Sample clause in sql
SQL
0 vote200 views1 answer
Sql insert from excel
SQL
4 votes160 views2 answers
Mysql how to change default charset
SQL
19 votes178 views6 answers
Sql create table
SQL