Question

I have two tables 'Account_Position' and 'Account' linked with a column 'Account_id'.

for one entry of 'Account_id' in table 'Account' we have multiple entries in 'Account_Position' table.

I want to show all the records of 'Account' table based on how many times they have occurred in 'Account_Position' table.

How can I show that.

Thanks in advance.

Answer 1

Try this,

-- if you are using MSSQL, this query won't work because of 
-- asterisk in the select clause (you need to specify all the fields)
-- in the group by clause
-- (but it will work on MySQL)
SELECT  a.*, COUNT(b.Account_ID) totalOccurence   
FROM    Account a
            LEFT JOIN Account_Position b
                ON a.Account_ID = b.Account_ID
GROUP BY a.Account_ID

OR

-- alternatively, you can use this.
SELECT  c.*
FROM    Account c
        (               
            SELECT  a.Account_ID, COUNT(b.Account_ID) totalOccurence
            FROM    Account a
                        LEFT JOIN Account_Position b
                            ON a.Account_ID = b.Account_ID
            GROUP BY a.Account_ID
        ) d ON c.Account_ID = d.Account_ID