asked on

count with join statement...

I have two tables as follows:
Table-01
id        Date
1001      11/1/2014
1002      12/1/2014
1003      11/12/2014
1004      11/28/2014
1005      11/14/2014
1006      11/29/2014
1007      11/14/2014
1008      12/10/2014
1009      12/12/2014
1010      12/12/2014
1011      12/8/2014

Table-02
id status
1001      Started
1002      Started
1003      Started
1004      In Progress
1005      Complete
1006      Complete
1007      Complete
1007      Approved
1008      Approved
1009      Approved
1010      Complete
1011      Complete

I need to get an output that will be give me the count status depending on the date from table-01.

For eg, If I need the count of status for date >= 12/12/2014, I am looking for an output as follows:

Approve 1
Completed 1
Started null
in Progress null

Can someone let me know how this can be done, thank you.

A

Robert Sherman

This will get you the ones that have values... it doesn't return the ones that are null.

SELECT Table2.status, Count(Table2.status) AS CountOfstatus
FROM Table1 INNER JOIN Table2 ON Table1.id = Table2.id
WHERE (((Table1.when)>=#12/12/2014#))
GROUP BY Table2.status;

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aej1973

ASKER

Is there a ".when" clause in MySQL also, what is this # symbol? I tried the following statement but it did not work:

SELECT table2.status, Count(table2.status) AS CountOfstatus
FROM table1 INNER JOIN table2 ON table1.id = table2.id
WHERE ((table1.when)>=#12/12/2014#)
GROUP BY table2.status

The error is :
#1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'GROUP BY table2.status LIMIT 0, 30' at line 4

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Robert Sherman

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Robert Sherman

Also, if you need a query that returns null for those values in status that have no records within the date range you specify, it gets a little more complicated.

Do you have the values for status stored in a separate table? (one with four rows containing 'Approved' 'Started' 'In Progress' 'Complete') If you do, you could use a left join from that table to a sub-query containing the query I posted above. For example, if the lookup table is called 'status_tbl':

Select a.status, b.CountOfstatus from status_tbl as a LEFT JOIN 
      (
       SELECT Table2.status, Count(Table2.status) AS CountOfstatus
           FROM Table1 INNER JOIN Table2 ON Table1.id = Table2.id
           WHERE (((Table1.when)>=#12/12/2014#))
           GROUP BY Table2.status;
      )  AS b ON a.status = b.status;

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aej1973

ASKER

Sherman, looks like for the second query you have not done it with MySQL :-). Thank you very much for your help. I am taking a look at this.

A

aej1973

ASKER

Sherman, thank you. I was able to figure it out with the guidance you gave me. Thanks again for the help.

A