Join help

Hi,

I am running a helpdesk system with mysql 4.0.16. At the end of every day a PHP script captures / imports the total number of calls by priority and status.

I need to build a report that shows this.

The problem I have is if that no one logs a High priority call then it will not show in my report. My report needs to show all priorities , I would then configure the report to show a zero if there were no calls for a certain priority.

 So I created a new table with a list of priorities, which included UK-HIGH, UK-MEDIUM, UK-LOW, UK-ONHOLD

I then left joined this table to the table that has the stored amount of calls. My statement looks like this -

Supportworks Sql> SELECT
    -> dailyreport_priority.priority,
    -> FROM_UNIXTIME(timex,"%Y-%m-%d") as Date,
    -> snapshot.fk_company_id,
    -> snapshot.amount,
    -> snapshot.priority
    -> snapshot
    -> left join dailyreport_priority on snapshot.priority =  dailyreport_priority.priority
    -> where fk_company_id = "abc uk"
    -> and FROM_UNIXTIME(timex,"%Y-%m-%d") BETWEEN CURDATE() - INTERVAL 30 DAY AND CURDATE()
    -> ;
+--------------+------------+---------------+--------+--------------+

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The outcome was this:

+--------------+------------+---------------+--------+--------------+
| priority     | Date       | fk_company_id | amount | priority     |
+--------------+------------+---------------+--------+--------------+
| UK- Low  | 2012-02-22 | ABC UK       |      2 | UK- Low  |
| UK- Low  | 2012-02-23 | ABC UK       |      2 | UK- Low  |
| UK- Low  | 2012-02-24 | ABC UK       |      1 | UK- Low  |
| UK- Low  | 2012-03-06 | ABC UK       |      3 | UK- Low  |
| UK- Low  | 2012-03-07 | ABC UK       |      2 | UK- Low  |
| UK- Low  | 2012-03-08 | ABC UK       |      4 | UK- Low  |
| UK- Low  | 2012-03-09 | ABC UK       |      6 | UK- Low  |
| UK- Low  | 2012-03-10 | ABC UK       |      3 | UK- Low  |
| UK- Low  | 2012-03-11 | ABC UK       |      3 | UK- Low  |
| UK- Low  | 2012-03-12 | ABC UK       |      3 | UK- Low  |
| UK- Low  | 2012-03-14 | ABC UK       |      5 | UK- Low  |
| UK- Low  | 2012-03-15 | ABC UK       |      2 | UK- Low  |
| UK- Low  | 2012-03-16 | ABC UK       |      3 | UK- Low  |
| UK- Low  | 2012-03-17 | ABC UK       |      1 | UK- Low  |
| UK- Low  | 2012-03-18 | ABC UK       |      1 | UK- Low  |
| UK- Low  | 2012-03-19 | ABC UK       |      1 | UK- Low  |
| UK- High | 2012-03-21 | ABC UK       |      1 | UK- High |
+--------------+------------+---------------+--------+--------------+

Open in new window


 I thought a left join would show all of my priorities.
Can anyone help?
LVL 2
Dan560Asked:
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netjgrnautCommented:
If I'm reading your (implied) FROM correctly in your query...

-> (FROM) snapshot
-> left join dailyreport_priority on snapshot.priority =  dailyreport_priority.priority

Open in new window


...then you have your join backwards.  You want a RIGHT join to show all the rows in the *second* table (dailyreport_priority).

Refer to this tutorial...

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