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SQL JOIN several tables help required

SQL JOIN several tables help required

SQL JOIN several tables help required

Hi guys,

I've so far had no luck getting help or solving this on my own! I have four tables which I need to join together. They are


metricID    processID    name

R3451        1.01        Metric1
R7764        1.01        Metric2
R0443        1.01        metric3

metricID    processID    orgID

R3451        1.01        mydemo
R7764        1.01        mydemo

metricID    processID    answer    year

R3451        1.01        12.34    2007
R7764        1.01        114.55    2007

metricID    orgID    target    year

R3451        mydemo    13.00    2007

SO - I need ALL the records from the METRICS_CUSTOM_REPORT table based on the processID, then I need to look up the name from METRICS table. I then need ANY records in the METRICS_CALCULATED_ANSWERS and METRICANSWERS table (IF they exists). There will ALWAYS be a record in METRICS which matches the ID number from METRICS_CUSTOM_REPORT table.

Here's what I have so far - but I cannot get in the metricanswers table. What am I doing wrong?


FROM metrics_custom_report c
LEFT JOIN metrics m ON c.metricID = m.metricID
LEFT JOIN metric_calculated_answers mca ON mca.metricID = c.metricID
WHERE c.orgID='$orgID' AND
c.processID='$processID' AND
c.orgID='$orgID' AND
m.processID='$processID' AND
mca.processID='$processID' AND mca.orgID='$orgID' AND mca.year='$year'
GROUP BY m.metricID

Thanks for any help.

RE: SQL JOIN several tables help required

You might something like the following:

SELECT    C.*, M.name
FROM      metrics_custom_report C, metrics M
LEFT JOIN metric_calculated_answers A ON A.processID = C.processID
LEFT JOIN metricanswers W ON W.metricid = C.metricid
WHERE     C.metricid = M.metricid
GROUP BY  C.metricid
ORDER BY  C.metricid

Good Luck
As a circle of light increases so does the circumference of darkness around it. - Albert Einstein

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