Adding new table to existing query - sql

Question

I have this existing query that works fine:
SELECT data_tool.name as tool,
MIN(data_cst.date_time) "start",
MAX(data_cst.date_time) "end",
data_cst.recipe_id,
data_target.name as target,
data_lot.name as lot,
data_wafer.name as wafer,
data_measparams.name as mp
FROM data_cst
INNER JOIN data_tool ON data_tool.id = data_cst.tool_id
INNER JOIN data_target ON data_target.id = data_cst.target_name_id
INNER JOIN data_lot ON data_lot.id = data_cst.lot_id
INNER JOIN data_wafer ON data_wafer.id = data_cst.wafer_id
INNER JOIN data_measparams ON data_measparams.id = data_cst.meas_params_name_id
WHERE data_target.id IN (130, 539)
AND data_cst.date_time BETWEEN '2010-01-11 00:00:00' AND '2013-01-11 23:59:59'
AND data_cst.tool_id IN (14,16)
GROUP BY wafer_id, data_cst.lot_id, data_file_id, target_name_id
HAVING count(*) < 100
ORDER BY start, tool
Now I need to add something to it. I have another table called
event_message_idx that has columns recipe_id, lot_id, tool_id,
date_time, and message_idx.
I need to find out how many rows in that table have message_idx = 'OM'
and how many have message_idx = 'SEM' joined with the above query on
recipe_id, lot_id, tool_id and has date_time between start and end.
I have not been able to figure out how to do this in one query (which
I'd really perfer to a sub query as these tables are very large and
the subquery performance has been poor in the past on this system).
I've been playing around with a left join like this:
SELECT data_tool.name as tool,
MIN(data_cst.date_time) "start",
MAX(data_cst.date_time) "end",
data_cst.recipe_id,
data_target.name as target,
data_lot.name as lot,
data_wafer.name as wafer,
data_measparams.name as mp,
event_message_idx.message_idx,
COUNT(event_message_idx.message_idx)
FROM data_cst
LEFT JOIN event_message_idx
ON event_message_idx.recipe_id = data_cst.recipe_id
AND event_message_idx.message_idx IN ('OM', 'SEM')
AND event_message_idx.lot_id = data_cst.lot_id
AND event_message_idx.tool_id = data_cst.tool_id
INNER JOIN data_tool ON data_tool.id = data_cst.tool_id
INNER JOIN data_target ON data_target.id = data_cst.target_name_id
INNER JOIN data_lot ON data_lot.id = data_cst.lot_id
INNER JOIN data_wafer ON data_wafer.id = data_cst.wafer_id
INNER JOIN data_measparams ON data_measparams.id = data_cst.meas_params_name_id
WHERE data_target.id IN (130, 539)
AND data_cst.date_time BETWEEN '2010-01-11 00:00:00' AND '2013-01-11 23:59:59'
AND data_cst.tool_id IN (14,16)
GROUP BY wafer_id, data_cst.lot_id, data_file_id, target_name_id,
event_message_idx.message_idx
HAVING count(*) < 100
ORDER BY start, tool
But there are 2 issues here:
I get double the number of rows I want - one for OM and one for SEM
I don't want that - I just want to know how many OM and SEM rows
there are (really I just want to know if there are 0 or more then 0 -
the actual count doesn't matter).
I am not taking the date range into account - I only want to count
rows from event_message_idx that are between start and end and I can't
figure out how to do that.
Is this possible? I'm thinking it's not and I've have to use 2 queries (which will really complicate the app), or a subquery (which I'm also struggling to write).

Answer 1

calculate those in a subquery, eg
SELECT data_tool.name as tool,
MIN(data_cst.date_time) "start",
MAX(data_cst.date_time) "end",
data_cst.recipe_id,
data_target.name as target,
data_lot.name as lot,
data_wafer.name as wafer,
data_measparams.name as mp,
COALESCE(a.totalOM, 0) totalOM,
COALESCE(a.totalSEM, 0) totalSEM
FROM data_cst
INNER JOIN data_tool
ON data_tool.id = data_cst.tool_id
INNER JOIN data_target
ON data_target.id = data_cst.target_name_id
INNER JOIN data_lot
ON data_lot.id = data_cst.lot_id
INNER JOIN data_wafer
ON data_wafer.id = data_cst.wafer_id
INNER JOIN data_measparams
ON data_measparams.id = data_cst.meas_params_name_id
LEFT JOIN
(
SELECT recipe_id, lot_id, tool_id,
SUM(CASE WHEN message_idx = 'OM' THEN 1 ELSE 0 END) totalOM,
SUM(CASE WHEN message_idx = 'SEM' THEN 1 ELSE 0 END) totalSEM
FROM event_message_idx
WHERE date_time BETWEEN '2010-01-11 00:00:00' AND '2013-01-11 23:59:59'
GROUP BY recipe_id, lot_id, tool_id
) a ON data_cst.recipe_id = a.recipe_id AND
data_cst.lot_id = a.lot_id AND
data_cst.tool_id = a.tool_id
WHERE data_target.id IN (130, 539) AND
(data_cst.date_time BETWEEN '2010-01-11 00:00:00' AND '2013-01-11 23:59:59') AND
data_cst.tool_id IN (14,16)
GROUP BY wafer_id, data_cst.lot_id, data_file_id, target_name_id
HAVING COUNT(*) < 100
ORDER BY `start`, tool