我有这个工作正常的现有查询:
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
现在我需要添加一些东西。我有另一个名为的表
event_message_idx
,其中包含列recipe_id
、lot_id
、tool_id
、
date_time
和message_idx
。
我需要找出该表中有多少行以及有多少行message_idx = 'OM'
加入message_idx = 'SEM'
了上述查询 on
recipe_id, lot_id, tool_id
and has date_time between start and end
。
我无法弄清楚如何在一个查询中执行此操作(我真的更喜欢子查询,因为这些表非常大,并且过去在这个系统上子查询性能很差)。
我一直在玩这样的左连接:
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
但是这里有两个问题:
- 我得到了我想要的行数的两倍 - 一个用于 OM,一个用于 SEM
我不想这样——我只想知道有多少 OM 和 SEM 行(真的我只想知道是否有 0 或更多然后 0——实际计数无关紧要)。
我没有考虑日期范围 - 我只想计算 event_message_idx 中介于 start 和 end 之间的行,我不知道该怎么做。
这可能吗?我认为不是,我必须使用 2 个查询(这确实会使应用程序复杂化)或一个子查询(我也在努力编写)。