转自：http://blog.csdn.net/bogues/article/details/152708
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條件:
TableName: material
Field Name : serial_number,group_name,lot_id
Date Example:
1 10001, MB_MD, MBID000001
2 10001, TVE_MD, TVEID000001
3 10001, MODEM_MD, MODEMID000001
4 10002, MB_MD, MBID000002
5 10002, TVE_MD, TVEID000002
6 10002, MODEM_MD, MODEMID000002
7 10003, MB_MD, MBID000003
8 10003, TVE_MD, TVEID000003
9 10003, MODEM_MD, MODEMID000003
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SQL:
select serial_number ,max(decode(group_name,'MB_MD',lot_id,'')) MB_MD,
max(decode(group_name,'TVE_MD',lot_id,'')) TVE_MD,
max(decode(group_name,'MODEM_MD',lot_id,'')) MODEM_MD
from material
group by serial_number
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結果:
serial_number MB_MD TVE_MD MODEM_MD
10001, MBID000001, TVEID000001, MODEMID000001
10002, MBID000002, TVEID000002, MODEMID000002
10003, MBID000003, TVEID000003, MODEMID000003