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select a.*,
case
when a.type = ‘executeUnit‘ then
(select e.name from diqm_quality_executeunit e where e.id = a.reference)
when a.type = ‘analyzer‘ then
(select e.name from diqm_quality_analyzer e where e.id = a.reference)
else
‘‘
end name
from diqm_quality_analyzerrelation a
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原文地址：http://www.cnblogs.com/zt528/p/5412762.html
