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select中的条件语句 oracle

2010-12-27 15:19:53| 分类： IT | 标签： |举报 |字号大中小订阅

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表person，字段csrq

查询：0-15岁、16-25岁、26-35岁、36-59岁、60岁以上人员

select
case when (MONTHS_BETWEEN(SYSDATE, csrq) < 180) then 1
     when (MONTHS_BETWEEN(SYSDATE, csrq) < 300) then 2
     when (MONTHS_BETWEEN(SYSDATE, csrq) < 420) then 3
     when (MONTHS_BETWEEN(SYSDATE, csrq) < 720) then 4
     when (MONTHS_BETWEEN(SYSDATE, csrq) >= 720) then 5
else
    -1
end

from person

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