oracle sql developer中的IIF语句
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IIF statement in oracle sql developer
提问by user2623359
Have an access query that i'm trying to convert to oracle sql dev. and seems that i have my error at IIf(vw_gdp_currentqry.LOC='0300','F','P') AS SRCE,can someone help please
有一个我正在尝试转换为 oracle sql dev 的访问查询。似乎我在 IIf(vw_gdp_currentqry.LOC='0300','F','P') AS SRCE 有错误，有人可以帮忙吗
SELECT
vw_gdp_currentqry.YEAR,
vw_gdp_currentqry.LOC,
**IIf(vw_gdp_currentqry.LOC='0300','F','P') AS SRCE,**
vw_gdp_currentqry.METHOD,
vw_gdp_currentqry.current_value
FROM vw_gdp_currentqry
WHERE vw_gdp_currentqry.IND)='TOT';
回答by Robert
Try decodefunction
试用decode功能
SELECT
vw_gdp_currentqry.YEAR,
vw_gdp_currentqry.LOC,
decode (vw_gdp_currentqry.LOC,'0300', 'F', 'P' ) AS SRCE,
vw_gdp_currentqry.METHOD,
vw_gdp_currentqry.current_value
FROM vw_gdp_currentqry
WHERE vw_gdp_currentqry.IND='TOT';
or with casesyntax
或使用case语法
SELECT
vw_gdp_currentqry.YEAR,
vw_gdp_currentqry.LOC,
case vw_gdp_currentqry.LOC
when '0300' then 'F'
else 'P'
end AS SRCE,
vw_gdp_currentqry.METHOD,
vw_gdp_currentqry.current_value
FROM vw_gdp_currentqry
WHERE vw_gdp_currentqry.IND='TOT';
More information
更多信息
回答by Skorpion
a combination of NULLIF and NVL2. You can only use this if vw_gdp_currentqry.LOC is NOT NULL, which it is in your case:
NULLIF 和 NVL2 的组合。您只能在 vw_gdp_currentqry.LOC 不为 NULL 时使用它，这就是您的情况：
SELECT
vw_gdp_currentqry.YEAR,
vw_gdp_currentqry.LOC,
nvl2(nullif(vw_gdp_currentqry.LOC,'0300'),'P','F'),
vw_gdp_currentqry.METHOD,
vw_gdp_currentqry.current_value
FROM vw_gdp_currentqry
WHERE vw_gdp_currentqry.IND='TOT';
