[英]SQL query count and distinct year
Hi I am trying to do the following query. 嗨,我正在尝试执行以下查询。 Basically im trying to count all musicians that exist that are born in 1990.
基本上,我试图统计所有出生于1990年的音乐家。
SELECT COUNT(MusicianID),
COUNT(DISTINCT CASE WHEN year(DateOfBirth)=1990)
FROM Musician
SELECT COUNT(MusicianID)
FROM Musician
WHERE YEAR(DateOfBirth)=1990
Select count(musicianid)
from musician
Where year(date of birth) = 1990
try this 尝试这个
SELECT COUNT(MusicianID) As allmusicians
FROM Musician
WHERE year(DateOfBirth) = 1990
This will work: 这将起作用:
SELECT COUNT(MusicianID)
FROM Musician
WHERE YEAR(DateOfBirth)=1990
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