使用SPARQL進行計數：如何在一行中獲得結果？

Question

試圖讓三個（或更多計數結果在同一個SPARQL查詢：

SELECT 
    ?cs 
    ?bs 
    ?ws 
WHERE { 
    { SELECT (COUNT(?c) AS ?cs) WHERE { ?c a :OneThing . }} 
    UNION 
    { SELECT (COUNT(?b) AS ?bs) WHERE { ?b a :AnotherThing . } } 
    UNION 
    { SELECT (COUNT(?w) AS ?ws) WHERE { ?w a :ThirdThing . } } 
} 

但是，它會更好，如果有隻有一行的結果，而不是三個（和計數的對角線）。嘗試不同的表情都無濟於事。

可以這樣用SPARQL高效地完成？我覺得我失去了一些東西明顯...

Answer 1

這是否做的伎倆？

SELECT (COUNT(?c) AS ?cs) (COUNT(?b) AS ?bs) (COUNT(?w) AS ?ws) 
WHERE { 
    { ?c a :OneThing . } 
    UNION 
    { ?b a :AnotherThing . } 
    UNION 
    { ?w a :ThirdThing . } 
}