表名:单词
字段:wId,引理,relatedId
数据:
0苹果1
1馅饼-1
预期结果:
wId = 0
引理=苹果
relatedWord = pie
答案 0 :(得分:1)
此查询可以执行您想要的操作。据我所知,你的表单词包含relatedld和wld之间的外键。所以这个查询应该满足你的需求:
SELECT t1.wld as wld,
t1.lemma as lemma,
t2.wld as relatedWorld
FROM words t1 JOIN words t2 ON t1.relatedld = t2.wld;
答案 1 :(得分:1)
您可以参考Here
详情如下:
create table words (wId integer,
lemma varchar(100),
relatedId Integer);
Insert Into words values(0,'apple',1),(1,'pie',-1);
select t1.WID,t1.lemma as Lemma,t2.lemma as relatedWord
from words t1,words t2
where t1.RelatedID = t2.WID