前 10 个名字 - 多个表（联合）- SQL

Question

我想要数据库中最常出现的前 10 个名字，其中有几个 table

对于 1 table:

SELECT n.prenomsNouveauNe, COUNT(*)
FROM <database>.naissance n
GROUP BY n.prenomsNouveauNe
ORDER BY COUNT(*) DESC
LIMIT 10

对于多个 tables:

(
 SELECT
  n.prenomNouveauNe, COUNT(*)
  FROM
   <database>.naissance n
   group by n.prenomsNouveauNe
)
UNION ALL
(
 SELECT
  d.prenomDefunt, count(*)
  FROM
   <database>.deces d
   group by d.prenomDefunt
)

但是我进不了前10...

Answer 1

select theName, count(*) as cnt from
(
 SELECT
  n.prenomNouveauNe as theName
  FROM
   genearmor.naissance n
UNION ALL
 SELECT
  d.prenomDefunt as theName
  FROM
   <database>.deces d
) tmp
group by theName
order by count(*) desc
limit 10;

前 10 个名字 - 多个表（联合）- SQL

Top 10 Firstnames - Multiple tables (Union) - SQL

sql

union

limit