Mysql函數實戰

1.group_concat

場景:一對多的查詢,電影有多個類型,把多個類型拼裝到一條電影語句查詢裏面

sql:

SELECT
  f.id,
  f.name,
  f.english_name,
  f.filmStatus,
  group_concat(t.name SEPARATOR ',')
FROM jk_film f
  , relation r
  , jk_type t
WHERE r.src = f.id AND r.dst = t.id AND f.status = 1 AND r.status = 1 AND t.status = 1 AND t.category = 1 AND
      r.relationType = 14
GROUP BY f.id