我在桌子上有这个值:
id|field_id|value_text
1| 1| msk
1| 2| anton
1| 4| adm@site.com
2| 1| spb
2| 2| serg
2| 4| rr@sk.ru
3| 1| rng
3| 2| moya
3| 4|ore@kole.com
我怎么能这样:
id|city|name|email
1|msk|anton|adm@site.com
2|spb|serg|rr@sk.ru
请帮忙!
答案 0 :(得分:0)
这看起来像是要pivot
表
尝试
SELECT
id,
MAX(CASE WHEN field_id = 1 THEN value_text END) AS city,
MAX(CASE WHEN field_id = 2 THEN value_text END) AS name,
MAX(CASE WHEN field_id = 4 THEN value_text END) AS email
FROM tbl
GROUP BY id