Mysql Update based on value and select query - mysql

Question

I want to make a UPDATE on tb_usermeta using one query, having meta_id, meta_key's and meta_value's. This is possible?
tb_usermeta:
+----+---------+-----------+------------+
| id | meta_id | meta_key | meta_value |
+----+---------+-----------+------------+
| 1 | 1 | user_nome | user 1 |
| 2 | 1 | user_fone | 99999 |
| 3 | 2 | user_nome | user 2 |
| 4 | 2 | user_fone | 88888 |
+----+---------+-----------+------------+
Ex: Data:
meta_id = 1, meta_key = user_nome, meta_value = user changed
meta_id = 1, meta_key = user_fone, meta_value = 696969
tb_usermeta after update:
+----+---------+-----------+-------------+
| id | meta_id | meta_key | meta_value |
+----+---------+-----------+-------------+
| 1 | 1 | user_nome | user changed|
| 2 | 1 | user_fone | 696969 |
| 3 | 2 | user_nome | user 2 |
| 4 | 2 | user_fone | 88888 |
+----+---------+-----------+-------------+

Answer 1

Consider the following...
DROP TABLE IF EXISTS eav;
CREATE TABLE eav
(entity INT NOT NULL
,attribute VARCHAR(12) NOT NULL
,value VARCHAR(20) NOT NULL
,PRIMARY KEY(entity,attribute)
);
INSERT INTO eav VALUES
(1,'user_nome','user 1'),
(1,'user_fone','99999'),
(2,'user_nome','user 2'),
(2,'user_fone','88888');
UPDATE eav
SET value = CASE attribute WHEN 'user_nome' THEN 'user changed'
WHEN 'user_fone' THEN '696969'
END
WHERE entity = 1;
SELECT * FROM eav;
+--------+-----------+--------------+
| entity | attribute | value |
+--------+-----------+--------------+
| 1 | user_nome | user changed |
| 1 | user_fone | 696969 |
| 2 | user_nome | user 2 |
| 2 | user_fone | 88888 |
+--------+-----------+--------------+
It would be nice to do this with a view - but I think MySQL would consider the fact that you're updating two things at once 'an update to multiple underlying tables', which is not allowed.