2 small queries vs 1 big

[Roman Ivanov]

Will there be a significant performance difference between 1 complex query and 2 simple queries? (Assuming that such queries will be used many times.)

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SELECT u.id, u.name, u.info, g.id, g.name, g.logo
FROM user AS u, group AS g
WHERE u.id = '12'
AND g.id = u.groupId

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SELECT u.id, u.groupId, u.name, u.info
FROM user AS u
WHERE u.id = '12'

SELECT g.id, g.name, g.logo
FROM group AS g
WHERE g.id = '3'

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