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Saber o max() de duas colunas


fnds
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Boas!

Eu tenho uma tabela que tem duas colunas numéricas, o que eu queria fazer era uma query que retorna-se o maior valor das duas juntas.

Eu qeria fazer algo deste género (isto dá erro...):

SELECT max(
SELECT max(`c1`) as numero from `tabela` WHERE `id`=46
UNION
SELECT max(`c2`) as numero from `tabela` WHERE `id`=46
)

A parte do meio funciona, agora quando ponho o max() de fora não :s

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Estás quase lá 😉

Select max(numero)
From 
( Select max(`c1`) as numero from `tabela` WHERE `id`=46
  UNION
  Select max(`c2`) as numero from `tabela` WHERE `id`=46
) as t

"Give a man a fish and he will eat for a day; Teach a man to fish and he will eat for a lifetime. The moral? READ THE MANUAL !"

Sign on a computer system consultant's desk

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