这个SELECT FROM WHERE ORDER BY mysql语法有什么问题?

1 mysql syntax-error

返回语法错误,但我不明白错误在哪里...注意:dtadd是一个TIMESTAMP

SELECT codigo, quantidade, preco_unitario
FROM romaneios_detalhes 
WHERE id_romaneio = '.$idr.' 
SORT BY dtadd ASC
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mar*_*ton 7

应该ORDER BY不是SORT BY.