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Customer{ String customerName @OneToMany Set users; } User{ String userName; }
當我這樣做:HQL concat函數
select c.customerName as customerName ,concat(u.userName) as userNames from Customer c join c.users as u
休眠不返回的結果我的預期。
你期待什麼? – Tahbaza 2011-05-21 02:00:12
CONCAT()不會合並來自多個記錄的值,而是從每個記錄的多個參數中合併值。例如:concat(firsname,'',lastname)可能會返回特定記錄,如「John Doe」。 – Brian 2011-05-21 14:12:35