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這裏基本的hiberate問題,我想爲用戶提供的列使用sum()聚合函數,我已經嘗試了下面的查詢,但它似乎不起作用,有人能夠啓發我嗎?Hibernate:setParameter sum()
public Long clientCustomQuery(String option, Date startDate, Date endDate){
StringBuilder sb = new StringBuilder("select sum(:option) from Session as s ");
sb.append("where s.date >= :startDate and s.date <= :endDate");
Query query = this.getEntityManager().createQuery(sb.toString());
query.setParameter("option", option);
query.setParameter("startDate", startDate);
query.setParameter("endDate", endDate);
return (Long)query.getSingleResult();
}
感謝
大衛
好的,謝謝,點字符串連接 – DaveB 2012-01-05 19:46:03