我想在Criteria api中写一些SQL:
SELECT CASE
WHEN total_pages = 0 THEN '0 pages'
WHEN total_pages BETWEEN 1 AND 3 THEN '1-3 pages'
WHEN total_pages BETWEEN 4 AND 6 THEN '4-6 pages'
WHEN total_pages > 6 THEN '7 + pages'
END AS pagerange, sum(total_pages) AS 'Total'
FROM dbo.connector_log_entry
GROUP BY
CASE
WHEN total_pages = 0 THEN '0 pages'
WHEN total_pages BETWEEN 1 AND 3 THEN '1-3 pages'
WHEN total_pages BETWEEN 4 AND 6 THEN '4-6 pages'
WHEN total_pages > 6 THEN '7 + pages'
END
ORDER BY pagerange
答案 0 :(得分:0)
var groupBy = @"
CASE
WHEN total_pages = 0 THEN '0 pages'
WHEN total_pages BETWEEN 1 AND 3 THEN '1-3 pages'
WHEN total_pages BETWEEN 4 AND 6 THEN '4-6 pages'
WHEN total_pages > 6 THEN '7 + pages'
END";
var pagerange = Projections.SqlGroupProjection(groupBy + " pagerange",
groupBy,
new[] { "pagerange" },
new[] { NHibernateUtil.String });
var results = session.CreateCriteria<ConnectorLogEntry>()
.SetProjection(pagerange,
Projections.Sum("TotalPages"))
.List();
这假定您的类名为ConnectorLogEntry
,而映射到total_pages列的属性称为TotalPages
。
我欠你ORDER BY位,但你总是可以对客户端进行排序。