//先做基本查询
var querySql = from l in _logClinicDataOperationRepository.Table
select new LogClinicDataOperationInfo
{
LogSeq = l.LogSeq,
TypeCode = l.TypeCode,
CreateDate = l.CreateDate
};
//条件在基本的查询中完成
if (query.CreateDateStart != null)
{
querySql = querySql.Where(t => t.CreateDate >= query.CreateDateStart);
}
if (query.CreateDateEnd != null)
{
querySql = querySql.Where(t => t.CreateDate <= query.CreateDateEnd);
}
//然后把基本的条件过滤后的查询语句去分组
var ret = querySql.GroupBy(t => new { t.TypeCode }).Select(s => new LogClinicDataOperationInfo
{
//分组后的数据如果想去count,就用托管变量s去调用count的方法,不是querySql去掉用
LogSeq = s.Sum(m => m.LogSeq),
//这里显示的是普通的字段,注意的是这里的s.Key如果分组字段只有一个的话,可以只写s.Key,如果分组字段有多个的话,语句如下:
//var ret = querySql.GroupBy(t => new { t.TypeCode,t.ClientKind }).Select(s => new LogClinicDataOperationInfo
//{
//
// LogSeq = s.Sum(m => m.LogSeq),
// ClientKind=s.Key.ClientKind
// TypeCode = s.Key.TypeCode
//});
TypeCode = s.Key.TypeCode
});