如何使用Linq或EF来对数据去重
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按需求,直接选一个吧
GROUP:
Employees
.GroupBy (e => e.JobTitle)
.Select (
g =>
new
{
JobTitle = g.Key,
TotalVacations = g.Sum (e => (Int32)(e.VacationHours))
}
)
Distinct:
Employees
.Select (e => e.JobTitle)
.Distinct ()
GROUP:
Employees
.GroupBy (e => e.JobTitle)
.Select (
g =>
new
{
JobTitle = g.Key,
TotalVacations = g.Sum (e => (Int32)(e.VacationHours))
}
)
Distinct:
Employees
.Select (e => e.JobTitle)
.Distinct ()
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