I am exploring a very messy SQL-Database via LINQPAD and I would like to get a list of all tables where at least one column is of type string. Furthermore, I would like to compute the count of distinct values for each column mentioned above.
I have tried to jumble something together, but my LINQ is rusty and anyway I have used it mainly for LINQ to Objects...
foreach(var table in Mapping.GetTables())
{
(
from dm in table.RowType.DataMembers
where dm.Type == typeof(string)
select new { dm.Name , dm.DbType , dm.Type , dm.MappedName, dm.IsPrimaryKey }
)
}
Anonymous User
17-Feb-2015from table in Mapping.GetTables()
from member in table.RowType.DataMembers
where member.Type == typeof(string)
let count = ExecuteQuery<int>(String.Format(
"SELECT COUNT(DISTINCT {0}) FROM {1}",
member.Name,
table.TableName)).FirstOrDefault()
select new { table.TableName, member.Name, count }