Using Entity Framework, how to create a query which will fetch the column names of all tables from a database

Question

How to create a dynamic select query in C# using Entity Framework which will fetch all the column names from a SQL database. Here, the table names to be supplied in the query are fetched from a generic list of type IEnumerable<string>

There's a list mylist where index [0] has the table name Store , at index [1] there is a table Address and at [2] there is a table Country . Now, the query needs to be fired to database to find out what all column names are there are for Store , Address and Country table.

I assume, the final query should be put in the below manner--

select    
    mylist[0].1stcolumnname,
    mylist[0].2ndcolumnname,
    .....,
    mylist[1].1stcolumnname,
    mylist[1].2ndcolumnname, ....,
    mylist[2].1stcolumnname,
    mylist[2].2ndcolumnname, 
    .... 
from 
    SOMETABLENAME WITH JOINS" 

If these results are fetched correctly, then final output query to be fired would look something like

Select 
    "Store.id", "Store.Name", "Store.gstno", "Store.addressId",  
    "Address.addressId", "Address.addressLine1", "Address.addressLine2", 
    "Address.postcode", "Address.countryId", 
    "Country.countryId", "Country.name"
from 
    SOMETABLENAME WITH JOINS;

As you can see here, each table name with each column name is fetched and the query is created.

Answer 1

use this one:

   using (var db = new EFDemoContext())
            {
                var columnNames = db.Database.SqlQuery<string>(" SELECT T.name + '.' + C.name AS Name
           FROM   sys.objects AS T
           JOIN sys.columns AS C ON T.object_id = C.object_id
           JOIN sys.types AS P ON C.system_type_id = P.system_type_id
           WHERE  T.type_desc = 'USER_TABLE'  and T.name not like  N'%sysdiagrams%';").ToList();
            }