DML operation using EntityClient with Entity-Sql

I haven't get proper documentation on EntityClient with EntitySql. Why?

https://msdn.microsoft.com/en-us/library/bb738573.aspx#Anchor_13  after reading from this link, what is the use of entity-sql?

Is it only for reading data, no DML ?

PLease provide documentation or example for performing DML using EntityClient with Entity-Sql

Thanks!