SQL Server - Permission on a per table basis? -

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i have .net have read access sql server database. possible sql server give me write access 1 of tables in database, , restrict me read rest of database?

use tsql script, if need:

exec sp_addrolemember n'db_datareader', n'user1';  grant insert, update, select on     mytable  user1 --for multiples, it's   user1,user2

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