1. 연결할 사용자 및 sa 사용

01. SQL Server 외부 연결 설정

https://timeboxstory.tistory.com/10

01. sa 설정

02. User 생성

2. 콘솔에 연결

http://2nusa.blogspot.com/2016/07/c-ms-sql.html

01. Select

using System;
using System.Data.SqlClient;

namespace DBTest
{
    class Program
    {
        static void Main(string[] args)
        {
            // SQL 연결 정보(server = 127.0.0.1, 포트:1433, 아이디 : sa or test, 비밀번호 : sa or test, db : dbName)
            string connectionString  = "server = 127.0.0.1,1433; uid = test; pwd = 1234; database = testdb";

            // 새 연결 정보 생성
            SqlConnection sqlConn = new SqlConnection(connectionString);
            SqlCommand sqlComm = new SqlCommand();
            sqlComm.Connection = sqlConn;
            // query문
            sqlComm.CommandText = "SELECT * FROM test1";
            sqlConn.Open();
            using (SqlDataReader SqlRs = sqlComm.ExecuteReader())
            {
                Console.WriteLine("ID \t \t | Name");
                while(SqlRs.Read())
                {
                    Console.WriteLine($"{SqlRs[0].ToString()} \t \t | {SqlRs[1].ToString()}");
                }
            }
            sqlConn.Close();
            {

            }
        }
    }
}

02. Insert, update, delete

using System;
using System.Data.SqlClient;

namespace DBTest
{
    class Program
    {
        static void Main(string[] args)
        {
            // SQL 연결 정보(server = 127.0.0.1, 포트:1433, 아이디 : sa or test, 비밀번호 : sa or test, db : dbName)
            string connectionString  = "server = 127.0.0.1,1433; uid = test; pwd = 1234; database = testdb";

            // 새 연결 정보 생성
            SqlConnection sqlConn = new SqlConnection(connectionString);
            SqlCommand sqlComm = new SqlCommand();
            sqlComm.Connection = sqlConn;
            // query문
            sqlComm.CommandText = "insert into test1 values(@param1, @param2)";
            // sqlComm.CommandText = "update test1 set name=@param2 where id=@param1";
            // sqlComm.CommandText = "delete test1 where id=@param1";
            sqlComm.Parameters.AddWithValue("@param1", 3);
            sqlComm.Parameters.AddWithValue("@param2", "c");
            sqlConn.Open();
            sqlComm.ExecuteNonQuery();
            sqlConn.Close();
            {

            }
        }
    }
}