update

Former-commit-id: 7a7a36ef69139b0e335d276903a6ee87cfe5ec0d
Former-commit-id: b252302cec00f1d2baae4b6db8fdfee7e46694c5

labs/kafka/KafkaEFTest/Program.cs

@@ -158,6 +158,8 @@ namespace KafkaEFTest
                     using (var cmd = conn.CreateCommand())
                     {
                         cmd.CommandTimeout = 60;
+                        //不需要update，只需要插入，主键相同的自动合并
+                        //可以delete，不建议delete，建议更新标志位
                         cmd.CommandText = $"insert into test (`id`,`value`,`number`) values ('{entity.Id}','{entity.Value}',{entity.Number})";
                         cmd.ExecuteNonQuery();
                     }