What about altcoin? I mean, if I know the transaction ID and other stuff, can I mine only that transaction?
you don't mine transaction, you include them in the block you find, but you need a considerable hashpower to do that, with altcoin that have a small hash is surely more feasible to do it in solo
i see that your nick is centurion, a presume you want to do this on the altcoin called centurion x11, you can try to do it with a baikal x11 asic which has enough hash to take on the chain
In theory yes, but it relies on you being able to mine a block which the transaction could contain so that it can be confirmed.
A specific transaction can only really be mined by a miner who includes the transaction in a block that they mine. So you would need an amount of hash power which allows you to mine loads of blocks, which you won't be getting any time soon (and if you set a fee too low, miners will have no economic reason to include your transaction so it won't happen).
You're probably thinking of downloading some miner on your computer and just mining your transaction specifically, but that's kind of impossible.
There are services that try to include your transaction, like
ViaBTC's transaction accelerator, but they're always limited and, if they're free, always have an agenda. You'd be best off just paying a good fee.
Thank you for the perfect reply
These was the reply that i was hoping. All is more clear, so a block is capable of lot of transaction. When i made a transaction it going to be "batched" in the next generate block and when he will hased by the miner, and reach the level of necessary share, it be confirmed.
The only method to fast confirm the transaction is have lot of power for mine the block.
Thank you for the reply man
Hi think that is a very stupid questions, however: Is possible to mine a specific transaction for fast confirmation in the chain? 
