Okay. So a lot of you might be asking me if I am not going to select star to get a field for some of the rows that are in the table, what is another best practice? And we are going to show you. So here is a demo we are going to quickly explore schemas instead of the big court web UI, flipping back over to Big Query. We have our IRS public dataset here. I am clicking on the organizational details table, and I have got a bunch of columns in here, and I will show you the bad practice first, if I queried the table and I did select star, and you can see how much actually you can to process and by it is by opening up the validator, you get a relatively small table but you are still burning 400 megabytes right here. You can run this query and it will even give you this confirmation, are you sure you want to do this even though you are containing a limit clause, you get billed for all the data because you are scanning things, kind of a scary thing and I said, no I am sure absolutely run the query. And again, it is got to process three seconds and you get kind of the same result but you have a thousand results, right? And you could limit, limit 10 if you wanted to, but again, sometimes it might need to scan through all the data. So, best practice is to actually go back to this schema. And again, you can hold down that command or control key, and click on the table name if you have many in your query. Or if you are quick with your query navigation panel here, you can click on the table name itself. And we went through this schema which is the rows and columns that are available. We went to the details which is the size of the table in that first slide that we did. But the last thing that we might have gone over is clicking on preview. And this is actually it's extremely fast encashed way to look at some of the data that is in the dataset. So here, just like you did with select star, this is just a very, very fast way to just get a feel for some of the data fields that are in your data site without even having to write any sequel whatsoever. So that's one of the most common things that I'll do is immediately jump to say the 2015 table here, immediately preview those results. They'll throw you a cash preview and you can scan to see all the columns you want. So, no need to do select star. All right, let's jump back in.
