text stringlengths 1 81 | start float64 0 10.1k | duration float64 0 24.9 |
|---|---|---|
So let me hit Enter here. | 3,278.84 | 1.85 |
And I'll get back, well,
not quite the top 10. | 3,280.69 | 5.36 |
I see rating of 3.05 here
and rating of 3.42 down here. | 3,286.05 | 6.19 |
So based on this, what do you think
the default ordering of ORDER BY is? | 3,292.24 | 7.76 |
So you might be from least to greatest. | 3,300 | 2.02 |
So we saw here that we have
rating being pretty small, | 3,302.02 | 3.41 |
but we said ORDER BY our rating. | 3,305.43 | 1.71 |
So it starts from small
and goes down to large. | 3,307.14 | 3.3 |
So we need to fix this in some way. | 3,310.44 | 1.98 |
And let's introduce a
new addition to ORDER BY | 3,312.42 | 2.82 |
to have us fix this query overall. | 3,315.24 | 3.58 |
So let me show you that ORDER BY does
by default sort from least to greatest. | 3,318.82 | 6.11 |
But let's try some addition here. | 3,324.93 | 2.64 |
We have not just ORDER BY
but ORDER BY some column | 3,327.57 | 4.26 |
and then ascending or descending. | 3,331.83 | 3.7 |
So ascending is the default. It
means from least to greatest. | 3,335.53 | 3.95 |
Descending, we can specify
meaning from greatest to smallest. | 3,339.48 | 4.78 |
So let's try using ORDER BY
but now with this other keyword | 3,344.26 | 3.05 |
called DESC for descending here. | 3,347.31 | 3.21 |
I'll go back to my terminal. | 3,350.52 | 3.24 |
And let's rewrite this
query to include DESC. | 3,353.76 | 3.45 |
I'll say SELECT "title" and
"rating" from "longlist." | 3,357.21 | 5.49 |
And let me-- before
I run this query, let | 3,362.7 | 1.932 |
me just clear my terminal
so it's back up at the top. | 3,364.632 | 2.208 |
I'll backspace this. | 3,366.84 | 1.74 |
And then a moment here, I'll press
Control-L. Now I'm back at the top. | 3,368.58 | 4.47 |
I'll say SELECT "title", SELECT "title"
and "rating" from "longlist" WHERE-- | 3,373.05 | 8.797 |
actually, not WHERE. | 3,381.847 | 0.833 |
We're not filtering yet. | 3,382.68 | 1.14 |
I'll say ORDER BY rating but
not by ascending by default-- | 3,383.82 | 6.262 |
going from least to greatest. | 3,390.082 | 1.208 |
I want greatest to least. | 3,391.29 | 1.72 |
So I'll say DESC here. | 3,393.01 | 2.36 |
Now, I can say LIMIT 10 Semicolon. | 3,395.37 | 3.51 |
Hit Enter. | 3,398.88 | 0.96 |
And now I'll see the top 10 books. | 3,399.84 | 2.7 |
Here, I have The Eighth Life coming
in at 4.52 and The Books of Jacob | 3,402.54 | 4.62 |
coming in at 4.06. | 3,407.16 | 2.52 |
So now we're going from
greatest to smallest. | 3,409.68 | 3.78 |
Well, I could order by
not just these ratings, | 3,413.46 | 3.42 |
but also by the number of votes. | 3,416.88 | 2.34 |
It seems there's a tie to break here. | 3,419.22 | 1.68 |
If I look at Still Born and When
We Cease to Understand the World, | 3,420.9 | 3.99 |
those both have a rating of 4.14. | 3,424.89 | 2.91 |
But presumably, one book has
maybe more votes than the other. | 3,427.8 | 4.63 |
So I could try to break this tie by
ordering not just by rating but also | 3,432.43 | 5.93 |
by votes, the number votes this book
actually received on Good Reads. | 3,438.36 | 4.17 |
So let's try that then
to break this tie. | 3,442.53 | 2.76 |
I'll come back over here. | 3,445.29 | 1.44 |
And I'll try this query now. | 3,446.73 | 2.76 |
I'll say, again, SELECT "title"
and "rating" from "longlist." | 3,449.49 | 6.3 |
Now I'll order by, first, the
rating column in descending order. | 3,455.79 | 6.07 |
But I also want to order by the number
of votes after I order by rating. | 3,461.86 | 5.24 |
So I'm saying first order
by rating, but afterwards, | 3,467.1 | 3.63 |
followed by a comma, let's
order by the number of votes | 3,470.73 | 3.48 |
also in descending order--
from greatest to smallest. | 3,474.21 | 4.29 |
Now I'll just continue my
query on the next line. | 3,478.5 | 2.67 |
And I'll say LIMIT 10 Semicolon. | 3,481.17 | 2.91 |
This then gives me, let's
see, the books but now | 3,484.08 | 5.04 |
they're going to be in the order that
allows us to see the number of votes. | 3,489.12 | 3.85 |
Let me just actually refine this. | 3,492.97 | 1.41 |
Let me say not just title
and rating, let's make | 3,494.38 | 2.732 |
sure we can see the votes here too. | 3,497.112 | 1.458 |
So SELECT "title" and "rating"
and "votes" from "longlist." | 3,498.57 | 5.01 |
Hit Enter on my query. | 3,503.58 | 1.23 |
Now I'll say ORDER BY
"rating" and "votes." | 3,504.81 | 2.94 |
Then I'll say LIMIT 10. | 3,507.75 | 1.8 |
And here, I'm just getting
the Up Arrow on my computer. | 3,509.55 | 2.61 |
I'll hit Enter. | 3,512.16 | 1.5 |
And now I'll see the votes included. | 3,513.66 | 2.49 |
So let me show you
this on the big screen. | 3,516.15 | 1.92 |
Here, we see that the tie is broken. | 3,518.07 | 2.37 |
So when we cease to
understand the world, | 3,520.44 | 2.16 |
these both have 4.14
along with Still Born. | 3,522.6 | 3.96 |
But here, this book has more votes
and so is higher in our order | 3,526.56 | 4.98 |
now that we've ordered
by multiple columns. | 3,531.54 | 4.37 |
So let me pause here
and ask what questions | 3,535.91 | 2.33 |
we have on ordering with data. | 3,538.24 | 3.39 |
Ordering by one column or multiple,
and how we can sort data like this. | 3,541.63 | 5.85 |
SPEAKER: Sir, I want to know that
can we write rating to 4.93 to 4.9? | 3,547.48 | 6.875 |
CARTER ZENKE: Yeah good question. | 3,554.355 | 1.375 |
I think if I understand you
correctly, how can we select a rating | 3,555.73 | 2.85 |
or try to find a rating that's like
equal to 4.92 or things like that. | 3,558.58 | 4.24 |
Let's try that here. | 3,562.82 | 0.96 |
So if I want to find
a particular rating, | 3,563.78 | 2.57 |
I could simply use my
WHERE friend from before. | 3,566.35 | 3.9 |
I could say SELECT, let's
say, "title" and "rating." | 3,570.25 | 4.14 |
And maybe I could try to find
a particular rating for a book | 3,574.39 | 3.36 |
from longlist. | 3,577.75 | 1.65 |
I could say then WHERE this rating is
equal to, let's say, 4.932 Semicolon. | 3,579.4 | 7.47 |
If this book exists, it
will get it back here. | 3,586.87 | 2.29 |
So I'll hit Enter. | 3,589.16 | 1.01 |
And I see there's no book with
this particular rating, 4.392. | 3,590.17 | 5.64 |
But good question for how to find
particular ratings for our books here. | 3,595.81 | 5.7 |
OK. | 3,601.51 | 0.87 |
Other questions too on how we've been
able to sort our data and use ORDER BY? | 3,602.38 | 6.75 |
SPEAKER: Will descend work on a
string on an alphabetic basis? | 3,609.13 | 3.87 |
Or do we need to have special
conditions for alphabetic characters? | 3,613 | 5.098 |
CARTER ZENKE: Yeah, a great question. | 3,618.098 | 1.542 |
So how could we use ORDER BY with some
characters or strings or some text | 3,619.64 | 4.1 |
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