pre-view/CS50-raw · Datasets at Hugging Face

text stringlengths 1 81	start float64 0 10.1k	duration float64 0 24.9
for each of these rows.	1,692.02	1.68
And more often than not, you'll likely have	1,693.7	2.25
a database or CSV that looks a bit more like this without the primary key.	1,695.95	4.92
But you'll still want to have a primary key when you import into your database.	1,700.87	4.84
So let's try working with this kind of CSV now	1,705.71	3.29
and having SQLite generate some of the primary keys for us.	1,709	3.87
Come back to my computer.	1,712.87	1.86
And let's update our mfa.csv just to remove those primary key column here.	1,714.73	5.71
So I will open up again mfa.csv.	1,720.44	4.46
And let me try to just delete this column all together.	1,724.9	2.7
I'll move [? id, ?] remove 1, and 2, and 3, and 4, and 5.	1,727.6	7.08
Let me save it, and now that id column is gone.	1,734.68	4.57
But now there's a problem.	1,739.25	1.77
Like if I go to my schema, and I type .schema,	1,741.02	4.53
notice how there are four columns in this table--	1,745.55	3.75
"id," "title," "accession_number," and "acquired."	1,749.3	4.05
Well, now my CSV only has three columns.	1,753.35	3.64
So if I try to import this CSV into this table,	1,756.99	3.53
I'm going to run into trouble, because I have different numbers of columns	1,760.52	3.21
[? between ?] my CSV and my table.	1,763.73	3.025
Well, what can I do instead?	1,766.755	2.375
It turns out that I could actually import this data	1,769.13	3.78
into a temporary table, and then take that data	1,772.91	3.57
and insert that data in that temporary table into my real one	1,776.48	3.57
called "collections" here.	1,780.05	1.62
I can use both .import and INSERT INTO to accomplish that task for me.	1,781.67	6
So let's try this.	1,787.67	1.14
I'll say .import.	1,788.81	1.95
I want to import a CSV now-- [? dash ?] [? dash ?] [? CSV. ?] Which one?	1,790.76	4.23
Well, mfa.csv in this case.	1,794.99	3.09
Now, though, I want to create a brand new table that doesn't yet exist.	1,798.08	3.822
So I'll type the name of the table.	1,801.902	1.458
And I just call it temp for now to temporarily import	1,803.36	3.54
this data into a brand new table.	1,806.9	2.49
And notice how here I'm not using [? dash ?] [? dash ?]	1,809.39	2.87
skip 1, because now I want to take advantage of those header rows.	1,812.26	4.09
SQLite, if I import into a new table, will notice I have a header row	1,816.35	6.46
and make my columns the very same names that are in my header row--	1,822.81	4.79
title, accession number, and acquired.	1,827.6	2.61
I don't want to skip them.	1,830.21	1.17
I want SQLite to see them and create this table using those header rows.	1,831.38	5.23
So now, I'll hit Enter, and nothing seems to happen.	1,836.61	3.38
But if I type .schema, what do I see, but a brand new table called "temp"	1,839.99	5.01
that SQLite has just made automatically and notice how it used that header row.	1,845	4.05
I have "title," "accession_number," and "acquired" as my column names.	1,849.05	5.745
OK, let's now look inside the temp table,	1,854.795	2.585
I'll say SELECT [? star ?] FROM "temp" semicolon.	1,857.38	5.14
And now, I see all that data in there.	1,862.52	1.83
But I don't have primary keys yet.	1,864.35	1.85
So my goal [? is ?] [? really ?] to take all this data and insert it	1,866.2	3.87
into my collections table to give it that primary key I've been wanting	1,870.07	4.56
here.	1,874.63	0.72
Again, if I type SELECT [? star ?] FROM "collections," well, nothing-- oh,	1,875.35	5.648
something is still there.	1,880.998	1.042
Let me actually just delete this [INAUDIBLE]	1,882.04	2.177
I'll say DELETE FROM "collections" to remove it all together-- we'll	1,884.217	2.833
[? get ?] [INAUDIBLE] just a minute.	1,887.05	1.5
And now let me try, SELECT [? star ?] FROM "collections,"	1,888.55	4.47
and I should see nothing inside of collections.	1,893.02	3.73
So what could I do?	1,896.75	1.29
I could [? INSERT ?] [? INTO ?] [? collections ?] using the data from	1,898.04	3.59
my temp table.	1,901.63	1.5
So I'll try that.	1,903.13	0.85
I'll say INSERT INTO "collections" and choose those columns yet again.	1,903.98	5.48
I'll say the "title," and the "accession_number,"	1,909.46	4.99
and now let's go for the "acquired" column as well.	1,914.45	4.45
I'll hit Enter.	1,918.9	1.47
But instead of typing many new lines of values,	1,920.37	3.96
I actually have a way to dynamically select all the values I want to insert,	1,924.33	5.91
and it looks a bit like this.	1,930.24	1.93
I could say INSERT INTO [? some ?] table and some columns of that table.	1,932.17	6.72
But I want to insert the results of this SELECT down below.	1,938.89	4.44
So I'll [? SELECT ?] some columns [? FROM ?] some separate table.	1,943.33	3.39
And so long as these columns align, I'll be able to actually take the results	1,946.72	5.13
of that [? SELECT ?] and [? insert ?] all of them [? into ?] this new table	1,951.85	3.33
using INSERT INTO.	1,955.18	1.89
So let me finish my statement here, we can see the results.	1,957.07	2.85
Come back to my computer.	1,959.92	2.13
And here, I'll type a SELECT to get back all the items from my temp table.	1,962.05	5.64
I'll say SELECT-- in this case, SELECT, let's	1,967.69	4.38
go for the "title" column, the "accession_number"	1,972.07	4.38
column, and the "acquired" column from my "temp" table.	1,976.45	4.65
Now, if I hit semicolon, I should see--	1,981.1	4.17
well, nothing at first.	1,985.27	1.2
But if I type SELECT [? star ?] FROM "collections,"	1,986.47	4.53
I see all my data now in there selected from my temporary table.	1,991	5.61
And now if I type .schema, I still see temp.	1,996.61	3.013
But what can I do now?	1,999.623	0.917
I could just delete that table altogether.	2,000.54	2.17
I could say DROP TABLE "temp," as we saw last week, semicolon, hit Enter,	2,002.71	5.66
.schema again.	2,008.37	1.72
And now, we're back where we want to be with a single table,	2,010.09	3.59
and now we've import our data from our CSV with primary keys.	2,013.68	5.35
If I type "collections" here, we see it all in this table.	2,019.03	5.62
OK, so we've seen several versions of import, one	2,024.65	3.54
to import into an existing table and one to import into a brand new table.	2,028.19	4.27
Let me ask then what questions we have on how to use .import or how to insert	2,032.46	6.08
more data into our database.	2,038.54	4.7
Let's go [? Louise. ?]	2,043.24	1.19
SPEAKER 6: Can we ask the INSERT INTO command to place	2,044.43	3.9

for each of these rows.

1,692.02

1.68

And more often than not, you'll likely have

1,693.7

2.25

a database or CSV that looks a bit more like this without the primary key.

1,695.95

4.92

But you'll still want to have a primary key when you import into your database.

1,700.87

4.84

So let's try working with this kind of CSV now

1,705.71

3.29

and having SQLite generate some of the primary keys for us.

1,709

3.87

Come back to my computer.

1,712.87

1.86

And let's update our mfa.csv just to remove those primary key column here.

1,714.73

5.71

So I will open up again mfa.csv.

1,720.44

4.46

And let me try to just delete this column all together.

1,724.9

2.7

I'll move [? id, ?] remove 1, and 2, and 3, and 4, and 5.

1,727.6

7.08

Let me save it, and now that id column is gone.

1,734.68

4.57

But now there's a problem.

1,739.25

1.77

Like if I go to my schema, and I type .schema,

1,741.02

4.53

notice how there are four columns in this table--

1,745.55

3.75

"id," "title," "accession_number," and "acquired."

1,749.3

4.05

Well, now my CSV only has three columns.

1,753.35

3.64

So if I try to import this CSV into this table,

1,756.99

3.53

I'm going to run into trouble, because I have different numbers of columns

1,760.52

3.21

[? between ?] my CSV and my table.

1,763.73

3.025

Well, what can I do instead?

1,766.755

2.375

It turns out that I could actually import this data

1,769.13

3.78

into a temporary table, and then take that data

1,772.91

3.57

and insert that data in that temporary table into my real one

1,776.48

3.57

called "collections" here.

1,780.05

1.62

I can use both .import and INSERT INTO to accomplish that task for me.

1,781.67

6

So let's try this.

1,787.67

1.14

I'll say .import.

1,788.81

1.95

I want to import a CSV now-- [? dash ?] [? dash ?] [? CSV. ?] Which one?

1,790.76

4.23

Well, mfa.csv in this case.

1,794.99

3.09

Now, though, I want to create a brand new table that doesn't yet exist.

1,798.08

3.822

So I'll type the name of the table.

1,801.902

1.458

And I just call it temp for now to temporarily import

1,803.36

3.54

this data into a brand new table.

1,806.9

2.49

And notice how here I'm not using [? dash ?] [? dash ?]

1,809.39

2.87

skip 1, because now I want to take advantage of those header rows.

1,812.26

4.09

SQLite, if I import into a new table, will notice I have a header row

1,816.35

6.46

and make my columns the very same names that are in my header row--

1,822.81

4.79

title, accession number, and acquired.

1,827.6

2.61

I don't want to skip them.

1,830.21

1.17

I want SQLite to see them and create this table using those header rows.

1,831.38

5.23

So now, I'll hit Enter, and nothing seems to happen.

1,836.61

3.38

But if I type .schema, what do I see, but a brand new table called "temp"

1,839.99

5.01

that SQLite has just made automatically and notice how it used that header row.

1,845

4.05

I have "title," "accession_number," and "acquired" as my column names.

1,849.05

5.745

OK, let's now look inside the temp table,

1,854.795

2.585

I'll say SELECT [? star ?] FROM "temp" semicolon.

1,857.38

5.14

And now, I see all that data in there.

1,862.52

1.83

But I don't have primary keys yet.

1,864.35

1.85

So my goal [? is ?] [? really ?] to take all this data and insert it

1,866.2

3.87

into my collections table to give it that primary key I've been wanting

1,870.07

4.56

here.

1,874.63

0.72

Again, if I type SELECT [? star ?] FROM "collections," well, nothing-- oh,

1,875.35

5.648

something is still there.

1,880.998

1.042

Let me actually just delete this [INAUDIBLE]

1,882.04

2.177

I'll say DELETE FROM "collections" to remove it all together-- we'll

1,884.217

2.833

[? get ?] [INAUDIBLE] just a minute.

1,887.05

1.5

And now let me try, SELECT [? star ?] FROM "collections,"

1,888.55

4.47

and I should see nothing inside of collections.

1,893.02

3.73

So what could I do?

1,896.75

1.29

I could [? INSERT ?] [? INTO ?] [? collections ?] using the data from

1,898.04

3.59

my temp table.

1,901.63

1.5

So I'll try that.

1,903.13

0.85

I'll say INSERT INTO "collections" and choose those columns yet again.

1,903.98

5.48

I'll say the "title," and the "accession_number,"

1,909.46

4.99

and now let's go for the "acquired" column as well.

1,914.45

4.45

I'll hit Enter.

1,918.9

1.47

But instead of typing many new lines of values,

1,920.37

3.96

I actually have a way to dynamically select all the values I want to insert,

1,924.33

5.91

and it looks a bit like this.

1,930.24

1.93

I could say INSERT INTO [? some ?] table and some columns of that table.

1,932.17

6.72

But I want to insert the results of this SELECT down below.

1,938.89

4.44

So I'll [? SELECT ?] some columns [? FROM ?] some separate table.

1,943.33

3.39

And so long as these columns align, I'll be able to actually take the results

1,946.72

5.13

of that [? SELECT ?] and [? insert ?] all of them [? into ?] this new table

1,951.85

3.33

using INSERT INTO.

1,955.18

1.89

So let me finish my statement here, we can see the results.

1,957.07

2.85

Come back to my computer.

1,959.92

2.13

And here, I'll type a SELECT to get back all the items from my temp table.

1,962.05

5.64

I'll say SELECT-- in this case, SELECT, let's

1,967.69

4.38

go for the "title" column, the "accession_number"

1,972.07

4.38

column, and the "acquired" column from my "temp" table.

1,976.45

4.65

Now, if I hit semicolon, I should see--

1,981.1

4.17

well, nothing at first.

1,985.27

1.2

But if I type SELECT [? star ?] FROM "collections,"

1,986.47

4.53

I see all my data now in there selected from my temporary table.

1,991

5.61

And now if I type .schema, I still see temp.

1,996.61

3.013

But what can I do now?

1,999.623

0.917

I could just delete that table altogether.

2,000.54

2.17

I could say DROP TABLE "temp," as we saw last week, semicolon, hit Enter,

2,002.71

5.66

.schema again.

2,008.37

1.72

And now, we're back where we want to be with a single table,

2,010.09

3.59

and now we've import our data from our CSV with primary keys.

2,013.68

5.35

If I type "collections" here, we see it all in this table.

2,019.03

5.62

OK, so we've seen several versions of import, one

2,024.65

3.54

to import into an existing table and one to import into a brand new table.

2,028.19

4.27

Let me ask then what questions we have on how to use .import or how to insert

2,032.46

6.08

more data into our database.

2,038.54

4.7

Let's go [? Louise. ?]

2,043.24

1.19

SPEAKER 6: Can we ask the INSERT INTO command to place

2,044.43

3.9