Hey there.
Well it's time to start exploring databases.
We will start a database which is used in the Android Esko light database.
What is database and the database can store structured information about some complex objects and some
databases including Esko light store data in the form of a table.
This is a relational database.
Now the students table Each table has rows and columns.
You sure all is a separate record or a separate object that has several attributes such as in this case
group first name last name and gender you and I have already learned how to save data in shared preferences.
This is also a permanent storage of information that does not change when the application is closed.
That just information is stored in a permanent storage.
But when objects are complex with a certain number of attributes it just not very convenient to store
them using key and value pairs.
This is cumbersome and confusing.
Therefore in this case it is better to use a database.
And the advantages of the database are that it is very easy to find the information we need in its sort
objects by some attribute that is we can easily see objects.
For example male or female or how many objects of a certain group we have in the Esko light database.
The main takes is saved as you see certain takes here.
Each attribute is a text that we can see in the database and then read.
Here is another table.
These tables describes costs.
It consists of three columns.
In this case manufacturer of weight call and six Ross another advantage of the database is that you
can very easily increase the number of these rate cuts by adding as many cost to this table in this
case.
They can be one table in the database.
There can be several tables to study the database in Android.
We will create support clawback application.
And in this application will be the rare cuts of club members objects of club members and will contain
information about Name Surname age and the group that this person is involved in.
And databases are used everywhere in our lives from banks to airlines and class care.
Dos that is this is a very important topic so we will analyze in great detail.
See you in the next.
We don't.