SQL and noSQL

so today i will talk about SQL and noSQL data storege ,but first what is data ?,and what does it mean data storage ?

We call data evry information that we have in the website or our machin and to save it we need to store it in dataBase , wait what data base ? if you are not familier with this term conseder the data base as container that we put information inside it to retriev it later .

Now for the ways of storing data and for that we have two ways :

SQL : imagin if your data is potato and you bookd a box of 5kg for each person that going to put data and evry person will have it own box and that data should not surpass that 5kg so it could be less but not more then that , sounds orgenized right ? well accely it is, but this way of storage have many drowbacks : let’s imagin that we have 100 box in our container (database) and each box is not full with avrage of only 3kg instaid of 5kg that the box can hold we will end up with 200kg of wasted space and that is the biggest disadvanteg if you have a lot of data , because if you have a website you will have to pay even for the unused data and thats a huge .