Difference between revisions of "PHP-and-MySQL/C3/MySQL-Part-5/English-timed"

!Time

!Narration

|Welcome to mySQL part 5. To echo our data to the user and to display the results from this, we'll need to use "while" statement.

|0:12

|As I mentioned, we have created a row variable and this is "=mysql_fetch_assoc".

|This is creating an associative array from our "extract" query which is here.

|So we are selecting everything in the "people" table and ordering them by "id" in ascending order.

|Inside our WHILE since we wrote row as an array and its an associative array, row[0] will be wrong because these are numeric.

|These are numeric id tags and instead of this we'll use our fieldnames, since this is associative.

|So, instead of 0 1 2 3 4, we'll be using the actual name.

|Lets create variables from this. Let me say id and then firstname equals, we are using the same structure throughout.

|So its quite easy to copy and paste this.

|Lets indent this.

|So that's five and then lets just change. This is a lazy act!

|But its just a lot quicker to do this way.

|So lastname and we have the date of birth. We also have the gender.

|We need to use the "echo" command.

|There might be a loop inside the middle, at the moment. So anything we echo out will be repeated.

|Every record we have and that's right, too. We'll repeat this code.

|For example, I say text here. There are currently 4 records.

|After refreshing this page, you should see text echoed out 4 times.

|By typing out 4 times, this piece of code here represents every loop.

|Therefore we can incorporate for example, id or firstname or any other, that we have extracted from the database using our associative array.

|Now I'll write firstname lastname was born on dob for date of birth and is and I'll put gender up there.

|0 2:49

|Not forgetting our linebreak. I'll refresh our page.  

|Okay, we have just given out the content of our table using this star, declared by this asterisk, where it collects every single data or every record.

|Now let me do this. I'll say IF gender==F then gender=female.

|The actual spelling of that and then let us say else gender=male. This is just rewriting the variable depending on the value.

|If we refresh now, we can see this has changed to '''male male''' and '''female female'''. We also have some interesting ways of displaying this data.

|At the moment I'm selecting from the people table and ordering by id and ascending order.

|I can also order by descending id. You can see that this switches this data around.  

|We can also order it by firstname. This will put this in descending alphabetical order and ascending will put this in ascending alphabetical order.

|So we got ''' A D E and K'''.

|You could do the same with anything. Even Date of birth, as long as you include this over here.  

|Another thing to do is, let me just take this back to id and have this as descending. We can use this limit 1 or we can say limit 2, 3 or 4.

|Now I'll limit 1 for the purpose of this.

|Now lets have 1 to let the user of the page know the last person that was inserted into this table.

|So I say "echo" here.

|echo last person to be inserted into table was and I'll leave it like that and add a linebreak.  

|I'll just echo out the first and last name. Ok?

|Last person to be inserted. Yes, in fact it does work!

|It is already typed in the "limit" command.

|What I've done is by limiting this by 1 in descending order of id - the id is incremental - I get 4 at the top and if we are limiting it by 1, 4 will be the only record that is selected.  

|This "while" will only return 1 data value.

|This is one command here, so lets" * from people", "order by id decs" is another and "limit 1" is yet another.  

|We don't use commas or anything. This is just how we write our code inside our query.

|Okay, just to test this , I'll insert just using the "insert" function in php myadmin and I'll insert another record.

|For example, lets type in "David Green" and our date of birth could be random.

|It doesn't really matter what we type in here. We say male.  

|Click on browse and we have a new value here.  

|When we come back here and refresh, that will change to "David Green".

|So this is really useful if you have a website in which your putting videos or personal pictures.  

|Basically how to echo out data and how to manipulate it by just using mysql query.

|We will create some html forms and to enable them to do this.

|This will let them select a name from the database or table of their choice.

|So, join me in the next part.

|Bye for now.  This is Juanita Jayakar dubbing for the Spoken Tutorial Project