hisoka

"XML is not usually used on the front end of websites" what is the front end of a website? I do not understand these words " front end of a website" . Please can you explain it to me "it's used in other applications to transfer and store data" You mean that XML has a database like SQL ? could you please tell me about the structure of the XML database . Is this how the XML database looks like : <bookstore> <book category="COOKING"> <title lang="en">Everyday Italian</title> <author>Giada De Laurentiis</author> <year>2005</year> <price>30.00</price> </book> <book category="CHILDREN"> <title lang="en">Harry Potter</title> <author>J K. Rowling</author> <year>2005</year> <price>29.99</price> </book> <book category="WEB"> <title lang="en">Learning XML</title> <author>Erik T. Ray</author> <year>2003</year> <price>39.95</price> </book></bookstore> ???

what about the ones of that have XML . How is it possible to see their XML ? // this is first question second question : if there no need to use XML by most websites or If most websites do not have XML so why is XML even created ?

"If you have multiple rows with the same value, you use GROUP BY to only return one result with that value" is it the function of GROUP BY clause ? what if we have multiple rows with different values, do we use GROUP BY to return only one result ??

so an aggregate function is called aggregate as it "operates on a whole lot of rows" or many rows combined together . If I am wrong please correct me "There's nothing saying aggregate value" this sentence says aggregate value A HAVING clause in SQL specifies that an SQL SELECT statement should only return rows where aggregate values meet the specified conditions

I can see html and javascript data of a website in the source code but how can I see the xml of a website?

"If you have multiple rows with the same value" I cannot see in the link you gave me : http://www.w3schools...sql_groupby.asp any table that has two rows with the same value !!!

but why it is called an aggregate function . Why the word aggregate ? You did not answer this question : what is an aggregate value??

yes . It was the first tutorial I read before I posted my message . However I could not understand the group by clause

in this two links : in the first link : http://en.wikipedia.org/wiki/Having_%28SQL%29 A HAVING clause in SQL specifies that an SQL SELECT statement should only return rows where aggregate values meet the specified conditions. It was added to the SQL language because the WHERE keyword could not be used with aggregate functions.[1] what is an aggregate value?? in the second link: http://en.wikipedia.org/wiki/Aggregate_function In database management an aggregate function is a function where the values of multiple rows are grouped together as input on certain criteria to form a single value of more significant meaning or measurement such as a set, a bag or a list. I do not understand what is an aggregate function even after reading in the wikipedia I would like to know what they mean in depth

I read about sql group by clause but I could not understand what it really means and what it does . I would like to know what it is in simple words and what it does ?

You mean that I should ask questions only concerning the subjects that are in this websites like for example Javascript or PHP or SQL or HTML or XML etc.......??

"Are you asking us to do your google searches for you?" "There are a ton of C++ forums out there. If you post questions here then you're waiting for a couple people to see them" it does not matter . You can give me any information that you see useful for my questions concerning c++ I think it is clear

"If you post questions here then you're waiting for a couple people to see them" I will wait until I get a reply "I'm not a C++ expert" it does not matter . You can give me any information that you see useful for my questions concerning c++

thank you for the link but my compiler is dev c++

Now i googled but i have still no idea of the meaning of ... And what it does and its relation with my question

Very good . Now i understand the meaning of the error

I did not understand its syntaxCould you please give me a good and clear example of how it is used?

I was registered in a C++ forum . The forum is special for C++ but to my surprise I saw only newbies and unqualified people and instead of getting right answers I got only senseless answers of people who ignore C++ . Here in w3schools . invisionzone it is totally different There are you and foxymod and both of you are real experts . You know about C++ justsomeguy so may be you can help me

ok thank you I will see and tell you

you mean like this: $ chmod a+r /home/* ?

I read many articles about sleep_for() function in c++ but I still ignore how to use it (with using namespace std;) I need help

"the + operator only is used to add numbers. It can't do anything with strings" int main(){string man = "py";string woman = "thon";cout<<man+woman<<endl;system("pause");} output python it concatenates string so it is not only used for math operations but for string concatenation too what do you think?

"No, any function call will evaluate expressions before passing them to the function" Could you tell me which part in python is responsible for evaluating an expression before passing them to any function? I mean its name . What is its name ?

I can simply use cout<<"green land"<<endl; and that is all . Why am I complicating things !! it gives green land