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What are the differences among MySQL_fetch_array(), MySQL_fetch_object(), MySQL_fetch_row()?
Mysql_fetch_object returns the result from the database like objects while mysql_fetch_array returns result as an array.
This will permit access to the data via the field names E.g. using mysql_fetch_object field can be accessed as $result-
>name andusing mysql_fetch_array field can be accessed as $result->[name].
mysql_fetch_row($result):- where $result is the result resource come back from a successful query executed using the mysql_query() function.
Illustration:
$result = mysql_query("SELECT * from students);
while($row = mysql_fetch_row($result))
{
Some statement;
}
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What is system catalog or catalog relation? How is better known as? A RDBMS maintains a explanation of all the data that it contains, information about every relation and index
can you resolve this for me please? Database Management Systems Homework 1 The following relations are given (primary keys are underlined): PLAY-ACTOR(AId, Name, Nationality, Birt
Whenever the LIMIT clause will be used? LIMIT is used for the following kinds of problems: 1) Answering questions about first or last and largest or smallest 2) Splitting
List the string operations supported by SQL? 1) Pattern matching Operation 2) Concatenation 3) Extracting character strings 4) Converting among uppercase and lower cas
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Implementation of association as an object Implement as a separate association object, independent of either class, as in Figure. An association object is a group of pairs
What is the full form of DDL? DDL is stand for Data Definition Language.
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