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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;
}
The participation Constraints shows whether the existence of an entity depends on its being associated to another entity by the relationship type. There are two kinds of participat
Ancestry database records information about family trees . Following information is recorded about each person: FIRSTNAME first name SURNAME surname MNAME maiden name (if
What is 2NF? A relation schema R is in 2NF if it is in 1NF and every non-prime attribute A in R is fully functionally dependent on primary key.
Why older data models are being replaced by new data modelling 100 words accepted#
what is specialization?
#questiontypes of keys examples..
Shared lock or Read Lock It is requested by a transaction that needs to just read the value of data item. A shared lock on a data item does not permit an exclusive lock
In an E-R diagram how attributes are represented ? In an E-R diagram attributes are represented in a ellipse.
What are the two approaches to store relations in distributed database? a) Replication b) Fragmentation
What are the purpose for having variable length records? What kinds of separator characters are required for each? Variable-Length Records - Variable-length records are thos
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