08-03-2007
Quote:
Originally Posted by
jim mcnamara
rowid is not an indexed column - it is a "pseudocolumn'. the in () subselect will read thru the entire select statement's result set each time. When I get back in a while I'll write something that is faster. You may need to add an index.
Does that mean its executing in this fashion.
rowid <1> - evaluate sub query
rowid <2> - evaluate sub query
.
.
.
rowid <n> - evaluate sub query
Last edited by reborg; 08-03-2007 at 03:29 PM..
Reason: touch post to fix quotes
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LEARN ABOUT PHP
mssql_field_name
MSSQL_FIELD_NAME(3) MSSQL_FIELD_NAME(3)
mssql_field_name - Get the name of a field
SYNOPSIS
string mssql_field_name (resource $result, [int $offset = -1])
DESCRIPTION
Returns the name of field no. $offset in $result.
PARAMETERS
o $result
- The result resource that is being evaluated. This result comes from a call to mssql_query(3).
o $offset
- The field offset, starts at 0. If omitted, the current field is used.
RETURN VALUES
The name of the specified field index on success or FALSE on failure.
EXAMPLES
Example #1
mssql_field_name(3) example
<?php
// Send a select query to MSSQL
$query = mssql_query('SELECT [username], [name], [email] FROM [php].[dbo].[userlist]');
echo 'Result set contains the following field(s):', PHP_EOL;
// Dump all field names in result
for ($i = 0; $i < mssql_num_fields($query); ++$i) {
echo ' - ' . mssql_field_name($query, $i), PHP_EOL;
}
// Free the query result
mssql_free_result($query);
?>
The above example will output something similar to:
Result set contains the following field(s):
- username
- name
- email
SEE ALSO
mssql_field_length(3), mssql_field_type(3).
PHP Documentation Group MSSQL_FIELD_NAME(3)