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Full Discussion: Optimizing query
Special Forums UNIX and Linux Applications Optimizing query Post 302130200 by matrixmadhan on Friday 3rd of August 2007 01:50:55 PM
Old 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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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)
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