$sth = $dbh -> prepare ( "SELECT gender, id FROM people" ) $insert -> execute (array( '6', 'male' )) $insert -> execute (array( '5', 'male' )) $insert -> execute (array( '4', 'female' )) $insert -> execute (array( '3', 'female' )) $insert -> execute (array( '2', 'female' )) prepare ( "INSERT INTO people(id, gender) VALUES (?, ?)" ) If grouping column is set explicitly, first columns is returned instead of second. But, if you provide fetch argument, it wouldn't affect returned column, but grouping column. By default, results are grouped by first column (index 0) and second column (index 1) is returned. The following example returns the product_id field correctly:īe careful when using PDO::FETCH_COLUMN with PDO::FETCH_GROUP. The fix is to simply specify your field names in the SELECT clause instead of using the * as a wild card, or, you can also specify the field in addition to the *. The resulting array will look something like this: PLEASE BE AWARE: If you do an OUTER LEFT JOIN and set PDO FetchALL to PDO::FETCH_ASSOC, any primary key you used in the OUTER LEFT JOIN will be set to a blank if there are no records returned in the JOIN. Specified function, using each row's columns as parameters in the call.Īrguments of custom class constructor when the mode PDO::FETCH_FUNC: Returns the results of calling the PDO::FETCH_CLASS: Returns instances of the specifiedĬlass, mapping the columns of each row to named properties in the class. PDO::FETCH_COLUMN: Returns the indicated 0-indexed This argument has a different meaning depending on the value of To return an associative array grouped by the values of a specifiedĬolumn, bitwise-OR PDO::FETCH_COLUMN with To fetch only the unique values of a single column from the result set,
YouĬan specify which column you want with the The result set, specify PDO::FETCH_COLUMN. To return an array consisting of all values of a single column from
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