从另一个mysql表中选择

Question

I would ask for any help, because Im desperate :D. I need help with my school project, where I have to save data from form. There´s one select, where should be dropdown with datas from another connected table.

here is screenshot of my relations:

 <?php $con = mysql_connect("localhost","root",""); $db = mysql_select_db("cznovis",$con); $get=mysql_query("SELECT id FROM listky); $option = ''; while($row = mysql_fetch_assoc($get)) { $option .= '<option value = "'.$row['id'].'">'.$row['id'].'</option>'; } ?> <form action="odeslat.php" method="POST"> <select name="typ"> <?php echo $option; ?> </select> <input type="submit" name="odeslat" value="ODESLAT"> </form> 

i would appreciate any help

Answer 1

Simple usein join should be enough. Your query shoul by like this:

select * from clenstvi as cl join listky as li on cl.typ=listky.id;

Answer 2

you can use left outer join in your query

select * from table1 left outer join table2 on table1.id = table2.id;

and then concatenate those two columns in your select

$row['data1'].$row['data2'];