get from 2 tables which are connected - Printable Version +- CodeIgniter Forums (https://forum.codeigniter.com) +-- Forum: Archived Discussions (https://forum.codeigniter.com/forumdisplay.php?fid=20) +--- Forum: Archived Development & Programming (https://forum.codeigniter.com/forumdisplay.php?fid=23) +--- Thread: get from 2 tables which are connected (/showthread.php?tid=54140) Pages:
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get from 2 tables which are connected - El Forum - 08-24-2012 [eluser]UnknownPlayer[/eluser] Hi, i have article, cats and article_cats table. article table fields: Code: - id cats table table fields: Code: - id article_cats table fields: Code: - id now i wonna select that article with this fields: Code: - id How can i do this with codeigniter query helper and with 1 query ? get from 2 tables which are connected - El Forum - 08-24-2012 [eluser]CroNiX[/eluser] Look into JOINs using mysql to get related data from other tables and you can use GROUP_CONCAT() to grab all of the categories for each article. Once you figure out the regular SQL to do the query you can convert it to active record. get from 2 tables which are connected - El Forum - 08-24-2012 [eluser]UnknownPlayer[/eluser] I tried with JOIN, but no success Can you give me code and i will check ? get from 2 tables which are connected - El Forum - 08-24-2012 [eluser]CroNiX[/eluser] Post what you have tried. get from 2 tables which are connected - El Forum - 08-24-2012 [eluser]UnknownPlayer[/eluser] I removed that code, now my code is doing 3 sql queries. First get article info, then function that get cats for that article and get cat name for each cat, and at end save that object to $data->cats. Can you give me example for join method, so i can do it on that way ? get from 2 tables which are connected - El Forum - 08-24-2012 [eluser]vitoco[/eluser] This is the query, but analize it, and read documentation to learn well. Code: SELECT if you need to add conditions, use WHERE and/or HAVING depending on the field Saludos get from 2 tables which are connected - El Forum - 08-24-2012 [eluser]DarkManX[/eluser] That was a mistake vitoco... CroNiX was doing it right. the topic starter didnt try anything at all i guess, just want to get working code and cronix tried to force him to learn something by himself - you just blew it get from 2 tables which are connected - El Forum - 08-24-2012 [eluser]UnknownPlayer[/eluser] I don't get JOIN at all, tomorrow i will analyze this code, and implement it in mine. I just gave an example what i mean, this is not my tables.. Thank you all. get from 2 tables which are connected - El Forum - 08-25-2012 [eluser]UnknownPlayer[/eluser] Hi, I analyzed this code, and i tried with right and only join method, result is the same, so can someone explain me what is the difference ? get from 2 tables which are connected - El Forum - 08-25-2012 [eluser]UnknownPlayer[/eluser] I have 1 more question, can this field categorie_names be an array with id and name of each categorie ? Is this possible in mysql ? |