如何选择值等于的列？

Question

I am trying to select the column where the value from a text input equals, i am being returned a value from the input and can echo it. But i cannot do a search and echo what column the value is in. i need to be able to echo the column name the value is in, and multiple if it is in more than one. Any help is appreciated.

 $skw = $_POST['k'];
    if(isset($_POST['k'])){
    $connect = mysql_connect('*', '*', '*')or die('Could not execute command. Please contact a administrator.');
    mysql_select_db('*')or die('No database');
    $query = "SELECT * FROM *TABLE*
    WHERE A1 LIKE '%$skw%' 
    OR B1 LIKE '%$skw%' 
    OR C1 LIKE '%$skw%' 
    OR D1 LIKE '%$skw%' 
    OR E1 LIKE '%$skw%' 
    OR F1 LIKE '%$skw%' 
    OR G1 LIKE '%$skw%' 
    OR H1 LIKE '%$skw%' 
    OR I1 LIKE '%$skw%' 
    OR J1 LIKE '%$skw%'
    OR A2 LIKE '%$skw%' 
    OR B2 LIKE '%$skw%' 
    OR C2 LIKE '%$skw%' 
    OR D2 LIKE '%$skw%' 
    OR E2 LIKE '%$skw%' 
    OR F2 LIKE '%$skw%' 
    OR G2 LIKE '%$skw%' 
    OR H2 LIKE '%$skw%' 
    OR I2 LIKE '%$skw%' 
    OR J2 LIKE '%$skw%'
    OR A3 LIKE '%$skw%' 
    OR B3 LIKE '%$skw%' 
    OR C3 LIKE '%$skw%' 
    OR D3 LIKE '%$skw%' 
    OR E3 LIKE '%$skw%' 
    OR F3 LIKE '%$skw%' 
    OR G3 LIKE '%$skw%' 
    OR H3 LIKE '%$skw%' 
    OR I3 LIKE '%$skw%' 
    OR J3 LIKE '%$skw%'
    OR A4 LIKE '%$skw%' 
    OR B4 LIKE '%$skw%' 
    OR C4 LIKE '%$skw%' 
    OR D4 LIKE '%$skw%' 
    OR E4 LIKE '%$skw%' 
    OR F4 LIKE '%$skw%' 
    OR G4 LIKE '%$skw%' 
    OR H4 LIKE '%$skw%' 
    OR I4 LIKE '%$skw%' 
    OR J4 LIKE '%$skw%'
    OR A5 LIKE '%$skw%' 
    OR B5 LIKE '%$skw%' 
    OR C5 LIKE '%$skw%' 
    OR D5 LIKE '%$skw%' 
    OR E5 LIKE '%$skw%' 
    OR F5 LIKE '%$skw%' 
    OR G5 LIKE '%$skw%' 
    OR H5 LIKE '%$skw%' 
    OR I5 LIKE '%$skw%' 
    OR J5 LIKE '%$skw%'
    OR A6 LIKE '%$skw%' 
    OR B6 LIKE '%$skw%' 
    OR C6 LIKE '%$skw%' 
    OR D6 LIKE '%$skw%' 
    OR E6 LIKE '%$skw%' 
    OR F6 LIKE '%$skw%' 
    OR G6 LIKE '%$skw%' 
    OR H6 LIKE '%$skw%' 
    OR I6 LIKE '%$skw%' 
    OR J6 LIKE '%$skw%'";
    $result = mysql_query($query)or die(mysql_error());
        while($data = mysql_fetch_row($result)){
     echo("<tr><td>$data[0]</td><td>$data[1]</td></tr>");
    }}

Answer 1

Consider normalizing your database so that all those fields A1 ... J6 are individual rows:

mytable_fields:
* field_ref (foreign key to mytable)
* field_nr
* field_value

Your query would then become:

SELECT field_nr, mytable.*
FROM mytable
INNER JOIN mytable_fields ON mytable.field_ref = mytable.id
WHERE field_value LIKE '%$skw%';

This is the only practical way you can tell which field contained the value you are searching for.

Answer 2

You should use show columns to get the column names, check the syntax below.

SHOW [FULL] COLUMNS {FROM | IN} tbl_name [{FROM | IN} db_name] [LIKE 'pattern' | WHERE expr]

Answer 3

Use a UNION , where each sub-query matches a single column, and outputs an additional column that says which column it's matching.

SELECT 'A1' AS Col, *
FROM Table
WHERE A1 LIKE '%$skw%'
UNION
SELECT 'B1' AS Col, *
FROM Table
WHERE B1 LIKE '%$skw%'
UNION
SELECT 'C1' AS Col, *
FROM Table
WHERE C1 LIKE '%$skw%'
...

If a row matches in multiple columns, it will turn into multiple rows in this result.