sql表结构存储html选择数据

Question

I want to store a html select data in a table , like an option's value , it's text and some optgroup in between, so that i can recreate select with least processing

currently i have a setup of a two column table ( value<int>,text<varchar> ), i can't figure out how can i insert a blank optgroup?

the html select is like this -

<select name="height" id="height" class="sel_lng" required>
        <option value="">Please select</option>
        <option value="1">v1</option>
        <option value="2">v2</option>
        <option value="3">v3</option>
        <option value="4">v4</option>
        <optgroup label="&nbsp;"></optgroup>
        <option value="5">v5</option>
        <option value="6">v6</option>
</select>

the table would look like

value   text
1       v1
2       v2
3       v3
4       v4 <-- i would like to add an optgroup after this row
5       v5
6       v6

Answer 1

If values need to be sorted by number, you can just add float value 4.5, text NULL. On the front end replace all floating point numbers with optgroup .

Answer 2

Option groups should contain the options they're grouping:

<optgroup>  
    <option>1<option>  
    <option>2<option>  
<optgroup>  

So, I would think you can add a new table with value <int> , value <int > where column 1 is an arbitrary option group id and column 2 is the option id. If you would have items that don't belong to a group, simply don't add them to the option group table.

The new table would look like:
opt_group_id, opt_id
1, 5
1, 6

HTH