MySQL搜索多个表

Question

Hi I have 3 tables: cities , areas , sub_locations, I don't know which one the user is searching so I'd like to search in all the tables at once and also I need to somehow indicate is it area or city or sub_location that returned as a result.

tables stucture:

Cities:
id int
city_name varChar

Areas:
id int
area_name varChar

Sub_locations:
id int
sub_location_name varChar

so only need to search in city_name , area_name and sub_location_name

I'd like to use full text search.Also I use Laravel 4 so you may query in Eloquent. Pls help, never have dealt with that kind of logic before. Thank You.

Answer 1

You can try like

$keyword = $_POST['your_search_input_field'];

$query = "(SELECT city_name FROM Cities WHERE city_name LIKE '%" . 
       $keyword . "%') 
       UNION
       (SELECT area_name FROM Areas WHERE area_name LIKE '%" . 
       $keyword . "%') 
       UNION
       (SELECT sub_location_name FROM Sub_locations WHERE sub_location_name LIKE '%" . 
       $keyword . "%' )";

mysql_query($query);

Answer 2

Use this

SELECT `city_name` as `area` ,'city' as type FROM `cities` where city_name 
'your like conditions'
union 
select `area_name` as `area`, 'area' as type from `areas` where 'your like conditions'
union
select `sub_location_name` as `area`, 'sublocation' as type where 'your like conditions'
from `Sub_locations` 

Here you will find results and also sort from which table these results coming from by type column .