使用多个表的优化方式查询结果

Question

I am trying to get data using 4 tables. List of Tables

• numbers
• calls
• ref_label_no
• labels

I want to fetch data no of calls's Number attached with specific labels. Here is table.
Number Table :

select id,uuid,number from numbers limit 1;
+----+--------------------------------------+------------+
| id | uuid                                 | number     |
+----+--------------------------------------+------------+
|  1 | ed268b05-758e-44fd-b429-8d5223651814 | 1234561222 |
+----+--------------------------------------+------------+

Call Table

mysql> select id,uuid,did from calls limit 2;
+----+-------------------------------------+------------+
| id | uuid                                | number     |
+----+-------------------------------------+------------+
|  1 | ddddass-b810-4f23-7456-8ff56efab080 | 1234561222 |
|  2 | dddddd-b810-4f23-7456-8ff56efab080  | 123456789  |
+----+-------------------------------------+------------+
2 rows in set (0.02 sec)

ref_label_no Table

mysql> select uuid,number_uuid,label_uuid from ref_label_no limit 1;
+--------------------------------------+--------------------------------------+--------------------------------------+
| uuid                                 | number_uuid                          | label_uuid                           |
+--------------------------------------+--------------------------------------+--------------------------------------+
| 7a5e1b6e-0194-4993-8d78-5f7a1b60c7d2 | ed268b05-758e-44fd-b429-8d5223651814 | 7262b06e-9263-4825-8411-4c107104a60b |
+--------------------------------------+--------------------------------------+--------------------------------------+
1 row in set (0.00 sec)

labels table

mysql> select uuid,name from labels limit 1;
+--------------------------------------+-------+
| uuid                                 | name  |
+--------------------------------------+-------+
| 7262b06e-9263-4825-8411-4c107104a60b | INDIA |
+--------------------------------------+-------+
1 row in set (0.00 sec)

Now I want result like Calls number with total calls.[This Output i needed]

mysql> select uuid,name from labels limit 1;
+--------------------------------------+-------+
| Number                       | Total_calls  |
+--------------------------------------+-------+
| 13456789                     |       2      |
+--------------------------------------+-------+
1 row in set (0.00 sec)

I have made below query but no success also taking too much time to response.

select count(*) as Total_calls,calls.number as did,labels.name,calls.created_at as callstart from calls, labels JOIN ref_label_no ON labels.uuid = ref_label_no.label_uuid JOIN numbers ON numbers.uuid = ref_label_no.number_uuid where labels.name="INDIA"  group by calls.number;

Any Suggestion Or recommendation ?

Answer 1

Multiple tables Avoid using join, use Union. It will be faster than join.

Like this,

select uuid,did from calls union 
select uuid,number_uuid as did from ref_label_no union
select uuid,name as did from labels