难以从4个表中获取数据

Question

I have four tables in my DB - one, called kursplan, 2nd table is kursplan_kurse,3rd table is kursplan_kursraum 4th table is kursplan_trainer.

The 1st table Structure: id,club_id,Tag,Kurse_namen,from,to,Kursleiter,kursraum

here club_id means my user id in my user table

id     |   club_id         |    Tag      |Kurse_namen  | Kursleiter| kursraum
____________________________________________________________________________________________
1      |         35         |     Monday |2           |2           | 4
2      |         35         |     tue    |3           |3           | 3
3      |         35         |    wen     |3           |3           | 3 
4      |         12         |    thu     |1           |2           | 4

The 2nd table Structure:table name[kursplan_kurse]

id     |    club_id    | Kurse_namen    
______________________________________
1      |         35       |     Kurse1
2      |         35       |     Kurse2
3      |        35        |     Kurse3
4      |         35       |    Kurse4

The 3rd table Structure:table name[kursplan_kursraum]

id     |    club_id    | kursraum   
______________________________________
1      |         35        |     kursraum1
2      |         35         |    kursraum2
3      |        35         |     kursraum3
4      |         35       |    kursraum4

The 4thtable Structure:table name[kursplan_trainer]

id     |    club_id    | Kursleiter 
______________________________________
1      |         35        |     Kursleiter1
2      |         35         |    Kursleiter2
3      |        35         |    Kursleiter3
4      |         35       |  Kursleiter4

My select query is

$query = "SELECT * FROM `kursplan` WHERE `club_id` = '35' AND `Tag` = 'Monday' ";

I am geting the result in this format

Kurse_namen | kursraum  |Kursleiter |
=====================================
2           | 4        |2          |

Now, what I want to achieve is to setup a JOIN query for get values from all 3 tables that are 2nd,3rd,4th tables

I need the result in this format I MEAN Instead of numbers i want names

Kurse_namen    |   kursraum       | Kursleiter     
______________________________________________
Kurse2     |   kursraum4  |    Kursleiter2

Please help me.

Answer 1

Although your question is not clear if you are having related to joins you can understand it through this sql.

    select t2.Kurse_namen,t3.kursraum,t4.Kursleiter
    from table2 t2,table3 t3,table4 t4,table1 t1
    where t2.club_id=t3.club_id
    and t3.club_id=t4.club_id
    and t1.club_id=t2.club_id
    and t2.club_id=35
    and t1.tag='Monday'