How to change column name while joining the query in mysql

Question

I need to change the column name while joining the MySQL query. I am explaining my code below.

select * from grc_action left join grc_users on grc_action.action_owner=grc_users.user_id  

I am giving my table below.

grc_action:

id    name    action_owner

grc_users:

user_id   name

The above is my table structure and as both has same column name ie-name here I need to change the grc_users table column ie-name while fetching the record. Please help me to solve this problem.

Answer 1

You can use AS

SELECT table1.name AS exampleName, table2.name AS otherName FROM sometable

You can also use this on tables:

SELECT vltn.id, vltn.name FROM veryLongTableName AS vltn

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You dont need to type the AS , you can just do SELECT table1.name exampleName to shorten it, but it increases readbility and maintanability to write it, so I recommend doing it with AS .

Answer 2

You may assign different aliases to the name columns from the two different tables.

select
    ga.id,
    ga.name as action_name,
    ga.action_owner,
    gu.user_id,
    gu.name as user_name
from grc_action ga
left join grc_users gu
    on ga.action_owner = gu.user_id;

Note that I also used table aliases which make the query easier to read. In general, doing SELECT * is undesirable, and it is usually better to explicitly list the columns you want.

Answer 3

select * 
from grc_action 
left join grc_users on grc_action.action_owner=grc_users.user_id 

changed query use this query

select *,grc_users.name as grcuser_name,grc_action.name as grcaction_name 
from grc_action 
left join grc_users on grc_action.action_owner=grc_users.user_id 

Here geting two name like this grcuser_name , grcaction_name