In MYSQL, let's say I have following two tables.
"profile":
fullname | gender | country_code
-----------------------------------
Alex | M | us
Benny | M | fr
Cindy | F | uk
"country":
country_code | country_name
-----------------------------
jp | Japan
us | United States of America
fr | France
sg | Singapore
uk | United Kingdom
While querying from "profile"
table's perspective, like this:
WHERE fullname = 'Cindy'
Then in the result, how do i include a column from another Table (to get the results like this below):
fullname | gender | country_code | country_name
------------------------------------------------
Cindy | F | uk | United Kingdom
You can use
select a.fullname, a.gender, b.country_code, b.country_name
FROM profile a
LEFT JOIN country b ON a.country_code = b.country_code
WHERE a.fullname='Cindy'
You need to JOIN the tables. For example:
select a.fullname, a.gender, b.country_code, b.country_name
from profile a JOIN country b
on a.country_code = b.country_code
where a.fullname='Cindy'
请尝试以下操作:
Select * from profile natural join country where fullname='Cindy'
select fullname, gender, profile.country_code as country_code, country_name from profile join country on profile. country_code = profile.country_code where fullname = "Cindy";
You should use JOIN :
SELECT profile.*, country.country_name
FROM Customers
INNER JOIN Orders
ON profile.country_code=country.country_code
For more info check this : http://www.w3schools.com/sql/sql_join_inner.asp
Try this..
SELECT t1.fullname, t1.gender t1.country_code,t2.country_name
FROM profile AS t1 INNER JOIN country AS t2 ON t1.country_code = t2.country_code where t1.fullname='cindy';
select p.fullname,p.gender,p.country_code,c.country_name from profile p
INNER JOIN country c on p.country_code=c.country_code where p.fullname='Cindy'
You need to use join between profile and country table as below
SELECT
profile.fullname,
profile.gender,
country .country_code,
country .country_name
FROM profile as profile JOIN country as country
ON (profile.country_code = country.country_code)
WHERE profile.fullname = 'Cindy'
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.