fetch no of rows from table 2 with id of table 1 - mysql

Question

I have some thing to do here with subquery but I am not able to do.
I want the result from a table with a extra field to show to no of results from other table with a column value from table 1.
table1:
CountryId Country ISO2 ISO3
table2:
id noof_country state
I have to retrive noof_country count in table 1 as count field
EDIT
my actual tables are
table 1:
ad_id job_country status delete days_left
table 2:
CountryId Country ISO2 status
I have done query in two phase:
$sql_map = "select distinct c.ISO2, c.Country, a.job_country
from rec_countries c, rec_advert a
where c.status = 1
and DATE(a.modified_date) >= CURDATE() - INTERVAL 30 DAY
and c.ISO2 <> '--'
and c.ISO2 <> ''
and c.CountryId = a.job_country
and a.status = 1
and a.`delete` = 0
and a.days_left >0
";
$res = mysql_query($sql_map);
while($row = mysql_fetch_array($res)){
$jobs_no = count($row['job_country']);
$sql_job = "SELECT COUNT( job_country ) AS jobs_no
FROM rec_advert
WHERE job_country = ".$row['job_country']."
and status = 1
and `delete` = 0
and days_left >0";
$resjob=mysql_query($sql_job);
$rowjob = mysql_fetch_array($resjob);
//here jobs_no is the count of total rows
}
Here I want to do with subquery.

Answer 1

If I read the question right, this should work:
SELECT
CountryId,
Country,
ISO2,
ISO3,
(
SELECT COUNT(DISTINCT noof_country)
FROM table2
WHERE table2.id = table1.CountryId
) AS noof_country_count
FROM table1
It's not immediately clear in your question which column in table1 is a foreign key to which column in table2... or if they are even related that way. If this query doesn't work for you, please clarify your schema.
Based on your updated information, try this:
select distinct c.ISO2, c.Country, a.job_country,
(
select COUNT(a2.job_country)
from rec_advert a2
where a2.job_country = a.job_country
and a2.status = 1
and a2.`delete` = 0
and a2.days_left >0
) as jobs_no
from rec_countries c, rec_advert a
where c.status = 1
and DATE(a.modified_date) >= CURDATE() - INTERVAL 30 DAY
and c.ISO2 <> '--'
and c.ISO2 <> ''
and c.CountryId = a.job_country
and a.status = 1
and a.`delete` = 0
and a.days_left >0