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SQL 2021-09-04 02:21:02
sql query for getting data with join and count
Correlated subquery SELECT job_Desc ,(select count(*) from employee where employee.job_id = jobs.job_id) as count FROM Jobs ORDER BY 2 refrence: https://azagappan.wordpress.com/2006/06/23/using-count-with-joins/#:~:text=COUNT(*)%20returns%20the%20numbe... Add solution -
SQL 2021-09-03 13:09:02
mysql update with join
You often use joins to query rows from a table that have (in the case of INNER JOIN) or may not have (in the case of LEFT JOIN) matching rows in another table. In MySQL, you can use the JOIN clauses in the UPDATE statement to perform the cross-table updat... Add solution -
Other 2021-08-31 19:24:01
last select in rails
Statistic.joins("inner join (select customer_id,max(created_at) as created_at from statistics group by customer_id) as stats2 on statistics.customer_id = stats2.customer_id and statistics.created_at = stats2.created_at").pluck("max(statisti... Add solution