sql in subquery 在 Join vs. sub-query - Stack Overflow 的評價 sub-query · sql mysql subquery join. I am an old-school MySQL user and have always preferred JOIN over sub-query ... ... <看更多>
sql in subquery 在 Counting rows from a subquery - Database Administrators ... 的評價 However this query returns 17 because there are 17 rows in the ports table: SELECT COUNT(ip_address) FROM `ports`;. See this SQL Fiddle. Sample data with 17 ... ... <看更多>
