how to use the MySQL subquery to write complex queries
ԭ�ĵ�ַ��http://www.mysqltutorial.org/mysql-subquery/AMySQLsubqueryisaquerythatisnestedinsideanotherquerysuchas SELECT, INSERT, UPDATEor DELETE.Inaddition,aMySQLsubquerycanbenestedinsideanothersubquery.