如何在mysql中比较两个结果集？

Question

for(int i=0;i<resultset.length;i++)
{
a = select meta_value from wp_postmeta where meta_key ='movie name' and post_id = resultset(i)
}
resultset = (select object_id from wp_term_relationships where term_taxonomy_id = (select term_taxonomy_id from wp_term_taxonomy where taxonomy = 'actors' and term_id = (Select term_id from wp_terms where name = 'Aamir khan'))


for(int i=0;i<resultset.length;i++)
{
b = select meta_value from wp_postmeta where meta_key ='movie name' and post_id = resultset(i)
}
resultset = (select object_id from wp_term_relationships where term_taxonomy_id = (select term_taxonomy_id from wp_term_taxonomy where taxonomy = 'actors' and term_id = (Select term_id from wp_terms where name = 'Salman khan'))

the value for a & b are the names of the movies done by these actors, i just want to compare these two, and if there is any common movie then it will display that. If i am not on the write path then please tell me the right path. This has to be done on wordpress

Answer 1

您可以对两个结果使用JOIN： 这是一个快速介绍 。