Question

Ok… I need to do this simple task… I can do it with java or python in a simple way…
But is there any way to do this using sql and delagating the job to the database engine and not to jvm or python?

I have table 1 and table 2

for example

table 1 has 2 stored titles…

“love is a feeling”, “harry potter”

table 2 has 3 stored titles…

“abc”, “physics 1”, “the trip”

Some are different, but some might be coincidential…

I need to compare each entry of table 2 with all the rows returned from a select title from table1…

so it would be like this

it compares “love is a feeling” with “abc” and “physics 1” and “the trip”, if findes a match it increases the count…

it should do that with all the names and in the end I want to know how many coincidences I have…

as I say it can be done with java or any lang by querying:

results = rows returned by using "select title from table1";
while results.next () {
 results2 = rows returned by using "select title from table2";

 while results2.next(){
    if current results == current results2
        count++;    
  }
}

print count

But thats not what I need…

Answer 1

SELECT COUNT(*) FROM table1 JOIN table2 ON table1.title = table2.title

Learn about SQL joins.