Question

I have 2 tables with columns like this:

Table1
    testID  username    topic   information     totalTime
Table2
    questionID  testID  question    choices     answers

I would like to select all columns for a test with partiular testID from Table1 and #number of questions with same testID from Table2, so the resulting table should be like this:

testID  username    topic   information     totalTime questionCount

testID & questionID are primary keys.

How can I form this query? Thanks.

Answer 1

You can do it like this:

Select t1.testID, t1.username, t1.topic, t1.information, t1.totalTime, 
   (select count(questionID) from table2 t2 where t2.testID = t1.testID) as 'questionCount'
from table t1