Hello, I have a problem with the following query:
SELECT subject_identifier, COUNT(*) FROM asr_sentence_score WHERE total_words = correct_words GROUP BY subject_identifier; OutPut: +--------------------+----------+ | subject_identifier | COUNT(*) | +--------------------+----------+ | 222 | 2 | | 111 | 2 | | 333 | 1 | | 444 | 11 | | 888 | 6 | | 666 | 25 | | 777 | 2 | | 555 | 20 | | 999 | 4 | | 000 | 3 | +--------------------+----------+ 10 rows in set (0.00 sec) The asr_sentence_score table is a list of test results where each row is a single item(sentence) on the test. The subject_identifier is unique to the test taker, and is repeated for each test item. I was using this query to compute a count of how many items each test taker scored perfectly (total_words = correct_words), but I realized that this excludes a test taker who did not score perfect for any item. I want to output a '0' for those that did not score any item perfectly. My best guess at a solution would be to revise the WHERE clause to something like this: WHERE [total_words = correct_words] OR [COUNT(total_words = correct_words) = 0] but this is bad syntax. I put the brackets there for readability. Thanks, Jon
