Use a SQL query to retrieve the unique identifier for a specific subject and a specified score.
P粉779565855
2023-08-02 12:03:01
<p>Want to write a SQL query to get the unique IDs of those with a math score of 80, an English score of 70, and a total score of 400 or greater. The answer will be id-1 and 2</p>
<pre class="brush:php;toolbar:false;">ID Subject Marks
1 Maths 80
1 English 70
1 Hindi 80
1 Science 80
1 SST 90
2 Maths 80
2 English 70
2 Hindi 90
2 Science 80
2 SST 100
3 Maths 80
3 English 60
3 Hindi 90
3 Science 100
3 SST 100</pre>
<p>I'm confused on how to insert two topics together as a filter. <br /><br />Valid query -</p><p><br /></p>
<pre class="brush:php;toolbar:false;">SELECT `ID` FROM `ff`
WHERE (`SUBJECT`='MATHS' AND `MARKS`= 80 AND `ID` IN (SELECT `ID` FROM `ff` GROUP BY `ID` HAVING SUM(`MARKS`) >=400) ) OR (` SUBJECT`= 'ENGLISH' AND `MARKS`=70 AND `ID` IN (SELECT `ID` FROM `ff` GROUP BY `ID` HAVING SUM(`MARKS`) >=400) )</pre>
<p>But this does not give the expected results. </p>
You can use conditional aggregation.