<snip> One way I have found to implement this is SELECT Table1.id from Table1 JOIN Features USING(id) WHERE Features.FeatureCode='A01' OR Features.FeatureCode='B02' GROUP BY Table1.id HAVING COUNT(*)=2;
e.g. counting the duplications of id and selecting those equal to the number of FeatureCodes I'm searching for. But this seems somehow inelegant, and I'm justing wondering if there's a better way that's staring me in the face.
SELECT DISTINCT f.id FROM Table1 AS t, Features AS f WHERE f.id = t.id AND f.FeatureCode IN ('A01', 'B02');
HTH
mysql, query, sql
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