SELECT 1+a, 1 FROM qn WHERE b IN (0,1) AND a<@m UNION ALL SELECT 1+a, 2 FROM qn WHERE b IN (0,2) AND a<@m UNION ALL SELECT 1+a, 3 FROM qn WHERE b IN (0,3) AND a<@m ) SELECT COUNT(*) FROM qn; ERROR ...
"Today, I learned an interesting topic: recursion in MySQL. The first time, I was intimidated, but the second time, I gathered the courage and understood it step by step. Now, I feel much more ...
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