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WITH RECURSIVE numbers AS (
SELECT 1 AS level
UNION ALL
SELECT level + 1 FROM numbers WHERE level < 20
)
SELECT RPAD('* ', 2 * (21 - level), '* ') AS pattern
FROM numbers
ORDER BY level;
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Draw The Triangle 1
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MySQL:
WITH RECURSIVE numbers AS ( SELECT 1 AS level UNION ALL SELECT level + 1 FROM numbers WHERE level < 20 ) SELECT RPAD('* ', 2 * (21 - level), '* ') AS pattern FROM numbers ORDER BY level;