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WITH stars (lvl, line) AS ( SELECT 1, '*' FROM dual UNION ALL SELECT lvl + 1, line || ' *' FROM stars WHERE lvl < 20 ) SELECT line FROM stars;
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Draw The Triangle 2
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WITH stars (lvl, line) AS ( SELECT 1, '*' FROM dual UNION ALL SELECT lvl + 1, line || ' *' FROM stars WHERE lvl < 20 ) SELECT line FROM stars;