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Apache Impala SQL Reference - Cloudera Documentation

1 | 1 | NULL. |. |. 2 | 1 | NULL. |. |. 3 | 1 | NULL. |. |. 4 | 2 | NULL. |. |. 5 | 2 ... -> SELECT 1 num UNION ALL. -> SELECT 2 num UNION ALL. -> SELECT 3 num ...



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