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Have a big meeting

Time：10-03

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The

refer to the original poster linjiayina response:

Select * from (select 0 a1 union select 1) t1, t2 (a2 union the select select 0 1), (0 select a3 union select 1) t3, t4 (a4 union the select select 0 1), (select 0 a5 union select 1) t5, t6 (a6 union the select select 0 1);

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