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並前往https://www.quora.com/Is-there-any-limit-on-the-number-of-UNION-ALL-statements-in-a-single-SQL-query-on-Oracle-database

Is there any limit on the number of UNION ALL statements in a ...

I don't know about Oracle, but I've occasionally done this in MySQL to get a big list of program-generated stuff into a “tabular form” in something like ...

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