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21 lines
740 B
MySQL
21 lines
740 B
MySQL
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WITH
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'0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ' AS x,
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replaceRegexpAll(x, '.', ' ') AS spaces,
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concat(substring(spaces, 1, rand(1) % 62), substring(x, 1, rand(2) % 62), substring(spaces, 1, rand(3) % 62)) AS s,
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trimLeft(s) AS sl,
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trimRight(s) AS sr,
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trimBoth(s) AS t,
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replaceRegexpOne(s, '^ +', '') AS slr,
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replaceRegexpOne(s, ' +$', '') AS srr,
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replaceRegexpOne(s, '^ *(.*?) *$', '\\1') AS tr
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SELECT
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replaceAll(s, ' ', '_'),
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replaceAll(sl, ' ', '_'),
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replaceAll(slr, ' ', '_'),
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replaceAll(sr, ' ', '_'),
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replaceAll(srr, ' ', '_'),
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replaceAll(t, ' ', '_'),
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replaceAll(tr, ' ', '_')
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FROM numbers(100000)
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WHERE NOT ((sl = slr) AND (sr = srr) AND (t = tr))
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