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怎么写sql按首列降序排序 |
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@qihangcom 记录总数有多少？ |
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记录总数有5万多条 |
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可以试试新的版本 |
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使用order by查询执行时间很长，怎么优化呢
select * from tableName t order by t.ts desc LIMIT 20 OFFSET 0
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