有传言说:
SELECT * FROM lineage_string where lineage like '%179%' and lineage regexp '(^|/)179(/|$)'
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会比这更快:
SELECT * FROM lineage_string where lineage regexp '(^|/)179(/|$)'
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谁能确认一下?或者知道一种测试这种查询速度的好方法.谢谢
mysql ×1