Usage: sqlite3mysql [OPTIONS] Options: -f, --sqlite-file PATH SQLite3 database file [required] -t, --sqlite-tables TUPLE Transfer only these specific tables (space separated table names). Implies ...
在数据库领域中,全文检索解决了 like '%关键字%' 查询的性能瓶颈问题。传统的关系型数据库使用 like 进行模糊查询时,由于无法利用索引,需要对每行数据进行全表扫描,当数据量达到百万级别时,查询性能急剧下降。而全文检索通过建立倒排索引等机制,实现了亚秒级的检索响应。
作为一名DBA,你是否曾在面对性能瓶颈时感到无从下手?是否在处理慢查询时,面对复杂的执行计划感到困惑?答案其实都藏在执行计划中。令人惊讶的是,许多DBA并未能正确解读执行计划,这直接影响了数据库性能调优的效果。今天,我们将深入探讨Oracle、MySQL和PostgreSQL三大数据库执行计划的区别,助你成为更出色的DBA。
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