java-sql篇

時間 2021-01-22

原文原文鏈接

1、數據庫引擎 Innodb和myisam 對比，mysql 5.5之前默認是myisam，5.5之後爲 innodb 2、mysql索引普通索引唯一索引主鍵組合索引全文索引 es做分詞搜索比較多 3、sql優化 4、sql數據安全像手機號這種入庫要加密

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