十六、mysql 分区之 简单sql优化2_MySQL
1.索引的分类 B-Tree 基本支持 HASH 只有memory支持 R-Tree myisam支持 Full-text myisam支持(全文索引)2.Memory引擎下只有“=”条件才会使用索引=============================== 导入数据的优化 ========================3.如何提高myisam的导入效率 alter table emp disable keys;关闭索引 load data infile 'aa.sql' into table emp;导入数据到emp alter table emp enable keys;开启索引 4.如何提高innodb的导入效率 导入的数据按照主键的顺序排列即可5.导入数据前关闭唯一性检查 set unique_checks = 0 ; load data infile .... set unique_checks = 1 ; 开启检查=============================== Insert 的优化 ========================1.使用多值插入 insert into emp values (1,2,3),(1,2,3),.....=============================== 分页 的优化 ==========================1.使用inner join内联2.应用程序端做处理,大概思路就是记录上一页的最后一条记录的id是多少,下一页就以这个id为起始值 但这个必须保证id为唯一性

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