Question

我在客户端表上使用两种备份形式。有时我使用mysqldump，有时我使用SQLYog备份。

SQLYog以这种方式创建插入：

insert  into `tbb111`(`PPU_NOME_USU`,`PPU_NOME_PRG`,`PPU_SEQ_PRG`,`PPU_DES_PPU`) values ('RACHEL','SDMW','0','Todas     ;01012014;28022014;00001;;;');
insert  into `tbb111`(`PPU_NOME_USU`,`PPU_NOME_PRG`,`PPU_SEQ_PRG`,`PPU_DES_PPU`) values ('RACHEL','SDMW2251','0','01012013;31122014;');
insert  into `tbb111`(`PPU_NOME_USU`,`PPU_NOME_PRG`,`PPU_SEQ_PRG`,`PPU_DES_PPU`) values ('RACHEL','SDMW2290','0','Todos;01012013;31122014;;;;00000000000;99999999999;;');

mysqldump以这种方式创建：

INSERT INTO `sdm638` VALUES 
('1','1','201402','1002','Computadores e Periféricos','0','0','222222','0','733.4800','539.3200','1272.8000','0.0000','0.0000','0.0000','0.0000','0','0','0'), 
('1','1','201402','1008','Veículos','0','0','222222','0','0.0000','42900.0000','42900.0000','0.0000','0.0000','0.0000','0.0000','0','0','0'),
('1','1','201402','2001','Água e Esgoto','0','0','222222','0','458.6400','458.6400','917.2800','0.0000','0.0000','0.0000','0.0000','0','0','0'),
('1','1','201402','2002','Combustível','0','0','222222','0','0.0000','237.6000','237.6000','0.0000','0.0000','0.0000','0.0000','0','0','0'),
('1','1','201402','2004','Copa e Cozinha','0','0','222222','0','463.2000','181.6998','644.8998','0.0000','0.0000','0.0000','0.0000','0','0','0')

Mysqldump显然更好，因为文件要小得多。我刚刚在客户端上测试了mysqldump获得了2.5gb而SQLYog是8gb。

我想知道它们之间的区别。即使没有插入每一行，mysqldump也会一直工作吗？性能是相同的还是mysqldump更快，因为代码更少？

谢谢你们。

Answer 1

功能上两者都是相同的，但从性能的角度来看，后者（mysqldump版本）要快得多，因为不会对每一行执行解析，而是一次执行一堆行。

插入每行或每个表只有一个之间的差异

2 个答案: