比較InnoDb和MyIsam MySql表的平等

Question

我想比較兩個獨立數據庫中的兩個MySql表，一個使用MyIsam引擎，另一個使用InnoDb引擎。

我需要能夠快速確定表是否存儲相同的值。我通過使用MD5哈希比較開始了這一工作，但失敗了;我認爲它是因爲數據庫引擎不同。

有沒有人有任何意見，我怎麼可以比較兩個表的平等？

注：

這是正在寫在C＃.NET應用程序，所以我寧願一個C＃實現，而不是一個MySQL引擎的實現。一般來說，每個表總共有210列和0到100行之間的任何地方。

Answer 1

當然不是大表的解決方案，而是自動增量不同。 您可以使用某個特定事件的cron作業自動執行此操作，或者如果您在特定表中顯示一個值，該cron作業將查看，清除並開始它。

CREATE TABLE charlie1 
( billybob INT NOT NULL, 
    birthdate DATETIME NOT NULL, 
    funny_num FLOAT NOT NULL 
)ENGINE=INNODB; 

INSERT INTO charlie1 (billybob,birthdate,funny_num) VALUES (1,'2006-01-02',28832.123); 
INSERT INTO charlie1 (billybob,birthdate,funny_num) VALUES (2,'2004-09-02',18832.888); 
INSERT INTO charlie1 (billybob,birthdate,funny_num) VALUES (3,'2006-07-03',28332.123); 
INSERT INTO charlie1 (billybob,birthdate,funny_num) VALUES (4,'2006-01-02',28852.777); 


SELECT billybob,birthdate,funny_num 
FROM charlie1 
ORDER BY billybob 
INTO OUTFILE '/tmp/charlie1.csv' 
FIELDS TERMINATED BY ',' 
ENCLOSED BY '"' 
LINES TERMINATED BY '\n' 

CREATE TABLE charlie2 
( billybob INT NOT NULL, 
    birthdate DATETIME NOT NULL, 
    funny_num FLOAT NOT NULL 
)ENGINE=MYISAM; 

INSERT INTO charlie2 (billybob,birthdate,funny_num) VALUES (1,'2006-01-02',28832.123); 
INSERT INTO charlie2 (billybob,birthdate,funny_num) VALUES (2,'2004-09-02',18832.888); 
INSERT INTO charlie2 (billybob,birthdate,funny_num) VALUES (3,'2006-07-03',28332.123); 
INSERT INTO charlie2 (billybob,birthdate,funny_num) VALUES (4,'2006-01-02',28852.777); 


SELECT billybob,birthdate,funny_num 
FROM charlie2 
ORDER BY billybob 
INTO OUTFILE '/tmp/charlie2.csv' 
FIELDS TERMINATED BY ',' 
ENCLOSED BY '"' 
LINES TERMINATED BY '\n' 

i changed data in the file to show diff picks it up: 

root@hp:/tmp# diff /tmp/charlie1.csv /tmp/charlie2.csv 
2c2 
< "2","2004-09-02 00:00:00","18832.9" 
--- 
> "2","2004-09-02 00:00:00","18832.8"