分解（正常化）將1個表格分成2個表格

Question

我正在附近的約25000條記錄的表格。

Table Namee: tblStdCods 
Table Columns: id, Place, STD Code, State 

有沒有辦法分解表分爲兩個這樣而不影響數據存儲在IT，

tblStdCodes: id, Place, stadcode, stateId 
tblState: stateId, stateName 

Original Table : 

id Place  STDCode State 
1  Ahmednagar 414003 Maharashtra 

Resultanat Tables : 

table 1: 
id Place  STDCode State 
1  Ahmednagar 414003 1 

table 2: 

stateId stateName 
1  Maharashtra 

Answer 1

你必須創建一個你想要的結構兩個表之後，你可以簡單地插入數據從舊錶，就像這樣：

//tblState have the field stateName of type int AUTO_INCREMENT 
INSERT INTO tblState (stateName) SELECT State FROM tblStdCods GROUP BY State; 

//Insert records with the pointer to the state table 
INSERT INTO tblStdCodes (Id,Place, stadcode, stateId) SELECT Id, Place, STD Code, stateID FROM 
tblStdCods JOIN tblState ON State = stateName 

兩個結果表的字段類型將從原來的表中導出，唯一要小心的是個人有T他在AUTO_INCREMENT stateID字段的tblState表中，這樣數據庫會自動生成你的id ...