2013-06-23 45 views
0

我在我的表中插入幾行,我不知道爲什麼插入的行不會在插入 -SQL INSERT不是爲了

這裏的順序是Java代碼 -

for (Entry<Integer, String> entry : treeMap.entrySet()) { 
    System.out.println("Key: " + entry.getKey() + ". Value: " + entry.getValue()); 
    insert(entry.getKey(), entry.getValue()); //method to insert a single record 
} 

插入查詢:

insert into heightList(heightId,height) values(?,?) 

sysout日誌:(打印爲了所有鍵)

Key: 1. Value: some text 
Key: 2. Value: some text 
Key: 3. Value: some text 
Key: 4. Value: some text 
Key: 5. Value: some text 
Key: 6. Value: some text 
Key: 7. Value: some text 
Key: 8. Value: some text 
Key: 9. Value: some text 
Key: 10. Value: some text 
Key: 11. Value: some text 
Key: 12. Value: some text 
Key: 13. Value: some text 
Key: 14. Value: some text 
Key: 15. Value: some text 
Key: 16. Value: some text 
Key: 17. Value: some text 
Key: 18. Value: some text 
Key: 19. Value: some text 
Key: 20. Value: some text 
Key: 21. Value: some text 
Key: 22. Value: some text 
Key: 23. Value: some text 
Key: 24. Value: some text 
Key: 25. Value: some text 
Key: 26. Value: some text 
Key: 27. Value: some text 
Key: 28. Value: some text 
Key: 29. Value: some text 
Key: 30. Value: some text 
Key: 31. Value: some text 
Key: 32. Value: some text 
Key: 33. Value: some text 
Key: 34. Value: some text 
Key: 35. Value: some text 
Key: 36. Value: some text 
Key: 37. Value: some text 

,但是這是我的表看起來像插入後 -

heightId height 
1  some text 
10  some text 
11  some text 
12  some text 
13  some text 
14  some text 
15  some text 
16  some text 
17  some text 
18  some text 
19  some text 
2  some text 
20  some text 
21  some text 
22  some text 
23  some text 
24  some text 
25  some text 
26  some text 
27  some text 
28  some text 
29  some text 
3  some text 
30  some text 
31  some text 
32  some text 
33  some text 
34  some text 
35  some text 
36  some text 
37  some text 
4  some text 
5  some text 
6  some text 
7  some text 
8  some text 
9  some text 

爲什麼行不是爲了,我怎麼可以將它們按順序?

回答

4

它們按順序插入。但它會出現你插入id號(整數)到基於文本的字段(char/varchar)。文字排序規則爲不是使用數字。

如果他們正在進入一個int字段,然後看看什麼在做實際的排序。

+0

是的字段是'varchar' ... – JAVAGeek

+0

因此將其轉換爲int,然後'按ID順序「將正常工作。就目前而言,它已被正確排序,但僅僅是因爲你在數據庫中說明了現場的情況。嘗試和GUESS在現場做什麼不是數據庫的工作。你已經告訴它它是文本,所以它應用了基於文本的規則。 –

+0

我只是將字段更改爲int,並且數據現在是按順序排列的,我真的不知道這件事 - 謝謝! – JAVAGeek

0

他們被插入順序,一起來看看:

heightId height 
1  some text 
10  some text 
11  some text 
12  some text 
13  some text 
14  some text 
15  some text 
16  some text 
17  some text 
18  some text 
19  some text 
2  some text 
20  some text 

等。如果該字段爲varchar,則數據庫引擎將根據varchar值對值進行排序:這是,11將在之前,並且在3之前將爲29