paradox7 的技术指标(50分)

  • 主题发起人 主题发起人 bobiy
  • 开始时间 开始时间
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bobiy

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GUEST, unregistred user!
我想从DBASE转到PARADOX上来,但不知P7的标准(如各数据类型的长度等)


 
max record : 20亿
max filed : 255
record max char :32750
 
能详细点吗?
比如:字段类型、 各类型的长度等

先谢谢了!
 
Paradox field types and sizes

See also

The valid Paradox field types and sizes are

Symbol Size Type



A 1 - 255 Alpha
N Number
$ Money
S Short
I Long Integer
# 0 - 32* BCD
D Date
T Time
@ Timestamp
M 1 - 240** Memo
F 0 - 240** Formatted Memo
G 0 - 240*** Graphic
O 0 - 240*** OLE
L Logical
+ Autoincrement
B 0 - 240*** Binary

Y 1 - 255 Bytes

* Number of digits after the decimal point
** Memo and formatted memo fields can be virtually any length. The value you specify in the Create Table dialog box refers to the amount of the memo Database Desktop stores in the table (1 to 240 characters for memos and 0 to 240 characters for formatted memos). The entire memo is stored outside the table. For example, if you assign a size value of 45 to the field, Database Desktop stores the first 45 characters in the table. It stores the whole memo field in another file (with the extension .MB) and retrieves it as you scroll through the records of the table.

*** Optional

Tip: If all your memos are smaller than a given size (for example, 200 characters), you can save space and time by setting the memo field size equal to or larger than this size. Database Desktop stores the entire memo in the table if it is less than the given size.



 
哎呀,我说这位老兄,我真想劝你去看帮助文件!
 
多人接受答案了。
 

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