如何判断数据库中字段类型为bytes的字段,是否为空.(0分)

F

fant

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• 2002-04-26

• #1

如何判断数据库中字段类型为bytes的字段,是否为空.

 

C

chinausa

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• 2003-06-27

• #2

由设计时决定

 

Z

ZRWeng

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GUEST, unregistred user!

• 2003-06-27

• #3

if Query1.FieldbyName('字段').DataType in
[ftBytes,ftSmallint, ftInteger, ftWord, ftFloat, ftCurrency] then

 

N

nanami

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• 2003-06-27

• #4

if Query1.FieldbyName('字段').DataType in [ftBytes]
if query1.FieldByName('字段').IsNull