Online waiting for, how to judge whether is essentially image field is empty, thank you!-CodePudding

Home > Software engineering > Online waiting for, how to judge whether is essentially image field is empty, thank you!

Online waiting for, how to judge whether is essentially image field is empty, thank you!

Time：10-06

Online waiting for, how to determine whether used image field is empty

CodePudding user response:

 SELECT DATALENGTH (imgField) 
The FROM...

CodePudding user response:

If read judge again, is the isnull (image)

CodePudding user response:

Select the from,,,
If is null (... )
Then
.
The Else
. end if

CodePudding user response:

A variable size Image fields, the data to the client, and then know whether is empty,
For such a design can only ha ha!