my first time doing a date calculation on my system
as you can see here on my first query how would i say that my expdate table is equal to this current date? then if so msgbox me "your item has expired"
on my second query i wanted to set a msgbox where msgbox me three months before my expdate ?
heres what i tried to do
cn.Open()
Dim query As String
query = "Select * from tblmeds where TIMESTAMPDIFF(MONTH,`expdate`,CURRENT_TIMESTAMP())< 1"
command = New MySqlCommand(query, cn)
readers = command.ExecuteReader
Dim count As Integer
count = 0
While readers.Read
count = count + 1
End While
cn.Close()
If count = 1 Then
msgbox "you have a expired items"
else
"no items are at risk"
PS:i am currently using PHPMYADMIN as my database
Assuming SQL SErver...
Subtract 3 months from the expiration date and compare that to the utc date (if multiple timezones are involved) otherwise you could just use getDate()
SELECT EXPDATE
FROM tblMeds
WHERE Dateadd(Month, -3,expDate) < = getutcdate()
If you change you query to
query = "Select count(*) as cnt from tblmeds where TIMESTAMPDIFF(MONTH,`expdate`,CURRENT_TIMESTAMP())< 1"
Then you won't need a look to count the rows, the server can do that which is faster.
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