I am building a website in ASP.NET with SQL Server 2012 use in back end.
And I also have drop down boxes that contain the following strings as an example.
<asp:ListItem>abc</asp:ListItem>
<asp:ListItem>zyz</asp:ListItem>
<asp:ListItem>dood</asp:ListItem>
<asp:ListItem>foo</asp:ListItem>
What sort of SQL command do I need to in order to be able to use logic like this pseduo.
If SelectedItem is 'abc' return all rows in column
ELSE IF
Retrieve records in column where alphabet_text = ListItem.
I dont want to use a simple IF ELSE stored procedure because I have lots and lots of filtering options available and making else seems really badly designed.
Use
WHEREwithOR:SELECT IdCol, TextCol
FROM dbo.Table
WHERE @TextCol = 'Doesnt matter' OR TextCol = @TextCol
On this way TextCol will only be evaluated if the paramater is different than Doesn't matter.
Note that i've used the text value just for demontsration purposes. You should use the IdCol instead since(text can change anyway).