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Sybase » Transact-SQL » Coding »

Transact SQL: Conditionals

     




Conditional statements allow branching within stored procedures in a fashion
similar to other languages, like Visual Basic. The example below returns the
matching invoice if a non-zero value is passed to it, otherwise it raises an error.


create procedure proc_rtv_invoice (@inv_id numeric(8,0) as

if @inv_id > 0
select inv_id, inv_date, sales_rep_id
from invoice
where inv_id = @inv_id
else
raiserror 99999 'Error: invalid invoice #'

return
go


Another example, which illustrates the begin and end constructs


create procedure proc_rtv_invoice (@inv_id numeric(8,0)) as

declare @date datetime

if @inv_id > 0
begin
select @date = getdate()

select inv_id, inv_date, sales_rep_id,@date
from invoice
where inv_id = @inv_id
end
else
raiserror 99999 'Error: invalid invoice #'

return
go

Note how the variable @date was declared, and given a value.








Sybase : Related Topics

Sybase : Transact-SQL : Transact SQL: numeric functions
Sybase : Transact-SQL : Transact SQL: string functions
Sybase : Transact-SQL : Transact SQL: date/time functions
Sybase : Transact-SQL : Transact SQL: misc functions
Sybase : Transact-SQL : Transact SQL: looping constructs
Sybase : Transact-SQL : Transact SQL: Cursors
Sybase : Transact-SQL : Transact SQL: Complex Updates
Sybase : Transact-SQL : Transact SQL: Finding duplicate rows in a table
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Sybase : Transact-SQL : Date processing: stripping time from datetime
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Sybase : Transact-SQL : Transact SQL: date/time formats
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