Conditional Conditons in SQL Server -

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i have combobox 3 values: all, failed, completed.

all: load rows , no condition. failed , completed: load condition on column 'status'.

all:

select * tbl_location

failed , completed:

select * tbl_location status = 'failed'

or

select * tbl_location status = 'completed'

i have 2 statues 'failed' , 'completed'. 'all' combo-box value load rows without condition

i want in 1 query. can do?

declare @status varchar(15)  --set status  select *  tbl_location status = @status or @status = 'all'

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