sql - Replace Left Outer Join Null values with a string -



sql - Replace Left Outer Join Null values with a string -

i want show null values returned left outer bring together string " unregistered".

when value integer or bool, write:

isnull(returnedvalue, 0) returnedvalue

but how can create it:

isnull(returnedvalue, 'unregistered') returnedvalue

i utilize ms sql server.

since need varchar value in same field int/bool, need create sure every row of field has same info type.

isnull(convert(varchar(50), returnedvalue), 'unregistered') returnedvalue

or can utilize case as

case when returnedvalue null 'unregistered' else convert(varchar(50), returnedvalue) end returnedvalue

sql sql-server left-join isnull

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