Tsql 选择记录,但如果为空,则显示消息
我知道这很简单,只是语法不正确。如果没有结果,则显示一条消息:Tsql 选择记录,但如果为空,则显示消息,tsql,Tsql,我知道这很简单,只是语法不正确。如果没有结果,则显示一条消息: select COALESCE(select SomeField from SomeTable where [@SomeTableVariable].SomeID = @SomeID, 'none to delete') 如果该查询只返回一行,则: select COALESCE( (select SomeField from SomeTable where [@SomeTableVariable].SomeID = @So
select COALESCE(select SomeField from SomeTable where [@SomeTableVariable].SomeID = @SomeID, 'none to delete')
如果该查询只返回一行,则:
select COALESCE(
(select SomeField from SomeTable where [@SomeTableVariable].SomeID = @SomeID),
'none to delete'
)
应该这样做。如果该查询只返回一行,则:
select COALESCE(
(select SomeField from SomeTable where [@SomeTableVariable].SomeID = @SomeID),
'none to delete'
)
应该这样做。是否希望在返回的每个记录的“if SomeField is null”或“if query returns 0 records”时显示消息?如果查询返回0条记录…是否希望在返回的每个记录的“if SomeField is null”或“if query returns 0 records”时显示消息?如果查询返回0条记录。。。