Hi,
What works better (better practice) when creating a unique index that is used in FK constraints on child tables? Unique index using this syntax:
CREATE UNIQUE INDEX IX_deptfile_cost_cent_site_no ON deptfile (cost_cent, site_no )
or creating a constraint using the following syntax:
ALTER TABLE [dbo].[deptfile] ADD CONSTRAINT [IX_deptfile_cost_cent_site_no] UNIQUE NONCLUSTERED
(
[cost_cent] ASC,
[site_no] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, SORT_IN_TEMPDB = OFF, IGNORE_DUP_KEY = OFF, ONLINE = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
?
TIA
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