Aventurine Yao
Wednesday, March 3, 2010
UNIQUE vs. DISTINCT - Database Design
UNIQUE vs. DISTINCT - Database Design
In SQL:
UNIQUE: constrain on value in specific column.
DISTINCT: retrieve one instance for each possible value.
0 comments:
Post a Comment
Newer Post
Older Post
Home
Subscribe to:
Post Comments (Atom)
0 comments:
Post a Comment