unique index vs non-unique index
摘要:
Question:What is between between "unique index vs non-unique index". Which one is faster. The customer using non-unique and sql is getting delay If we change tp non-unique. Is it work ?Answer:Indexes ... 阅读全文
posted @ 2009-06-30 00:08 Oracle和MySQL 阅读(232) 评论(0) 推荐(0) 编辑