标签：uniq dex lte const 意思 unique sql nbsp nat
PK - Primary Key
IX - Non-Unique Index
AK - Unique Index (AX should have been AK (Alternate Key))
CK - Check Constraint
DF - Default Constraint
FK - Foreign Key
UK - Unique Key Constraint
标签：uniq dex lte const 意思 unique sql nbsp nat
原文地址：http://www.cnblogs.com/lfxiao/p/6760892.html
