创建、删除唯一约束：
db2 "alter table tabname add unique(colname)"
db2 "alter table tabname drop unique CONSTNAME "
创建主键约束：
db2 "alter table staff add primary key (id)"
db2 "alter table t_da_jkda_rkxzl drop primary key"
db2数据库创建删除主键约束和创建删除唯一键约束
标签：唯一约束 alt ble 主键约束 add table lte ons 一键