constraint

• The column has a value that violates the constraint
  该列包含一个违反约束的值。
• No primary key constraints are created locally
  本地不创建任何primary key约束。
• Constraint was enabled without checking existing rows
  启用约束时未检查现有行。
• Here is an ocl constraint to illustrate this point
  以下是说明这一点的ocl约束：
• You can define many check constraints for a table
  可以为表定义多个check约束。
• Constraint with other constraints , it must be specified last
  约束必须最后指定：
• Setting precedence constraints on tasks and containers
  >对任务和容器设置优先约束
• If a constraint is unnecessary , change it
  如果某个限制是不必要的，请修改它。
• How to : disable foreign key constraints for replication
  如何：对复制禁用外键约束