Question

ALTER TABLE WorkOrder
    ADD CONSTRAINT Wo_system PRIMARY KEY (WorkOrderNumber,AssetCode)

当我尝试执行上述查询时，发生以下错误：

Msg 1779, Level 16, State 0, Line 1
Table 'WorkOrder' already has a primary key defined on it.
Msg 1750, Level 16, State 0, Line 1
Could not create constraint. See previous errors.

我删除了主键WorkOrderNumber，但仍然会产生相同的错误。

有人能为我解决这个问题吗？

Answer 1

ALTER TABLE WorkOrder
    DROP CONSTRAINT pk_wrkord 
GO
ALTER TABLE WorkOrder
      ADD CONSTRAINT Wo_system PRIMARY KEY (WorkOrderNumber,AssetCode)
GO

Answer 2

你可能没有放下钥匙：

尝试

exec sp_pkeys 'workorder'

当我尝试在表中创建复合主键时发生错误？

2 个答案: