有没有办法在插入新行时在MSSQL中强制执行约束检查?即在删除/更新行时是否允许违反约束?
更新:我的意思是FK约束.
您可以创建一个INSERT TRIGGER来检查是否满足条件.这样所有更新都将直接通过.
CREATE TRIGGER employee_insupd ON employee FOR INSERT AS /* Get the range of level for this job type from the jobs table. */ DECLARE @min_lvl tinyint, @max_lvl tinyint, @emp_lvl tinyint, @job_id smallint SELECT @min_lvl = min_lvl, @max_lvl = max_lvl, @emp_lvl = i.job_lvl, @job_id = i.job_id FROM employee e INNER JOIN inserted i ON e.emp_id = i.emp_id JOIN jobs j ON j.job_id = i.job_id IF (@job_id = 1) and (@emp_lvl <> 10) BEGIN RAISERROR ('Job id 1 expects the default level of 10.', 16, 1) ROLLBACK TRANSACTION END ELSE IF NOT (@emp_lvl BETWEEN @min_lvl AND @max_lvl) BEGIN RAISERROR ('The level for job_id:%d should be between %d and %d.', 16, 1, @job_id, @min_lvl, @max_lvl) ROLLBACK TRANSACTION END