Error validating the default for column newsequentialid Live cams mom

ID INTO @output Table VALUES('value1', 'value2')SELECT ID FROM @output Table--2.

标记ID字段为ROWGUID(一个表只能有一个ROWGUID)INSERT INTO TABLE1(col1, col2)VALUES('value1', 'value2')--在这里,ROWGUIDCOL其实相当于一个别名SELECT ROWGUIDCOL FROM TABLE12.

如何设定DEFAULT VALUE为NEWSEQUENTIALID() 通过UI的方式设定默认值时,由于SQL SERVER 2005的BUG(即使是SP2也没有解决),导致我们设置了默认值为NEWSEQUENTIALID()保存时会出现以下错误: Warning were encountered during the pre-save validation process, and might result in a failure during save.

No value generation means that you will always supply a valid value to be saved to the database.

If you are not worried about fragmentation, what's the point?

create table #test(id int, txt varchar(50), gid uniqueidentifier) insert into #test select 1 ,'test','72b48f77-0e26-de11-acd4-001bfc39ff92' union select 2, 'test2', '92f0fc8f-0e26-de11-acd4-001bfc39ff92' union select 3, 'test3', '122aa19b-0e26-de11-acd4-001bfc39ff92' select * from #test order by gid asc create table XXX(some Guid uniqueidentifier DEFAULT NEWSEQUENTIALID(), x INT) create table YYY(some Guid uniqueidentifier DEFAULT NEWSEQUENTIALID(), y Date Time) GO insert into XXX(x) values(1) insert into XXX(x) values(2) insert into XXX(x) values(3) GO insert into YYY(y) values(current_timestamp) insert into YYY(y) values(current_timestamp) insert into YYY(y) values(current_timestamp) GO insert into XXX(x) values(4) insert into XXX(x) values(5) insert into XXX(x) values(6) GO SELECT * FROM XXX 6A6E85CB-CCA3-E111-9E8E-005056C00008 1 6B6E85CB-CCA3-E111-9E8E-005056C00008 2 6C6E85CB-CCA3-E111-9E8E-005056C00008 3 **CCEA7AF2-CCA3-E111-9E8E-005056C00008 4** Gap here because we 'switched' to y CDEA7AF2-CCA3-E111-9E8E-005056C00008 5 CEEA7AF2-CCA3-E111-9E8E-005056C00008 6 SELECT * FROM YYY 8F9438E1-CCA3-E111-9E8E-005056C00008 2012-05-22 .503 909438E1-CCA3-E111-9E8E-005056C00008 2012-05-22 .210 919438E1-CCA3-E111-9E8E-005056C00008 2012-05-22 .220 insert into XXX(x) values(1) insert into XXX(x) values(2) BEGIN TRAN insert into XXX(x) values(3) insert into XXX(x) values(4) ROLLBACK TRAN insert into XXX(x) values(5) insert into XXX(x) values(6) GO 686EFE5B-CDA3-E111-9E8E-005056C00008 696EFE5B-CDA3-E111-9E8E-005056C00008 6C6EFE5B-CDA3-E111-9E8E-005056C00008 6D6EFE5B-CDA3-E111-9E8E-005056C00008 i.e.

如何获得生成的GUID如果生成的GUID所在字段做为外键要被其他表使用,我们就需要得到这个生成的值通常,PK是一个IDENTITY字段,我们可以在INSERT之后执行 SELECT SCOPE_IDENTITY()来获得新生成的ID但是由于NEWSEQUENTIALID()不是一个INDETITY类型,这个办法是做不到了,而他本身又只能在默认值中使用,不可以事先SELECT好再插入,那么我们如何得到呢?有以下两种方法:--1. 定义临时表变量 DECLARE @output Table TABLE(ID uniqueidentifier)INSERT INTO TABLE1(col1, col2)OUTPUT INSERTED.Also, I'm curious as to why you would want to use newsequentialid() when you don't have to.It has many downsides which newid() does not, and none of the benefits - the biggest being that newid() is not practically predictable, whereas newsequentialid() is.a Gap of 2 Guids rolled back and insert into XXX(x) values(1) insert into XXX(x) values(2) insert into XXX(x) values(3) GO insert into XXX(x) values(99999999999999) -- overflow GO insert into XXX(x) values(4) insert into XXX(x) values(5) insert into XXX(x) values(6) go select * from xxx AC613611-CFA3-E111-9E8E-005056C00008 1 AD613611-CFA3-E111-9E8E-005056C00008 2 AE613611-CFA3-E111-9E8E-005056C00008 3 **B0613611-CFA3-E111-9E8E-005056C00008 4** Gap of 1 - overflow failure B1613611-CFA3-E111-9E8E-005056C00008 5 B2613611-CFA3-E111-9E8E-005056C00008 6 NEWSEQUENTIALGUID (as every guid generated in a way that warrant their sequence) includes a part of the Guid calculated via a time stamp.So if you run the inserts at different time you'll see some gaps.

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