eg:if object_id('t1') is not null
drop table t1
go
create table t1(a float constraint df_t1_a default 0)
go
alter table t1 drop constraint df_t1_a
go
alter table t1 alter column a int
drop table t1
go
create table t1(a float constraint df_t1_a default 0)
go
alter table t1 drop constraint df_t1_a
go
alter table t1 alter column a int
解决方案 »
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