1、重命名表
将表OLD重命名为NEW:
EXEC sp_rename 'OLD','NEW'
2、重命名列
将表table1中的列old重命名为new:
EXEC sp_rename 'table1.old','new','COLUMN'
3、删除主键:
Declare @Pk varChar(100); Select @Pk=Name from sysobjects where Parent_Obj=OBJECT_ID('tableName') and xtype='PK'; if @Pk is not null exec('Alter table tableName Drop '+ @Pk)
4、创建主键:
ALTER Table tableName ADD CONSTRAINT pkName PRIMARY KEY (pkfield)
5、联表更新
update t1 set t1.column2 = t2.column2 from table1 t,table2 t2 where t.column1 = t2.column1;