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  • SQL Server sql 操作

    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;
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  • 原文地址:https://www.cnblogs.com/olmlo/p/3640771.html
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