Question

我想在另一个表中创建相同的表结构..

但它应该创建与旧表的所有主键和索引相同的表结构。

我在下面试过，但它只复制了列..不是主键，也不是索引。

SELECT *
INTO dbo.NewTable
FROM dbo.ExistingTable
WHERE 1 = 2

我怎样才能复制/克隆它？

Answer 1

我发布了一个用于创建数据库克隆的脚本的一部分，我删除了一些部分并且它缺少FK和索引（但PK存在，忽略身份：P）但是应该给你一个提示如何做到这一点

要注意：它没有优化，因为我需要运行它一次而不是按计划运行，我只是使它适用于我的数据库：P修复它以满足您的需求：

declare @DestinationSchema nvarchar(50) = 'frontier'
declare @SourceSchema nvarchar(50) = 'dbo'

select  so.name as TableName
        ,N'create table [' + @DestinationSchema + '].[' + so.name + '] (' + o.list + (case when kc.name IS NULL then '' else ' CONSTRAINT ' + kc.name  + ' PRIMARY KEY CLUSTERED ' + ' (' + LEFT(j.List, Len(j.List)-1) + '))' end) as TableScript
from    sys.objects so
cross apply
    (select 
        -- column name
        '  ['+cl.name+'] ' + 
        -- column type
        t.name + 
        -- type lenght
        (case t.name
            when 'sql_variant' then ''
            when 'text' then ''
            when 'ntext' then ''
            when 'bit' then '' 
            when 'int' then ''
            when 'tinyint' then ''
            when 'smallint' then ''
            when 'bigint' then ''
            when 'timestamp' then ''
            when 'date' then ''
            when 'smalldatetime' then ''
            when 'datetime' then ''
            when 'datetime2' then ''
            when 'real' then ''
            when 'float' then ''
            when 'time' then ''
            when 'decimal' then '(' + cast(cl.[precision] as varchar) + ', ' + cast(cl.scale as varchar) + ')'
            else '('+ (case when cl.max_length = -1 then 'MAX' else cast(cl.max_length as varchar) end) +')' end) + ' ' +
        -- nullable
        (case when cl.is_nullable = 0 then 'NOT ' else '' end ) + 'NULL,'
     from sys.columns cl
            inner join sys.types t on cl.user_type_id = t.user_type_id
     where object_id = so.object_id
     order by cl.column_id
    for xml path('')
    ) o (list)
inner join sys.schemas sch on so.[schema_id] = sch.[schema_id] AND sch.name = @SourceSchema
left join sys.key_constraints kc on so.[object_id] = kc.parent_object_id AND kc.[type] = 'PK' AND kc.[schema_id] = so.[schema_id]
cross apply
    (select N'[' + col.name + '], '
     from   sys.columns col 
                inner join sys.indexes i on col.[object_id] = i.[object_id] and i.is_primary_key = 1
                inner join sys.index_columns ic on ic.object_id = so.object_id and ic.column_id = col.column_id and ic.index_id = i.index_id
     where  col.[object_id] = so.[object_id]
     order by ic.key_ordinal
     for xml path('')) j (list)
cross apply
    (select N'[Destination].[' + col.name + '] = [Source].[' + col.name + '] AND '
     from   sys.columns col 
                inner join sys.indexes i on col.[object_id] = i.[object_id] and i.is_primary_key = 1
                inner join sys.index_columns ic on ic.object_id = so.object_id and ic.column_id = col.column_id and ic.index_id = i.index_id
     where  col.[object_id] = so.[object_id]
     order by ic.key_ordinal
     for xml path('')) k (list)     
where
    so.[type] = 'U'
order by
    so.name

使用约束复制或克隆SQL表

1 个答案: