sql server 数据删除操作

zly35002024-03-11 12:15

删除

DELETE FROM table_name WHERE id < 10000;

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DELETE FROM [allmedia_restore] WHERE [SYS_DOCUMENTID] < 10000;

清空表

truncate table tableA

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truncate table [allmedia_restore].[dbo].[DOM_4_DOCLIB]

倒序排序

order by [字段] desc

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SELECT TOP 1000 [SYS_DOCUMENTID]
      ,[SYS_CREATED]
  FROM [allmedia_restore].[dbo].[DOM_4_DOCLIB] order by SYS_DOCUMENTID desc

--查询所有表大小，大小倒序排序

选中对应的数据库，执行

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SELECT
TableName = obj.name,
TotalRows = prt.rows,
[DataSize(KB)]=SUM(alloc.data_pages)*8, --这里返回的是数据页个数，1页是8K，所以乘以8
[DataSize(MB)]=SUM(alloc.data_pages)*8/1024.0,
[DataSize(GB)]=SUM(alloc.data_pages)*8/1024.0/1024.0,
[SpaceUsed(KB)] = SUM(alloc.used_pages)*8,--这里返回的是数据页个数，1页是8K，所以乘以8
[SpaceUsed(MB)] = SUM(alloc.used_pages)*8/1024.0,
[SpaceUsed(GB)] = SUM(alloc.used_pages)*8/1024.0/1024.0
FROM sys.objects obj
JOIN sys.indexes idx ON obj.object_id = idx.object_id
JOIN sys.partitions prt ON obj.object_id = prt.object_id
JOIN sys.allocation_units alloc ON alloc.container_id = prt.partition_id
WHERE obj.type = 'U' AND idx.index_id IN (0, 1)
--AND idx.object_id=OBJECT_ID('tablename') 
GROUP BY obj.name, prt.rows
ORDER BY TotalRows desc