我正在寻找一个SQL脚本,可用于确定是否有任何数据(即行计数)在给定数据库的任何表。

这样做的目的是在存在任何行(在任何数据库中)的情况下重新具体化数据库。

这里所说的数据库是Microsoft SQL SERVER。

谁能建议一个示例脚本?


当前回答

从information_schema中选择所有行。表视图,并为从该视图返回的每个条目发出count(*)语句。

declare c_tables cursor fast_forward for
select table_name from information_schema.tables

open c_tables
declare @tablename varchar(255)
declare @stmt nvarchar(2000)
declare @rowcount int
fetch next from c_tables into @tablename

while @@fetch_status = 0
begin

    select @stmt = 'select @rowcount = count(*) from ' + @tablename

    exec sp_executesql @stmt, N'@rowcount int output', @rowcount=@rowcount OUTPUT

    print N'table: ' + @tablename + ' has ' + convert(nvarchar(1000),@rowcount) + ' rows'

    fetch next from c_tables into @tablename

end

close c_tables
deallocate c_tables

其他回答

SQL Server 2005或更高版本提供了一个相当不错的报告,显示表大小-包括行数等。这是在标准报告-它是光盘使用表。

在编程上,有一个很好的解决方案: http://www.sqlservercentral.com/articles/T-SQL/67624/

从information_schema中选择所有行。表视图,并为从该视图返回的每个条目发出count(*)语句。

declare c_tables cursor fast_forward for
select table_name from information_schema.tables

open c_tables
declare @tablename varchar(255)
declare @stmt nvarchar(2000)
declare @rowcount int
fetch next from c_tables into @tablename

while @@fetch_status = 0
begin

    select @stmt = 'select @rowcount = count(*) from ' + @tablename

    exec sp_executesql @stmt, N'@rowcount int output', @rowcount=@rowcount OUTPUT

    print N'table: ' + @tablename + ' has ' + convert(nvarchar(1000),@rowcount) + ' rows'

    fetch next from c_tables into @tablename

end

close c_tables
deallocate c_tables
    SELECT
          SUM(sdmvPTNS.row_count) AS [DBRows]
    FROM
          sys.objects AS sOBJ
          INNER JOIN sys.dm_db_partition_stats AS sdmvPTNS
                ON sOBJ.object_id = sdmvPTNS.object_id
    WHERE 
          sOBJ.type = 'U'
          AND sOBJ.is_ms_shipped = 0
          AND sdmvPTNS.index_id < 2
    GO

这是我最喜欢的SQL 2008解决方案,它将结果放入一个“TEST”临时表,我可以使用它来排序并获得我需要的结果:

SET NOCOUNT ON 
DBCC UPDATEUSAGE(0) 
DROP TABLE #t;
CREATE TABLE #t 
( 
[name] NVARCHAR(128),
[rows] CHAR(11),
reserved VARCHAR(18), 
data VARCHAR(18), 
index_size VARCHAR(18),
unused VARCHAR(18)
) ;
INSERT #t EXEC sp_msForEachTable 'EXEC sp_spaceused ''?''' 
SELECT * INTO TEST FROM #t;
DROP TABLE #t;
SELECT  name, [rows], reserved, data, index_size, unused FROM TEST \
WHERE ([rows] > 0) AND (name LIKE 'XXX%')

下面是一个动态SQL方法,它也提供了模式:

DECLARE @sql nvarchar(MAX)

SELECT
    @sql = COALESCE(@sql + ' UNION ALL ', '') +
        'SELECT
            ''' + s.name + ''' AS ''Schema'',
            ''' + t.name + ''' AS ''Table'',
            COUNT(*) AS Count
            FROM ' + QUOTENAME(s.name) + '.' + QUOTENAME(t.name)
    FROM sys.schemas s
    INNER JOIN sys.tables t ON t.schema_id = s.schema_id
    ORDER BY
        s.name,
        t.name

EXEC(@sql)

如果需要,将其扩展为在实例中运行所有数据库(连接到sys.databases)是很简单的。