Sandir

/*
Description:

This procedure gets current table and index sizes of particular database and stores it to tables.

*/

BEGIN

SET NOCOUNT ON;

DROP TABLE IF EXISTS #AllTablesIndexes;
DROP TABLE IF EXISTS #AllTables;
DROP TABLE IF EXISTS #AllIndexes;

DECLARE @DatabaseName sysname =
'DWH';

DECLARE @TableName sysname =
'';

DECLARE @SchemaName sysname =
'';

DECLARE @TableMatch AS bit =
0;



IF @TableMatch = 0
BEGIN
SET @TableName = CONCAT(N'%', @TableName, N'%')
END;



DECLARE @NewDatabaseName sysname = CONCAT('''',@DatabaseName, '''');
DECLARE @NewTableName sysname = CONCAT('''',@TableName, '''');
DECLARE @NewSchemaName sysname = CONCAT('''',@SchemaName, '''');

DECLARE @SQL nvarchar(2000);



CREATE TABLE #AllTablesIndexes (
[DBID] int NOT NULL,
[DBname] nvarchar(128) NOT NULL,
[TableName] nvarchar(128) NOT NULL,
[TableID] int NOT NULL,
[FullTableName] nvarchar(386) NOT NULL,
[IndexName] nvarchar(128),
[IndexType] nvarchar(60) NOT NULL,
[IndexSubType] nvarchar(60) NOT NULL,
[Rows] bigint NOT NULL,
[TotalPages] bigint NOT NULL,
[UsedPages] bigint NOT NULL,
[UnusedPages] bigint NOT NULL,
[CreateDateTime] datetime2(3),
[ModifyDateTime] datetime2(3)
);


SET @SQL =
CONCAT('USE [?];
SELECT
DB_ID (DB_NAME()) AS [DBID],
DB_NAME() AS [DBname],
t.[name] AS [TableName],
t.[object_id] AS [TableID],
CONCAT(N''['',DB_NAME(),N''].'', N''['', s.[name], N''].'', N''['', t.[name], N'']'') AS [FullTableName],
i.[name] AS IndexName,
CASE
WHEN i.index_id = 0 THEN ''HEAP''
WHEN i.index_id = 1 THEN ''CLUSTERED''
WHEN i.index_id > 1 THEN ''NONCLUSTERED''
END AS [IndexType],
CASE
WHEN i.type = 0 THEN ''HEAP''
WHEN i.type = 1 THEN ''ROWSTORE''
WHEN i.type = 2 THEN ''ROWSTORE''
WHEN i.type = 3 THEN ''XML''
WHEN i.type = 4 THEN ''Spatial''
WHEN i.type = 5 THEN ''COLUMNSTORE''
WHEN i.type = 6 THEN ''COLUMNSTORE''
WHEN i.type = 7 THEN ''HASH''
END AS [IndexSubType],
p.[Rows],
SUM(a.total_pages) AS TotalPages,
SUM(a.used_pages) AS UsedPages,
SUM(a.total_pages) - SUM(a.used_pages) AS UnusedPages,
t.create_date AS CreateDate,
t.modify_date AS ModifyDate
FROM sys.tables AS t WITH(NOLOCK)
INNER JOIN sys.schemas AS s WITH(NOLOCK) ON t.schema_id = s.schema_id
INNER JOIN sys.indexes AS i WITH(NOLOCK) ON t.object_id = i.object_id
INNER JOIN sys.partitions AS p WITH(NOLOCK) ON i.object_id = p.object_id AND i.index_id = p.index_id
INNER JOIN sys.allocation_units AS a WITH(NOLOCK) ON p.partition_id = a.container_id
WHERE 1=1
AND (ISNULL(', @NewDatabaseName,', '''') = '''' OR DB_NAME() = ',@NewDatabaseName,')
AND (ISNULL(',@NewTableName,', '''') = '''' OR t.[Name] LIKE ',@NewTableName,')
AND (ISNULL(', @NewSchemaName, ', '''') = '''' OR s.[Name] LIKE ', @NewSchemaName, ')
GROUP BY
t.[name],
t.[object_id],
CONCAT(N''['',DB_NAME(),N''].'', N''['', s.[name], N''].'', N''['', t.[name], N'']''),
i.[name],
i.index_id,
i.type,
p.[Rows],
t.create_date,
t.modify_date');

INSERT INTO #AllTablesIndexes
EXEC sp_msforeachdb @SQL -- max 2000 size :(


SELECT
[DBID]
,[DBname]
,[TableName]
,[TableID]
,[FullTableName]
,[IndexName]
,[IndexType]
,[IndexSubType],

SUM([rows]) AS [RowCount],
SUM(TotalPages) AS [TotalPages],
SUM(UsedPages) AS [UsedPages],
SUM(TotalPages) - SUM(UsedPages) AS [UnusedPages],

CAST((SUM(TotalPages) * 8) / 1024.00 as decimal(18,0)) AS [TotalSpace_MB],
CAST((SUM(UsedPages) * 8) / 1024.00 as decimal(18,0)) AS [UsedSpace_MB],
CAST((SUM(TotalPages) * 8) / 1024.00 as decimal(18,0)) - CAST((SUM(UsedPages) * 8) / 1024.00 as decimal(18,0)) AS [UnusedSpace_MB],
-- show
REPLACE(CONVERT(VARCHAR, CONVERT(MONEY, SUM([rows]) ), 1), '.00', '') AS [RowCount_show],

REPLACE(CONVERT(VARCHAR, CONVERT(MONEY, SUM(TotalPages)), 1), '.00', '') AS [TotalPages_show],
REPLACE(CONVERT(VARCHAR, CONVERT(MONEY, SUM(UsedPages)), 1), '.00', '') AS [UsedPages_show],
REPLACE(CONVERT(VARCHAR, CONVERT(MONEY, SUM(TotalPages) - SUM(UsedPages)), 1), '.00', '') AS [UnusedPages_show],

REPLACE(CONVERT(VARCHAR, CONVERT(MONEY, CAST((SUM(TotalPages) * 8) / 1024.00 as decimal(18,0))), 1), '.00', '') AS [TotalSpace_MB_show],
REPLACE(CONVERT(VARCHAR, CONVERT(MONEY, CAST((SUM(UsedPages) * 8) / 1024.00 as decimal(18,0))), 1), '.00', '') AS [UsedSpace_MB_show],
REPLACE(CONVERT(VARCHAR, CONVERT(MONEY, CAST((SUM(TotalPages) * 8) / 1024.00 as decimal(18,0)) - CAST((SUM(UsedPages) * 8) / 1024.00 as decimal(18,0))), 1), '.00', '') AS [UnusedSpace_MB_show],
[CreateDateTime],
[ModifyDateTime]
INTO #AllTables
FROM #AllTablesIndexes
WHERE 1=1
AND [IndexType] IN ('HEAP', 'CLUSTERED') -- only tables
GROUP BY
[DBID]
,[DBname]
,[TableName]
,[TableID]
,[FullTableName]
,[IndexName]
,[IndexType]
,[IndexSubType]
,[CreateDateTime]
,[ModifyDateTime]



SELECT
[DBID]
,[DBname]
,[TableName]
,[TableID]
,[FullTableName]
,[IndexName]
,[IndexType]
,[IndexSubType],

SUM([rows]) AS [RowCount],

SUM(TotalPages) AS [TotalPages],
SUM(UsedPages) AS [UsedPages],
SUM(TotalPages) - SUM(UsedPages) AS [UnusedPages],

CAST((SUM(TotalPages) * 8) / 1024.00 as decimal(18,0)) AS [TotalSpace_MB],
CAST((SUM(UsedPages) * 8) / 1024.00 as decimal(18,0)) AS [UsedSpace_MB],
CAST((SUM(TotalPages) * 8) / 1024.00 as decimal(18,0)) - CAST((SUM(UsedPages) * 8) / 1024.00 as decimal(18,0)) AS [UnusedSpace_MB],
-- show
REPLACE(CONVERT(VARCHAR, CONVERT(MONEY, SUM([rows]) ), 1), '.00', '') AS [RowCount_show],
REPLACE(CONVERT(VARCHAR, CONVERT(MONEY, SUM(TotalPages)), 1), '.00', '') AS [TotalPages_show],
REPLACE(CONVERT(VARCHAR, CONVERT(MONEY, SUM(UsedPages)), 1), '.00', '') AS [UsedPages_show],
REPLACE(CONVERT(VARCHAR, CONVERT(MONEY, SUM(TotalPages) - SUM(UsedPages)), 1), '.00', '') AS [UnusedPages_show],
REPLACE(CONVERT(VARCHAR, CONVERT(MONEY, CAST((SUM(TotalPages) * 8) / 1024.00 as decimal(18,0))), 1), '.00', '') AS [TotalSpace_MB_show],
REPLACE(CONVERT(VARCHAR, CONVERT(MONEY, CAST((SUM(UsedPages) * 8) / 1024.00 as decimal(18,0))), 1), '.00', '') AS [UsedSpace_MB_show],
REPLACE(CONVERT(VARCHAR, CONVERT(MONEY, CAST((SUM(TotalPages) * 8) / 1024.00 as decimal(18,0)) - CAST((SUM(UsedPages) * 8) / 1024.00 as decimal(18,0))), 1), '.00', '') AS [UnusedSpace_MB_show],
[CreateDateTime],
[ModifyDateTime]
INTO #AllIndexes
FROM #AllTablesIndexes
WHERE 1=1
AND [IndexType] IN ('NONCLUSTERED', 'CLUSTERED') -- only tables
GROUP BY
[DBID]
,[DBname]
,[TableName]
,[TableID]
,[FullTableName]
,[IndexName]
,[IndexType]
,[IndexSubType]
,[CreateDateTime]
,[ModifyDateTime]

INSERT INTO [maint].[tTableSizes]
SELECT
'TblStats' AS TableStats,
[DBname],
[TableName],
[FullTableName],
[IndexType],
[IndexSubType],
[RowCount],
[TotalPages],
[UsedPages],
[UnusedPages],
[TotalSpace_MB],
[UsedSpace_MB],
[UnusedSpace_MB],
CAST(GETDATE() AS date) AS SnapshotDate
FROM #AllTables
ORDER BY TotalSpace_MB desc

INSERT INTO [maint].[tIndexSizes]
SELECT
'IndexStats' AS IndexStats,
[DBname],
[FullTableName],
[IndexName],
[IndexType],
[IndexSubType],
[RowCount],
[TotalPages],
[UsedPages],
[UnusedPages],
[TotalSpace_MB],
[UsedSpace_MB],
[UnusedSpace_MB],
CAST(GETDATE() AS date) AS SnapshotDate
FROM #AllIndexes
WHERE 1=1
AND [IndexType] IN ('NONCLUSTERED') -- only NONCLUSTERED indexes
ORDER BY TotalSpace_MB desc

END

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Question of the Day

The Empty Aggregate

I have this table in a SQL Server 2025 database: 

CREATE TABLE [dbo].[CustomerOrder]
(
[OrderID] [int] NULL,
[CustomerID] [int] NULL,
[total] [money] NULL
) ON [PRIMARY]
GO
What is returned from this code? (answers are for the sum and then the count) 
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FROM dbo.CustomerOrder;

See possible answers