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January 27, 2015 17:06
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MSSQL: list tables, indexes, indexed columns, etc
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--Source: http://simplesqlserver.com/2013/11/20/indexing-fundamentals/ | |
DECLARE @TableName VarChar(100) | |
SELECT @TableName = '%' | |
SELECT TableName = i.SchemaName + '.' + i.TableName | |
, IndexName = ISNULL(i.IndexName, '[' + Lower(i.IndexType) + ']') | |
--, SeekUpdateRatio = CASE WHEN i.User_Updates > 0 THEN CAST(i.User_Seeks / CAST(i.User_Updates as DEC(20,1)) as DEC(20,2)) ELSE 0 END | |
, i.User_Updates | |
, i.User_Seeks | |
, i.User_Scans | |
, i.User_Lookups | |
, KeyColumnList = substring((SELECT (', ' + c.name) | |
FROM sys.index_columns ic | |
INNER JOIN sys.columns c ON ic.object_id = c.object_id AND ic.column_id = c.column_id | |
WHERE i.object_id = ic.object_id AND i.index_id = ic.index_id | |
AND ic.is_included_column = 0 | |
ORDER BY ic.key_ordinal | |
FOR XML PATH ('') | |
), 3, 2000) | |
, IncludedColumnList = CASE WHEN i.IndexType IN ('Clustered', 'Heap') THEN '*' ELSE | |
substring((SELECT (', ' + c.name) | |
FROM sys.index_columns ic | |
INNER JOIN sys.columns c ON ic.object_id = c.object_id AND ic.column_id = c.column_id | |
WHERE i.object_id = ic.object_id AND i.index_id = ic.index_id | |
AND ic.is_included_column = 1 | |
ORDER BY c.Name | |
FOR XML PATH ('') | |
), 3, 2000) | |
END | |
, i.filter_definition | |
, i.is_unique | |
--, i.StartTime | |
, i.Used_MB | |
, i.Reserved_MB | |
, Free_MB = i.Reserved_MB - i.Used_MB | |
, i.Row_Count | |
--, DropStatement = 'DROP INDEX [' + i.IndexName + '] ON [' + i.SchemaName + '].[' + i.TableName + ']' | |
FROM | |
( | |
SELECT SchemaName = s.name | |
, TableName = t.name | |
, IndexName = i.name | |
, IndexType = i.type_desc | |
, i.object_id | |
, i.index_id | |
, i.filter_definition | |
, i.is_unique | |
, User_Updates = SUM(ius.User_Updates) | |
, User_Seeks = SUM(ius.user_seeks) | |
, User_Scans = SUM(ius.user_scans) | |
, User_Lookups = SUM(ius.user_lookups) | |
--, StartTime = MIN(ius.StartTime) | |
, i.Used_MB | |
, i.Reserved_MB | |
, i.row_count | |
FROM (SELECT i.name | |
, i.type_desc | |
, i.object_id | |
, i.index_id | |
, i.is_unique | |
, i.filter_definition | |
, Used_MB = SUM(PS.used_page_count) / 128 | |
, Reserved_MB = SUM(PS.reserved_page_count) / 128 | |
, row_count = SUM(PS.row_count) | |
FROM sys.indexes i | |
LEFT JOIN sys.dm_db_partition_stats PS ON i.object_id = PS.object_id AND i.index_id = PS.index_id | |
GROUP BY i.name, i.type_desc, i.object_id, i.index_id, i.is_unique, i.filter_definition) i | |
INNER JOIN sys.all_objects t ON i.object_id = t.object_id | |
INNER JOIN sys.schemas s ON t.schema_id = s.schema_id | |
LEFT JOIN /*DBA..Index_Usage_Stats*/ sys.dm_db_index_usage_stats ius ON ius.object_id = i.object_id | |
AND ius.index_id = i.index_id | |
AND ius.database_id = DB_ID() | |
--AND DatePart(Hour, ius.EndTime) BETWEEN 10 AND 17 | |
--AND DatePart(DW, ius.EndTime) BETWEEN 2 AND 6 | |
WHERE t.name LIKE @TableName | |
GROUP BY s.name, t.name, i.name, i.object_id, i.index_id, i.is_unique, i.type_desc, i.filter_definition, i.Used_MB, i.Reserved_MB, i.row_count | |
) i | |
ORDER BY 1, KeyColumnList |
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