Useful SQL Commands

db_info.sql

/*
	Databases Info
*/

WITH fs
AS
(
    SELECT database_id, TYPE, SIZE * 8.0 / 1024 SIZE
    FROM sys.master_files
)
SELECT 
     db.database_id
	,db.[name]
    ,(SELECT CAST(ROUND(SUM(SIZE),0) AS INT) FROM fs WHERE TYPE = 0 AND fs.database_id = db.database_id) DataFileSizeMB
    ,(SELECT CAST(ROUND(SUM(SIZE),0) AS INT) FROM fs WHERE TYPE = 1 AND fs.database_id = db.database_id) LogFileSizeMB
	,db.collation_name
	,db.compatibility_level
	,db.user_access_desc
	,db.create_date
	,db.state_desc
	,db.recovery_model_desc
	,CAST(CASE WHEN db.name IN ('master','model','msdb','tempdb') THEN 1 
			   ELSE db.is_distributor 
		  END 
		  AS bit) AS [IsSystemObject]
FROM sys.databases db
ORDER BY [IsSystemObject] DESC, db.[name] ASC

tables_size.sql

/*
  Returns all tables size for a database
  source: https://stackoverflow.com/questions/7892334/get-size-of-all-tables-in-database/7892349
*/

SELECT 
    t.NAME AS TableName,
    s.Name AS SchemaName,
    p.rows AS RowCounts,
    SUM(a.total_pages) * 8 AS TotalSpaceKB, 
    CAST(ROUND(((SUM(a.total_pages) * 8) / 1024.00), 2) AS NUMERIC(36, 2)) AS TotalSpaceMB,
    SUM(a.used_pages) * 8 AS UsedSpaceKB, 
    CAST(ROUND(((SUM(a.used_pages) * 8) / 1024.00), 2) AS NUMERIC(36, 2)) AS UsedSpaceMB, 
    (SUM(a.total_pages) - SUM(a.used_pages)) * 8 AS UnusedSpaceKB,
    CAST(ROUND(((SUM(a.total_pages) - SUM(a.used_pages)) * 8) / 1024.00, 2) AS NUMERIC(36, 2)) AS UnusedSpaceMB
FROM 
    sys.tables t
INNER JOIN      
    sys.indexes i ON t.OBJECT_ID = i.object_id
INNER JOIN 
    sys.partitions p ON i.object_id = p.OBJECT_ID AND i.index_id = p.index_id
INNER JOIN 
    sys.allocation_units a ON p.partition_id = a.container_id
LEFT OUTER JOIN 
    sys.schemas s ON t.schema_id = s.schema_id
WHERE 
    t.NAME NOT LIKE 'dt%' 
    AND t.is_ms_shipped = 0
    AND i.OBJECT_ID > 255 
GROUP BY 
    t.Name, s.Name, p.Rows
ORDER BY 
    t.Name