How to get size of all tables in database

Here is how you can get table sizes via SQL query, this works from SQL 2005 and above

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

Alternatively if you want to get size of one table you can do it by using sp_spaceused, this can get you information on the disk space used by a table, indexed view, or the whole database.

USE psdb  
GO

EXEC sp_spaceused contact
GO

You can use the sp_spaceused command to get all tables in database by using the below command.

USE psdb  
GO

sp_msforeachtable 'EXEC sp_spaceused [?]' 
GO

Hope this useful

How to Get First and Last Day of a Year from SQL

Here is how we get first day and last day of the year.

DECLARE @Year int 
set @Year = 2018
select DATEADD(year,0,DATEADD(year,@Year-1900,0)) 
/*First Day of the year*/
select DATEADD(day,-1,DATEADD(year,1,DATEADD(year,@Year-1900,0))) 
/*Last Day of the year*/

We can also get Year dynamically from SQL by passing current date. This works form SQL 2005 and above.

SELECT Year(getdate())