code 128 check digit c# Creating a utility database in C#.NET

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Listing 2 Creating a utility database
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IF DB_ID(N'AB_Utility') IS NULL CREATE DATABASE AB_Utility; GO USE AB_Utility; GO IF OBJECT_ID(N'dbo.AB_GetThreePartName', N'FN') IS NOT NULL DROP FUNCTION dbo.AB_GetThreePartName; GO CREATE FUNCTION dbo.AB_GetThreePartName ( @object_id INT, @database_id INT ) RETURNS NVARCHAR(1000) AS BEGIN RETURN (QUOTENAME(DB_NAME(@database_id)) + '.' + QUOTENAME(OBJECT_SCHEMA_NAME(@object_id, @database_id)) + '.' + QUOTENAME(OBJECT_NAME(@object_id, @database_id))); END GO IF OBJECT_ID(N'dbo.AB_GetTwoPartName', N'FN') IS NOT NULL DROP FUNCTION dbo.AB_GetTwoPartName; GO CREATE FUNCTION dbo.AB_GetTwoPartName ( @object_id INT, @database_id INT )
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Setting up a utility database
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RETURNS NVARCHAR(1000) AS BEGIN RETURN (QUOTENAME(OBJECT_SCHEMA_NAME(@object_id, @database_id)) + '.' + QUOTENAME(OBJECT_NAME(@object_id, @database_id))); END GO IF OBJECT_ID(N'dbo.AB_Uptime', N'IF') IS NOT NULL DROP FUNCTION dbo.AB_Uptime; GO /* -- you should uncomment one of these functions -- depending on the version of your instance:
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-- SQL Server 2008 : CREATE FUNCTION dbo.AB_Uptime() RETURNS TABLE AS RETURN ( SELECT sqlserver_start_time, uptime = DATEDIFF(MINUTE, sqlserver_start_time, CURRENT_TIMESTAMP) FROM sys.dm_os_sys_info ); -- SQL Server 2005: CREATE FUNCTION dbo.AB_Uptime() RETURNS TABLE AS RETURN ( SELECT sqlserver_start_time = create_date, uptime = DATEDIFF(MINUTE, create_date, CURRENT_TIMESTAMP) FROM sys.databases WHERE name = 'tempdb' ); */ IF OBJECT_ID(N'dbo.AB_ParseSQLText', N'FN') IS NOT NULL DROP FUNCTION dbo.AB_ParseSQLText; GO CREATE FUNCTION dbo.AB_ParseSQLText ( @text NVARCHAR(MAX), @start INT, @end INT ) RETURNS NVARCHAR(MAX) AS BEGIN
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RETURN ( SELECT COALESCE ( SUBSTRING ( @text, @start / 2 + 1, (CASE WHEN @end = -1 THEN (DATALENGTH(@text)) ELSE @end END - @start)/2 + 1 ), N'' ) ); END GO
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Now that I have my underlying utility functions set up, I can get on with generating some interesting code for you to use on your own systems.
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In this section, I ll show you a number of ways you can use the DMVs I ve covered above, beginning with a more refined version of sp_who.
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A more refined sp_who or sp_who2
We ve all used sp_who or sp_who2 at some point; however, I often find myself digging deeper and handcrafting queries myself, either to obtain more information than the procedures provide, or to whittle down the rows. This way, I can focus on the most important activity at the time. Both sp_who and sp_who2 provide a parameter @loginame, which enables you to pull activity for a specific session_id, or for a specific login, or for all active queries (those that are not sleeping, awaiting command, lazy writer, or checkpoint sleep). But I often want to search on other parameters (such as database name or a pattern match on the command) or limit the result set to only those sessions that are blocking or being blocked. The following procedure is a bit lengthy, and tries for the most part to mimic sp_who and sp_who2, but hopefully the code (and the sample calls that follow) will give you some ideas about how to write your own enhanced routines that allow you to dig into an issue without having to try too hard. An example of this is shown in listing 3.
Listing 3 An sp_who2 replacement
USE AB_Utility; GO IF OBJECT_ID(N'dbo.AB_who', 'P') IS NOT NULL DROP PROCEDURE dbo.AB_who; GO CREATE PROCEDURE [dbo].[AB_who]
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@loginame @ShowBlockersOnly @ShowSystemSpids @SearchDBName @SearchHostName @SearchCommand AS BEGIN SET NOCOUNT ON; WITH list AS ( SELECT SPID = s.session_id, BlockedBy = NULLIF(r.blocking_session_id, 0), [database] = DB_NAME(COALESCE(r.database_id, sp.[dbid])), [host_name] = COALESCE(s.[host_name], ''), ip_address = COALESCE(c.client_net_address, ''), [program_name] = COALESCE(s.[program_name], ''), login_name = COALESCE(UPPER(s.login_name), ''), [status] = UPPER(COALESCE(r.[status], s.[status])), command = UPPER(COALESCE(r.command, '')), logical_reads = COALESCE(r.logical_reads, s.logical_reads), num_reads = COALESCE(r.reads, c.num_reads), num_writes = COALESCE(r.writes, c.num_writes), cpu_time = COALESCE(r.cpu_time, s.total_scheduled_time), row_count = COALESCE(r.row_count, s.row_count), memory_in_pages = COALESCE(r.granted_query_memory, s.memory_usage), s.login_time, last_request_start_time = COALESCE( r.start_time, s.last_request_start_time), request_active = CASE WHEN UPPER(s.[status]) IN ('SLEEPING', 'BACKGROUND') THEN 0 ELSE 1 END, wait_type = COALESCE(r.wait_type, r.last_wait_type, ''), exec_sql = CASE WHEN qs.[sql_handle] IS NULL THEN COALESCE(est.[text], '') ELSE '' END, exec_object = COALESCE(AB_Utility.dbo.AB_GetThreePartName( est.objectid, est.[dbid]), ''), exec_statement = AB_Utility.dbo.AB_ParseSQLText(est.[text], qs.statement_start_offset, qs.statement_end_offset) FROM sys.dm_exec_sessions AS s LEFT OUTER JOIN sys.sysprocesses AS sp ON s.session_id = sp.spid LEFT OUTER JOIN sys.dm_exec_requests AS r SYSNAME = NULL, BIT = 0, BIT = 0, NVARCHAR(255) = N'%', VARCHAR(255) = N'%', NVARCHAR(255) = N'%'
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