How to find out all the statistics from all the tables and drop them..any script anyone can help with?
When we are trying to make datatype changes in few related tables,it's giving error saying that some statistics are dependent onthe column blah blah...
Thanks,
Sheila.
I need to know definitively when I need to drop and recreate column statistics (histogram) when altering a column. Empirically, it seems I can lengthen a varchar or change a not null column to a nullable one, and then existing statistics dont' cause
Msg 5074, Level 16, State 1, Line 1
The statistics 'c1' is dependent on column 'c1'.
Msg 4922, Level 16, State 9, Line 1
ALTER TABLE ALTER COLUMN c1 failed because one or more objects access this column.
But, if I change a column to not nullable or shorten a column, I get the error.
Is this the complete description of when I need to drop and recreate column statistics and when I don't?
My question: Is it okay to drop all the auto generated column statistics? (for the following scenario)
- I am cleaning up unnecessary objects (tables, unused indexes, overlapping statistics etc) from databases and found out there are more than 1400 auto generated column statistics on one database (lets call it A).
- Database A was used to be our reporting database but from last several years we are using database B for reporting. DB A has all the historical data while DB B only has valid records.
- We are updating all the column statistics with full scan nightly on database A and it is talking almost 2.5 hours to do that. Now I want to drop all the "unnecessary" statistics those were created when DB A was reporting database and they are no longer in use. There is no way to know the creation date of the column statistics that I know of. Statistics "last update date" is of no use because of our nightly job. So I was thinking of dropping all the auto generated column statistics and let the sql server create as it needs from now.
Hi,I found this SQL in the news group to drop indexs in a table. I need ascript that will drop all indexes in all user tables of a givendatabase:DECLARE @indexName NVARCHAR(128)DECLARE @dropIndexSql NVARCHAR(4000)DECLARE tableIndexes CURSOR FORSELECT name FROM sysindexesWHERE id = OBJECT_ID(N'F_BI_Registration_Tracking_Summary')AND indid 0AND indid < 255AND INDEXPROPERTY(id, name, 'IsStatistics') = 0OPEN tableIndexesFETCH NEXT FROM tableIndexes INTO @indexNameWHILE @@fetch_status = 0BEGINSET @dropIndexSql = N' DROP INDEXF_BI_Registration_Tracking_Summary.' + @indexNameEXEC sp_executesql @dropIndexSqlFETCH NEXT FROM tableIndexes INTO @indexNameENDCLOSE tableIndexesDEALLOCATE tableIndexesTIARob
View 2 Replies View RelatedHi folks.
Here i have small problem in transactions.I don't know how it is happaning.
Up to my knowldge if you start a transaction in side the transaction if you have DML statements
Those statements only will be effected by rollback or commit but in MS SQL SERVER 7.0 and 6.5
It is rolling back all the commands including DDL witch it shouldn't please let me know on that
If any one can help this please tell me ...........Please............
For Example
begin transaction t1
create table t1
drop table t2
then execute bellow statements
select * from t1
this query gives you table with out data
select * from t2
you will recieve an error that there is no object
but if you rollback
T1 willn't be there in the database
droped table t2 will come back please explain how it can happand.....................
Email Address:
myself@ramkistuff.8m.com
Hello List,
I would like to know, How can I drop Statistics from tables. My user tables has two indexes and and some statistics created onto them. I would like to drop the statistics indexes and apprecaite, If someone please advice.
The statistics indexes looks something like this:
"_WA_Sys_status_01EAB64E"
Any help would be apprecaited.
Thanks,
I have recently defragged my SQL server using INDEXDEFRAG. Can somebody please tell me how to update the statistics on all the tables? Thanks in advance.
Below is the script that I executed to defrag all the tables in my database if anyone needs this.
/*Perform a 'USE <database name>' to select the database in which to run the script.*/
-- Declare variables
SET NOCOUNT ON
DECLARE @tablename VARCHAR (128)
DECLARE @execstr VARCHAR (255)
DECLARE @objectid INT
DECLARE @indexid INT
DECLARE @frag DECIMAL
DECLARE @maxfrag DECIMAL
-- Decide on the maximum fragmentation to allow
SELECT @maxfrag = 20.0
-- Declare cursor
DECLARE tables CURSOR FOR
SELECT TABLE_NAME
FROM INFORMATION_SCHEMA.TABLES
WHERE TABLE_TYPE = 'BASE TABLE'
-- Create the table
CREATE TABLE #fraglist (
ObjectName CHAR (255),
ObjectId INT,
IndexName CHAR (255),
IndexId INT,
Lvl INT,
CountPages INT,
CountRows INT,
MinRecSize INT,
MaxRecSize INT,
AvgRecSize INT,
ForRecCount INT,
Extents INT,
ExtentSwitches INT,
AvgFreeBytes INT,
AvgPageDensity INT,
ScanDensity DECIMAL,
BestCount INT,
ActualCount INT,
LogicalFrag DECIMAL,
ExtentFrag DECIMAL)
-- Open the cursor
OPEN tables
-- Loop through all the tables in the database
FETCH NEXT
FROM tables
INTO @tablename
WHILE @@FETCH_STATUS = 0
BEGIN
-- Do the showcontig of all indexes of the table
INSERT INTO #fraglist
EXEC ('DBCC SHOWCONTIG (''' + @tablename + ''')
WITH FAST, TABLERESULTS, ALL_INDEXES, NO_INFOMSGS')
FETCH NEXT
FROM tables
INTO @tablename
END
-- Close and deallocate the cursor
CLOSE tables
DEALLOCATE tables
-- Declare cursor for list of indexes to be defragged
DECLARE indexes CURSOR FOR
SELECT ObjectName, ObjectId, IndexId, LogicalFrag
FROM #fraglist
WHERE LogicalFrag >= @maxfrag
AND INDEXPROPERTY (ObjectId, IndexName, 'IndexDepth') > 0
-- Open the cursor
OPEN indexes
-- loop through the indexes
FETCH NEXT
FROM indexes
INTO @tablename, @objectid, @indexid, @frag
WHILE @@FETCH_STATUS = 0
BEGIN
PRINT 'Executing DBCC INDEXDEFRAG (0, ' + RTRIM(@tablename) + ',
' + RTRIM(@indexid) + ') - fragmentation currently '
+ RTRIM(CONVERT(varchar(15),@frag)) + '%'
SELECT @execstr = 'DBCC INDEXDEFRAG (0, ' + RTRIM(@objectid) + ',
' + RTRIM(@indexid) + ')'
EXEC (@execstr)
FETCH NEXT
FROM indexes
INTO @tablename, @objectid, @indexid, @frag
END
-- Close and deallocate the cursor
CLOSE indexes
DEALLOCATE indexes
-- Delete the temporary table
DROP TABLE #fraglist
GO
statistics in sql server. how to create it and update it on tables.?
View 9 Replies View RelatedHi,
I have founde such a nice code to create statements for dropping all statistics in a database.
DECLARE @tblname sysname, @statname sysname, @sql nvarchar(2000)
DECLARE c CURSOR FOR
SELECT object_name(id), name FROM sysindexes WHERE INDEXPROPERTY(id, name, 'IsStatistics') = 1
OPEN c
FETCH NEXT FROM c INTO @tblname, @statname
WHILE @@FETCH_STATUS = 0
BEGIN
SET @sql = 'DROP STATISTICS [' + @tblname + '].[' + @statname + ']'
PRINT @sql
FETCH NEXT FROM c INTO @tblname, @statname
END
CLOSE c
DEALLOCATE c
Please help me with changing this code to take care only on indexes from my own tables (no system ones).
Thanks for your help.
Przemo
Does anyone have a script that can drop the Identity columns from all the tables in a database? Thanks
View 1 Replies View RelatedI have SQL SERVER 2005 with SP2 on windows XP professional.
When I execute DROP PROCEDURE manually,it works.
However when I execute inside a loop made using static cursors,
it generates following error
"Could not find server 'drop procedure dbo' in sysservers. Execute sp_addlinkedserver to add the server to sysservers."
OR it gives this error "Could not find stored procedure"
any idea???
I tried all the INFORMATION_SCHEMA on SQL 2000 andI see that the system tables hold pretty much everything I aminterested in: Objects names (columns, functions, stored procedures, ...)stored procedure statements in syscomments table.My questions are:If you script your whole database everything you end up havingin the text sql scripts, are those also located in the system tables?That means i could simply read those system tables to get any informationI would normally look in the sql script files?Can i quickly generate a SQL statement of all the indexes on my database?I read many places that Microsoftsays not to modify anything in those tables and not query them since theirstructure might change in future SQL versions.Is it safe to use and rely the system tables?I basically want to do at least fetching of information i want from thesystem tables rather than the SQL script files.I also want to know if it's pretty safe for me to make changes in thesetables.Can i rename an object name for example an Index name, a Stored Procedurename?Can i add a new column in the syscolumns table for a user table?Thank you
View 4 Replies View RelatedI'm working on databases where statistics of some indexes (tables) are changing too frequently. Once I update them manually, one minute after they get 10-20% change, and five minutes after they get over 100% change. Tables get updated very frequently (multiple times in a second).
When I run a query to read from sys.stats, sys.dm_db_stats_properties and other dynamic views, I see that they were last updated when I did it manually, but the change rate overpassed the 500+20% (tables have multiples of 10K rows). Auto create and update statistics are set to true on all databases, and I don't know why sql server does not do that automatically.
If I rebuild some indexes that are above 30% of average fragmentation, should I after that update statistics?
Also, How can I see if I Need to update statistics^on the tables of my database?
Hello group.I have an issue, which has bothered me for a while now:I'm wondering why the column statistics, which SQL Server wants me tocreate, if I turn off auto-created statistics, are so important to theoptimizer?Example: from Northwind (with auto create stats off), I do the following:SELECT * FROM Customers WHERE Country = 'Sweden'My query plan show a clustered index scan, which is expected - no indexexists for Country. BUT, the query plan also shows, that the optimizer ismissing a statistic on Country, which tells me, that the optimizer wouldbenefit from knowing this.I cannot see why? (and I've been trying for a while now).If I create the missing statistics, nothing happens in the query plan (andwhy should it?). I could understand it, if the optimizer suggested an indexon Country - this would make sense, but if creating the missing index, queryanalyzer creates the statistics with an empty index, which seems to me to beless than usable.I've been thinking long and hard about this, but haven't been able to reacha conclusion :) It has some relevance to my work, because allowing theoptimizer to create missing statistics limits my options for designingindexes (e.g. covering) for some rather wide tables, so I'm thinking why notturn it off altogether. But I would like to know the consequences - hopesomebody has already delved into this, and knows a good explanation.RgdsJesper
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Currently I get mostly 0īs, but if I try and *** up a query on purpose I can get
it up to around 30... Is it milliseconds or som made up number based on clockcycles or... ?
I would also like to know if itīs possible to change the precision.
- Nikolaj
Hi,
Is thr any query to drop around 20 tables at a time????
or shud i need to drop them individually one at a time???
what is the sql query to drop all tables in a database in sql server 2000
View 5 Replies View RelatedHi,
I want to write a script that will drop all tables in a database that begin with BACKUP.
Is there an easy way of doing this?
Thanks
Phil
I have a list of 35 tables that need to drop the primary key index from in my database.
My problem is as follows for these 35 tables:
1. How can I get a list of all the primary keys for this subset of tables in my database
2. How can I drop just the PK for each of these tables?
I want an easy quick way to do this without having to manually do this for each of the 35 tables in my database. I dont want to do this for all tables just the subset.
Thanks
I need to drop multiple tables in an SP... all the tables starts with a string that I can use... please suggest me the best way to drop all these tables in an SP that has more than just this.. Thanks!
View 2 Replies View RelatedI need to create a file that removes (drops) all of your database objects.
View 12 Replies View RelatedHello all, im using visual web developer btw. Im using the excellent tutorial here at http://www.asp.net/learn/videos/view.aspx?tabid=63&id=49 Works a treat. For my catalogue/database. i have 2 tables using the drop down menu - one is a "Buyers guide" (a list of the product) and an "application list" (this one is a list of the motorbike).
So in essence they are the same tables, but of course moved around with slightly different ways. What i would like to, is to some how make a refferenced link to each - Once one of the drop down menus has been linked to a product, theres a column that tells u what bike is being used....i therefore want to have a link so the seconmdary drop down menu - but i do not know how i can do this. Any ideas guys/gals? thx.
When I am initializing a transactional replication from SQL 2005 to Oracle 10g, SQL tries to drop tables that don't exist. The properties option for the articles specifically states "if the name is in use:". The name is not in use, yet SQL still tries to drop non-existent tables, which causes the replication to halt. Anyone seen this before, or have any ideas what to do about it?
Thanks!
I have two tables that will not drop in a Database. I'm running SQL 6.5 on a Compaq Proliant.
Symptoms: Both tables show up in sysobjects, sysindexes, and syscolumns. Both allow SELECT, sp_rename, and truncate, but just hang ISQL or the Enterprise Manager when I try to drop them. I ran a DBCC CheckTable on them with no errors reported. Any ideas??
SQL SERVER 2000System let's you alter the system tables and add indexes. However, it won'tlet you drop the index afterward.Anybody know how to drop an index on a system table?Thanks,Kevin
View 4 Replies View RelatedI have 1000's of tables. Some are of the form dbo.VT_2006-10-12. I'd like to drop all tables with the "VT" in the table name. How is the best done?
View 6 Replies View RelatedI have a package that i want to move between enviroments. Therefor i need to create a package that creates all my tables on the new server.
like
-- "if exists (select * from dbo.sysobjects where id = object_id(N'[table]') and OBJECTPROPERTY(id, N'IsUserTable') = 1)
drop table [table]
GO"
The case is that i have around 30 tables, and my question is therefore
I know that you can create the drop and create script for one table at the time in the SQL Server Management Studio, but is there an easier way to do this
Hello,
I have a query that's in development that uses several temp tables. In order to test the query repeatedly while it's being written I have the following code at the beginning to discard the temp tables. This allows the query can recreate the temp tables when called in the code.
if object_id('tempdb..#temp1') is not null drop table #temp1
if object_id('tempdb..#temp2') is not null drop table #temp2
if object_id('tempdb..#temp3') is not null drop table #temp3
if object_id('tempdb..#temp4') is not null drop table #temp4
if object_id('tempdb..#temp5') is not null drop table #temp5
Even though this works, it takes multiple lines of code. One of my queries has to drop 12 temp tables, thus 12 lines of code. I have been experimenting with looping the above as follows:
declare @n as nvarchar(3), @table as nvarchar(10)
set @n = 1
while @n <= 5 begin
set @table = '#temp'+@n
if object_id('tempdb..#temp'+@n) is not null drop table @table
set @n = @n + 1
end
Unfortunately, the above does not work. It gives this error message:
Server: Msg 170, Level 15, State 1, Line 5
Line 5: Incorrect syntax near '@table'.
I have also tried:
declare @n as nvarchar(3), @dropstmt as nvarchar(25)
set @n = 1
while @n <= 5 begin
set @dropstmt = 'drop table #temp'+@n
if object_id('tempdb..#temp'+@n) is not null @dropstmt
set @n = @n + 1
end
This does not work either. It gives this error message:
Server: Msg 170, Level 15, State 1, Line 5
Line 5: Incorrect syntax near '@dropstmt'.
Does anyone know how to get this to work?
Thanks.
I used code below to drop one temporary table. How to make code to drop all temporary tables?
IF OBJECT_ID('tempdb..#Temp') IS NOT NULL
BEGIN
DROP TABLE #Temp
END
Greetings
I am thinking of creating a script that generates another script for creating/dropping tables, indeces, FK, views, stored procedures..etc in the right order in a specific database. I accept the fact this script is dangerous (like if I ran it on production server). But it sure will be very helpful when moving our SQL objects from development to qa and then to production. Is this worth it? Haev you see anything that generates such a thing?
Thanks
Just a quicky about temporarary tables. If using QA, when you create atemporary table, it gets dropped if you close the query. Otherwise youneed to state 'DROP TABLE myTable' so that you can re-run the querywithout the table being there.Sometimes, you can have quite lengthy SQL statements (in a series)with various drop table sections throughout the query. Ideally youwould put these all at the end, but sometimes you will need to dropsome part way through (for ease of reading and max temp tables etc...)However, what I was wondering is :Is there any way to quickly drop the temporary tables for the currentconnection without specifying all of the tables individually ? Whentesting/checking, you have to work your way through and run each droptable section individually. This can be time consuming, so beingnaturally lazy, is there a quick way of doing this ? When workingthrough the SQL, it's possible to do this quite a lot.ExampleSQL Statement with several parts, each uses a series of temporarytables to create a result set. At the end of a section, these worktables are no longer needed, so drop table commands are used. Thefinal result set brings back the combined results from each sectionand then drops those at the end.TIARyan
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