Does null column take storage in table ? I created the following table:
drop table [dbo].[TBL_orig]
CREATE TABLE [dbo].[TBL_orig](
[1] [bigint] NOT NULL,
[2] [bigint] NULL,
[3] [bigint] NULL,
[4] [bigint] NULL,
[5] [float] NULL,
[Code] ....
Does null value will take a place even no data insert to this columns and if yes this answer is 4 mb is logical gap ?
We have a table with 10 columns each column is of datatype int and can accept nulls, when I do a save is it better to have 0 inserted in to the column or just insert null?
View 9 Replies View RelatedImpact on performance of changing Text column size.
However, many of them were regarding older releases of SQL Server.
Does the architecture in 2012, 2014 releases make this less of an issue ?
In other words, why bother going from Varchar(1000) to Varchar(50) ?
I'm just thinking maybe there is column compression automatically now.
I receive this message when I try to run any report. The reportserver and reportservertempdb databases were upgraded using backup/restore from SQL2000 to SQL2005 on a separate server which is running RS2005 . Please help. Thanks
View 1 Replies View RelatedI have a table like below,
CREATE TABLE Student
(
Id BIGINT not null
,Name NCHAR(20) not Null
,Branch NVARCHAR (64) null
)
The table contains : 100000 rows .
Getting details of below
1)Number of rows in a data page
2)Total number of pages required for the table
3)Total Table size in KB or MB
4)Total file size in Kb or MB
How do I add column names as Total and SubTotal for NULL values.
SELECT DISTINCT
--[Group]
[Month]
,[Market]
,[Environment]
,[type]
, COUNT(*)
[code]....
I have a table that contains 1.6 million rows, and is about 2.6GB in size.One of the columns is ntext and contained some xml.Realistically, I don't need the xml for anything older than about 2 months, however, i'd like to keep some of the data in the other fields.I decided that if I updated the xml to blank, I would see some considerable space savings, however that doesn't appear to be the case.This is the output of sp_spaceused for my table
name rows reserved data index unused
CommitmentsForPosting1660979 2740336 KB 1857104 KB312 KB882920 KB
After I updated the table to remove the xml, the output of sp_spaceused remained the same.My first thought was that it was probably statistics, so I updated statistics for the table, and nothing changed.I then updated statistics for everything in the database, still no change.I then ran DBCC CLEANTABLE for that table. I didn't really expect it to make a difference, and no surprise, it didn't.
The index on the table is a clustered index on just a GUID column.I rebuilt the index and again it still made no difference (that's a bit of a lie - index_size changed by a few hundred KB)my next test was to run 'select * into XXX from YYY' to create a copy of this table with the same data and data types. I also created the same clustered index from the original table onto the new one.If I then run sp_spaceused on this new copy of the table, I see what I expect to see in sp_spaceused - a table using approximately 256MB of space
name rows reserved data index unused
SPS_TEST 1660979 266400 KB 266400 KB 304 KB56 KB
To be honest, this isn't hugely critical, but I'm just curious as to why the original table is still reporting 2.6GB size, when I think it should probably be nearer 256MB.
I would like to get the size of the tables in my database BUT as follows:
SIZE OF (SELECT * FROM myTable WHERE Section = 1)
...what is the fastest way to do it?
Script to do the table partitioning for a 500gb in sliding window technique?
View 9 Replies View RelatedI'm new to mssql.
I need to change the size of a column of a table from char(255) to char(500). I used the line:
alter table table_name alter column column_name char(500)
When I run that command, I get a message that it was sucessful. However, when I try to enter data into the changed column, the number of characters I can enter is still 255. I check the information schema for the column and the 'character_maximum_length' field is 500.
What is the problem here? Is the maximum allowable length for char 255? How can I get a column to have 500 characters?
Is there any way to get size of the individual column in a table?
I know we can use sp_spaceused to get the size of the table. But my question is diiferent. I have a table with 50 columns and approx 2 million rows in it. I wanted to know which column is taking most of the space.
Thanks
I have deleted nearly 30 million rows from a table. But however when I used the sp_spaceused command to calculate the data occupied by the table I don't see any difference in the data size of the table. In fact the data has increased to few MBs after the deletion, but not much.
View 8 Replies View RelatedI got a sales cost and cost amount table for my budget. the sales cost table is getting updated with FOBB items which makes the total incorrect . the FOBB values needs to be moved from the sales cost column to the cost amount column. how can i do it with an SQL script.
View 1 Replies View RelatedA column of a table has values in the format - 35106;#Grandbouche-Cropp, Amy.
I need to format the column data in such a way that only the text after # (Grandbouche-Cropp, Amy) remain in the column.
The text before ;# (35106) should be inserted in to another column of the same table.
Below is the table structure:
create table [HR_DEV_DM].[CFQ_TEST].sp_CFQ_Commercial_Referrals
(
ID int identity,
PromotionalCode nvarchar(4000),
QuoteNumber nvarchar(100),
CreatedBy nvarchar(100),
Created datetime,
ModifiedBy nvarchar(100),
Modified datetime,
CreatedBy_SalesRepSharePointID int,
ModifiedBy_ModBySharePointID int
)
Hi,
I'm merge replicating a SQL Server 2005 database (publisher) to SQL Compact databases (subscribers) on mobile devices. I understood that I could add a "not null" column to a replicated table on the server as long as I specified a default value, but it seems this is not possible. I ran the following script on the server database:
ALTER TABLE Activity ADD ActivityRequiresProject bit not null default(0)
which executed OK. When I went to synchronize the db on the mobile device I got the following error:
Alter table only allows columns to be added which can contain null values. The column cannot be added to the table because it does not allow null values.
The SQL statement failed to execute. If this occurred while using merge replication, this is an internal error. If this occurred while using RDA, then the SQL statement is invalid either on the PULL statement or on the SubmitSQL statement. [ SQL statement = alter table "Activity" add "ActivityRequiresProject" bit not NULL constraint "DF__Activity__Activi__4A47DDAE" default ( ( 0 ) ) ]
Does anyone know if this is a valid error? Is is possible to add a not null column with default, and if not how do I update the schema on a replicated database?
Regards,
Greg
We have a requirement to add a not null column to an existing table.
I created the column with null and updated with single quotes, and then converted the column into not null.
Now, I can see in the publisher, it went fine. but in the subscribers, i'm getting the error as, can not insert null value. I then tried to make column as null to resolve the issue, but still it is holding the same error and not proceeding further.
Now I even dropped the column. still same issue. how can I resolve this issue? I'm using sql server 2008 R2 with SP3. replication type is Merge replication.
What causes SQL Server 2000 to create tables with default column sizes of 8000 for a varchar datatype??
I would assume this can cause significant performance problems.
(see attached)
I am able to get reports going with tables sized properly. They look fine on the ReportServer website and I adjust the column widths so that the headings and data look nice. When I set up a subscription to be delivered by "Report Server E-Mail," though, the table formattings get completely distorted.
In particular, I have two tables, with some column headers being two short words (e.g. Max Height). When rendering on the site, I adjust the columns so the full column header is visible on one line. When I receive the email and read it in Outlook, the header row is now about twice as tall and everything is scrunched together. Both the headings and the data in the fields do not format the same as on the website.
The two tables tend to actually have the exact same width in the email version, although occasionally they are a little different (in the web version one is about half as wide as the other). I have tried just making the columns bigger and that has not worked. I've tried making the font sizes smaller, which didn't work. If I do that, leaving the columns the same width, the email version just gets scrunched into a smaller area with the same text-wrapping problems.
If I open the email in a browser (in a web mail interface) the report renders perfectly as on the site.
I have almost all the default settings, and haven't been messing around with page sizes and things like this (except after, to see if that would fix the problem).
Any ideas, similar experiences, or suggestions? If there is a book I should read or any reference you could point me to in order to figure this out would be helpful. I haven't been able to understand this either using web searches or the two SQL reporting services books I have.
I'm new to replication and am trying to determine the best approach to add a column (NOT NULL with no DEFAULT) to a replicated table. The only success I have had is if I do the following:
Delete entire Subscription
Delete entire Publication
Add column to table
Create new Publication
Create new Subscription
Run SnapShot
The problem with this approach is that each step affects the entire database and not just the modified table. I think it is inefficient to redo replication for a simple object change. What am I missing? Is there a way to only replicate the changes made to the one table without having to run a SnapShot for the entire publication?
Keep in mind the column must be defined as NOT NULL and cannot have a Default.
Thanks, Dave
I am trying to drop the "allow nulls" characteristics on an existing table
column. I know that there are not Nulls currently in this column, nor will
there ever be. How do I get rid of that "allow nulls" checkmark on an
existing table structure? Thanks, Craig.
I have a table with hundreds of millions of records and need to update an xml column to null. I do something like this:
UPDATE [Mydb].[MySchema].[MyTable]
SET [XMLColumn] = null
Currently it is taking around 6 hours.
Is there a quicker way to do this?
hello, i'm using sql200 and i am attempting to create a table that has an hourly-incrementing 'Date_Time' column, with a corresponding 'Total' column (which keeps a running total of values off of another table) . The code I am using right now is...
declare @date as smalldatetime
set @date = dateadd(yy, -1, cast(convert(char(11), current_timestamp, 101) + '00:00:00' as smalldatetime))
select dateadd(hh, i, @date) as Date_Time, sum(Subtotal) as Total
into #POGtable
from Pivot, OrderGroup
where
i between 0 and 24 and
CreationDate between @date and dateadd(hh, i, @date)
group by i
select dateadd(hh, i, @date) as Date_Time, 0 as Total
into #Ptable
from Pivot
where i between 0 and 24
group by i
select *
from #POGtable
union
select * from #Ptable p
where not exists(
select * from #POGtable pog
where p.Date_Time >= pog.Date_Time)
the solution is ugly, but the problem i'm having is that values for 'SubTotal' don't usually appear before 8 or 9 am. what you see above is me getting all the times (hours) that a subtotal present, creating another table with every possible hour in it (and with a 'Total' column as just zero), and then combining the two tables to create one flowing table over a 24-hour period.
there has GOT to be a better way to do this; the main point being that i want the sum( ) function to start adding up values immediately so i don't have to union two tables
Damn! SQLServer2000 can't add a NOT NULL COLUMN even in one emptyexisting table!That is, A is the existing table and it is emtpy, I want to add one NOTNULL COLUMN (col_new) to A using following T-SQL statement, then itwill fail.ALTER TABLE A ADDcol_new varchar(600) NOT NULLGOYou should change it to these statements in SQLServer2000:ALTER TABLE A ADDcol_new varchar(600) NULLALTER TABLE A ALTER COLUMN col_new varchar(600) NOT NULLGOah, ridiculous! right?Fortunately, this stupid behavior is changed in SQLServer2005. Thefirst T-SQL statements works.
View 1 Replies View RelatedI am trying to use a stored procedure to update a column in a sql table using the value from a variable table I getting errors because my syntax is not correct. I think table aliases are not allowed in UPDATE statements.
This is my statement:
UPDATE [dbo].[sessions_teams] stc
SET stc.[Talks] = fmt.found_talks_type
FROM @Find_Missing_Talks fmt
WHERE stc.sessionid IN (SELECT sessionid FROM @Find_Missing_Talks)
AND stc.coupleid IN (SELECT coupleid FROM @Find_Missing_Talks)
It is possible to find table size and in that table each row size.
View 4 Replies View Related
Hi,
I have a trigger set on TABLE1 so that any update to this column should set off trigger to write to the AUDIT log table, it works fine otherwise but not the very first time when table1 has null in the column. if i comment out
and i.req_fname <> d.req_fname from the where clause then it works fine the first time too. Seems like null value of the column is messing things up
Any thoughts?
Here is my t-sql
Insert into dbo.AUDIT (audit_req, audit_new_value, audit_field, audit_user)
select i.req_guid, i.req_fname, 'req_fname', IsNull(i.req_last_update_user,@default_user) as username from inserted i, deleted d
where i.req_guid = d.req_guid
and i.req_fname <> d.req_fname
Thanks,
leo
Is there any possibility to trace, most used column in every table on the SQL server?
The intention is, a query which suggests some columns to be indexed; Based on the usage of the column by the queries that run on server.
Here what I want to accomplish, I have table that has 15 column one of the columns is ClientID that is about max 45char. I want to be able to hash on the column and return the hash value in a new column call ClientID_Hash. Is this possible?
View 2 Replies View Relatedmy table payment_details structure is
payment_id payment_code
1 null
2 null
3 null
4 null
here payment_id is a primary key and i need to update the whole payment_id column to payment_code column.so i just tried the below query
update payment_details
set payment_code = payment_no
where payment_code is null
but it shows subquery error?
I am trying to extract what I believe is called a Node from a column in a table that contains XML. What's the best way to do this? It is pretty straightforward since I'm not even looking to include a WHERE clause.
What I have so far is:
SELECT CCH.OrderID, CCH.CCXML.query('/cc/auth')
FROM tblCCH AS CCH
Here are my scenarios:
We have an application with replicated environment setup on sql server 2012 . Users will have a replica on their machines and they will replicate to the master database. It has 3 subscriptions subscribed to the publications on the master db.
1) We set up a replica(which uses sql server 2012) on a machine with no sql server on it. After the initial synchronization(used replmerge tool) the mdf file has grown to 33gigs and ldf has grown to 41 gigs. I went to sql server management studion . Right click and checked the properties of the local database. over all size is around 84 gb with little empty free space available.
2) We set up a replica(which uses sql server 2012) on a machine with sql server 2008 on it. After the initial synchronization(used replmerge tool) the mdf file has grown to 49 gigs and ldf has grown to 41 gigs. I went to sql server management studio , Right click and checked the properties of the local database. over all size is around 90 gb with 16 gb free space available.
3) We set up a replica(which uses sql server 2012) on a machine with sql server 2012 on it. We have dropped the local database and recreated the local db and did the initial synchronization using replmerge tool. The mdf file has grown to 49 gigs and ldf has grown to 41 gigs. I went to sql server management studio , Right click and checked the properties of the local database. over all size is around 90 gb with 16 gb free space available.
Why it is allocating the space differently? This is effecting our initial replica set up times.
I am writing a query to update table variable. It is throwing me some error.
I have a table variable declared and inserted the data with three columns. I want to update col1 of that table variable when the second column of that table variable= one column from a physical table
update @MYtabvar set @Mytabvar.LatestDate=B.LatestDate from TableB B where @Mytabvar.id=B.ID
I convert EBCDIC file to text file at C:orderorder.txt. There are about 1400000 rows. The length of line is 1500.
How to insert entire line into one column of the table? (only one column, named as [LineDetail])