Checking For Existence Of A Temp Table Before Droping It
Dec 31, 2003
I'm familiar with how to check for the existence of a table before dropping it using the following command:
if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[xxx]') and OBJECTPROPERTY(id, N'IsUserTable') = 1)
drop table [dbo].[xxx]
How does one check for the existence of a temp table (using # syntax) before dropping it? I've tried various flavors of this command and none work. One flavor is
use tempdb
if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[#xxx]') and OBJECTPROPERTY(id, N'IsUserTable') = 1)
drop table [dbo].[#xxx]
CREATE TABLE #xxx (
NumID INTEGER IDENTITY(1,1),
Exhibitor_Id INTEGER NOT NULL,
Company_Id INTEGER NOT NULL
)
Thanks.
Nick
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Feb 22, 2005
Hi all,
While cleaning up some code, I ran across the following statement in a stored proc - the purpose of which is to determine if a table exists in the local database: SELECT * FROM dbo.sysobjects where id = object_id(N'[dbo].[XML_PRINTDATE]') and OBJECTPROPERTY(id, N'IsUserTable') = 1of course I removed it from the IF just for testing purposes, but my quandry is this...
Why chose that select (converting table name to object ID) rather than just doing THIS:SELECT * FROM dbo.sysobjects where name = N'XML_PRINTDATE' and OBJECTPROPERTY(id, N'IsUserTable') = 1
I first thought it was to gain access to the "id" column value (and that may yet be the purpose of it), but the second code seems to work just peachy (I assume because the id column is present in the sysobjects table itself).
A follow-on question is this:
When I try to do the same check from another server (i.e.SELECT * FROM APRECEIVE1.DailyProd.dbo.sysobjects where name = N'XML_PRINTDATE' and OBJECTPROPERTY(id, N'IsUserTable') = 1) it of course fails because OBJECTPROPERTY only looks for the id on the local database.
So, do I CARE if it is a user table? (I am reasonably sure it is, of course) and if so, is there a way to check on the remote server for the object type?
Bottom line is I Think I can just simplify things and check for the object name on the remote server, but just don't want to take away any "warm fuzzy feeling" generated by the original stored proc, if such a warm fuzzy is of any benefit (though don't get me started on the relativity of warm fuzzies, I wrote my Thesis on that ;) )
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Oct 4, 2007
Hi!
SS2005:
create table #tmp(a int)
create index idxt1 on #tmp(a)
insert into #tmp values (42)
select * from sys.indexes
where name like '%idx%'
order by name
But I can't see any rows about idxt1 :-(
If I say
create index idxt1 on #tmp(a)
againg I got error, because it exists.
How to check for existence using query?
B. D. Jensen
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Jun 13, 2006
This function, F_TEMP_TABLE_EXISTS, checks for the existence of a temp table (## name or # name), and returns a 1 if it exists, and returns a 0 if it doesn't exist.
The script creates the function and tests it. The expected test results are also included.
This was tested with SQL 2000 only.
if objectproperty(object_id('dbo.F_TEMP_TABLE_EXISTS'),'IsScalarFunction') = 1
begin drop function dbo.F_TEMP_TABLE_EXISTS end
go
create function dbo.F_TEMP_TABLE_EXISTS
( @temp_table_name sysname )
returns int
as
/*
Function: F_TEMP_TABLE_EXISTS
Checks for the existence of a temp table
(## name or # name), and returns a 1 if
it exists, and returns a 0 if it doesn't exist.
*/
begin
if exists (
select *
from
tempdb.dbo.sysobjects o
where
o.xtype in ('U')and
o.id = object_id( N'tempdb..'+@temp_table_name )
)
begin return 1 end
return 0
end
go
print 'Create temp tables for testing'
create table #temp (x int)
go
create table ##temp2 (x int)
go
print 'Test if temp tables exist'
select
[Table Exists] = dbo.F_TEMP_TABLE_EXISTS ( NM ),
[Table Name] = NM
from
(
select nm = '#temp' union all
select nm = '##temp2' union all
select nm = '##temp' union all
select nm = '#temp2'
) a
print 'Check if table #temp exists'
if dbo.F_TEMP_TABLE_EXISTS ( '#temp' ) = 1
print '#temp exists'
else
print '#temp does not exist'
print 'Check if table ##temp4 exists'
if dbo.F_TEMP_TABLE_EXISTS ( '##temp4' ) = 1
print '##temp4 exists'
else
print '##temp4 does not exist'
go
-- Drop temp tables used for testing,
-- after using function F_TEMP_TABLE_EXISTS
-- to check if they exist.
if dbo.F_TEMP_TABLE_EXISTS ( '#temp' ) = 1
begin
print 'drop table #temp'
drop table #temp
end
if dbo.F_TEMP_TABLE_EXISTS ( '##temp2' ) = 1
begin
print 'drop table ##temp2'
drop table ##temp2
end
Test Results:
Create temp tables for testing
Test if temp tables exist
Table Exists Table Name
------------ ----------
1 #temp
1 ##temp2
0 ##temp
0 #temp2
(4 row(s) affected)
Check if table #temp exists
#temp exists
Check if table ##temp4 exists
##temp4 does not exist
drop table #temp
drop table ##temp2
CODO ERGO SUM
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Nov 1, 2006
Can someone show me some C# code for detecting if a SQL row exists or not? This seems like a very typical action and I cannot for the life of me find a tutorial online that explains this step. In my code I'm either going to INSERT or UPDATE a record. I tried sending a SELECT command through a ExecuteNonQuery, but only got -1 as a response. Apparently ExecuteNonQuery does not work with SELECT. I then saw that T-SQL has an EXISTS keyword, but I cannot see anyway to use that from within C#.So...can anyone share the typical code they use to identify if a row exists or not within a database. I guess I was execting there to be some method available to do this sort of thing.
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May 14, 2008
So I want to check a directory for a particular extention of file. ex: *.txt, *.zip etc. (I'm using T-SQL by the way)
I tried this:
Code:
insert #a EXEC master..xp_fileexist 'G:wklyld_SQLRMAPOLLOADUntar*.txt'
this code works as long as I give it a specific file name, but if I try the *.txt or *.zip it wont work.
I've also been trying to run
Code:
EXEC MASTER.dbo.xp_cmdshell 'dir "G:wklyld_SQLRMAPOLLOADUntar*.*"
and then copy the results to a temp table and then run queries against the table. But I havent had much luck with that either.
Can anyone help? Thanks in advance.
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Aug 11, 2015
I have a situation where our stored procedure inserts records from table_1 to table_2 when they don't already exist (uses the EXIST statement) on that table. If table_1 contains multiple records that are the same, it appears after the 1st record has been inserted, it does not recognize it as being there when it checks the existence when attempting to insert record 2.
Here's an example of the script:
insert into table_2 (col1,col2,col3)
select col1,col2,col3
from table_1 t1
where not exists (select '1'
from table_2 t2
where t1.col1 = t2.col1
and t1.col2 = t2.col2
and t1.col3 = t2.col3)
Data from Table_1 -- Assume that table_2 does not contain these records
col1 col2 col3
AA 11 A1
AA 11 A1
BB 22 B2
All 3 records would be inserted to table_2 in this example.
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Aug 29, 2007
OK. Here's my situation. I check for the existence of a dummy .txt file using a script. I send an e-mail if it does not exist and exit package. The .txt file only exists if another .xls file is present which I import. However, during the validation phase of the package, the package fails because the .xls file does not exist. Is there a way to bypass the validation step? The only solution I came up with is to have a two-step job. The first runs the file check step and sends the e-mail. The second attemps to run the package and fails. Not a very graceful exit.
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Nov 14, 2007
Hi All,
Not played with SQL for a while and am a bit rusty so please excuse me if I sound like a demented idiot! )
It's for a data migration from something wierd to SQL, I just need to be able to advise whether a table is worth migrating or someone should manually enter the data (i.e. if only six random fields are populated in a table then get a secretary to enter it).
I was hoping someone might have already done this and have a query I can edit?!
As far as I can make out the query needs to loop through every table, loop through every row, check each field for an existance of data and output something useful.
I've stared at this for about 3 hours now and tried several different things and none work.....and it's doing my nut! (
Help!!
Regs
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Oct 16, 2007
I have a parent package that calls a child package, when I run the parent package the child package picks up a variable value from the parent in a script task and runs fine, the problem I'm facing is when I run just the child package, the script task fails because it doesn't know about the parent variable. The dilemma I'm facing is in my child script task, if I add the parent variable to the ReadOnlyVariables list then the task fails because the parent variable doesn't exist when I just run the child. If I don't add the parent variable to the ReadOnlyVariabls list then if I try to use it then the task fails saying that the variable doesn't exist in the variables collection.
Is there a way to check for the existence of the parent variable, so when I just run the child package I don't get an error and I don't have to change my task every time I choose to run the child package only vs running the parent/child?
Thanks.
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Apr 9, 2014
Below are my temp tables
--DROP TABLE #Base_Resource, #Resource, #Resource_Trans;
SELECT data.*
INTO #Base_Resource
FROM (
SELECT '11A','Samsung' UNION ALL
[Code] ....
I want to loop through the data from #Base_Resource and do the follwing logic.
1. get the Resourcekey from #Base_Resource and insert into #Resource table
2. Get the SCOPE_IDENTITY(),value and insert into to
#Resource_Trans table's column(StringId,value)
I am able to do this using while loop. Is there any way to avoid the while loop to make this work?
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Sep 24, 2007
Hi,
I have a table with the follwing values
Table Cats
{
CatID, date
-----------------------
Cat1, D1
Cat2, D2
Cat3, D3
}
I just wanted to check whether Cat1 exists in the table. Can anyone post the query
Thanks
~MOhan
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Jun 23, 2007
Dear All,
I wanted to know how do I know or check that whether a column exists in a table. What function or method should I use to find out that a column has already exists in a table.
When I run a T-SQL script which i have written does not work. Here is how I have written:
IF Object_ID('ColumnA') IS NOT NULL
ALTER TABLE [dbo].[Table1] DROP COLUMN [ColumnA]
GO
I badly need some help.
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May 8, 2006
Apologies if this has been answered before, but the "Search" function doesn't seem to be working on these forums the last couple of days.
I'd just like to check if a table already exists before dropping it so that I can avoid an error if it doesn't exist. Doing a web search, I've tried along the lines of
"If (object_id(sensor_stream) is not null) drop table sensor_stream"
and
"If exists (select * from sensor_stream) drop table sensor_stream"
In both of these cases I get the error: "There was an error parsing the query. [ Token line number = 1,Token line offset = 1,Token in error = if ]"
Sooooo... what is the standard way to check for existence of a table before dropping it? Someone help? This seems like it should be simple, but I can't figure it out.
Thanks in advance!
Dana
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Jun 5, 2007
Check the field existence of a database table, if exist get the type, size, decimal ..etc attributes
I need SP
SP
(
@Tablename varchar(30),
@Fieldname varchar(30),
@existance char(1) OUTPUT,
@field_type varchar(30) OUTPUT,
@field_size int OUTPUT,
@field_decimal int OUTPUT
)
as
/* Below check the existance of a @Fieldname in given @Tablename */
/* And set the OUTPUT variables */
Thanks
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Aug 10, 2015
I am using the following script to check existence of table in the Database and create it dynamically...
This is working when table not existed, it error-ed when the table existed...
This script i am using in the Exec Sql Task.....
[Execute SQL Task] Error: Executing the query "declare @ODSDB varchar(50)
declare @SQLSTMT varcha..." failed with the following error: "There is already an object named 'addressTable' in the database.". Possible failure reasons: Problems with the query, "ResultSet" property not set correctly, parameters not
set correctly, or connection not established correctly.
declare @ODSDB varchar(50)
declare @SQLSTMT varchar(max)
set @ODSDB = 'SampleDB'
begin
set @SQLSTMT = '
IF NOT EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(''' + @ODSDB + '.dbo.addressTable'') and Type=''U'')
[Code] ...........
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Mar 29, 2007
Hi
I am having a table called as status ,in that table one field is there i.e. currentstatus.
the rows which are having currentstatus as "ticket closed",i want to move those rows into other table called repository which is having same table structure as status table.
I can do programatically.
but is there any way for every 3 months system has to check and do this action means moving to repository table automatically?
Please help me.
Thanks.
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Jun 24, 1999
I think this is a very simple question, however, I don't know the
answer. What is the difference between a regular Temp table
and a Global Temp table? I need to create a temp table within
an sp that all users will use. I want the table recreated each
time someone accesses the sp, though, because some of the
same info may need to be inserted and I don't want any PK errors.
thanks!!
Toni Eibner
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Nov 30, 2005
I am having problem to find the right syntax to DROP a column with contrainst and recrate it
I get an error
if exists ( select * from INFORMATION_SCHEMA.COLUMNS
where TABLE_NAME='myTable'
and COLUMN_NAME='myDate' )
ALTER TABLE [dbo].[myTable] DROP COLUMN myDate
GO
ALTER TABLE [dbo].[myTable] WITH NOCHECK ADD
myDate datetime CONSTRAINT [DF_myDate] DEFAULT (GetDate())
GO
Query Analyser says :
Server: Msg 5074, Level 16, State 1, Line 5
The object 'DF_myDate' is dependent on column 'myDate'.
Server: Msg 4922, Level 16, State 1, Line 5
ALTER TABLE DROP COLUMN myDate failed because one or more objects access this column.
Server: Msg 2705, Level 16, State 4, Line 2
Column names in each table must be unique. Column name 'myDate' in table 'dbo.myTable' is specified more than once.
thank you for helping
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Jan 14, 2004
I have two transaction log files, one on C drive and other on D drive. I want to drop the file from that database that is on C drive. Can anyone help me out on this with complete syntax.
I have taken a down time of one and half hour to accomplish this task
Here is what think
Take a full database backup
Take transaction log backup
Shrinkfile using DBCC with truncateonly option
emptyfile using dbcc or drop file using alter database remove
thanks for your input guys
Rome
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Aug 23, 2005
Hi All,I am having a serious problem of removing and adding again an user in adatabase.Microsoft SQL Server 2000 - 8.00.760 (Intel X86)Dec 17 2002 14:22:05Copyright (c) 1988-2003 Microsoft CorporationEnterprise Edition on Windows NT 5.2 (Build 3790: Service PackSomehow, the user was created earlier but was not able to run queryassigned to him. As a result I wanted to drop and recreate the user.I have done many possible things to create the users again with thesame user id but failed.1. I tried to delete this user from the enterprsie manager security-->logins-->user1It deletes but when I try to add again, it gives me error message(Error 15023: user or role u'user1' already exist).2. Then I tried in the db:delete sysusers where name='user1'it deletes the user1.3. Again tried adding, got the message in 1.4. Then I trieduse db1EXEC sp_change_users_login 'Update_One', 'user1', 'user1'Server: Msg 15291, Level 16, State 1, Procedure sp_change_users_login,Line 88Terminating this procedure. The User name 'user1' is absent or invalid.I also tried master database and ran the following.EXEC sp_droplogin 'user1'The login 'user1' does not exist.But If I try to add the login user1, get the error message.Error 15023: user or role u'user1' already existI also ran the following when I got Ad hoc error messageexecute sp_configure "allow updates",1goreconfigure with overridegoCould you please tell me how I can solve this problem.I do highly appreciate your help.Thanks a million in advance.best regards,mamun
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Feb 14, 2006
I just upgraded from SQL2000 to SQL 2005. When I have a query opened for a database already and I want to drag and drop a script in, I get the login box. Is there anyway to get this to not happen? I would like it that when I drag and drop the script it is just loaded in a new query with the database connection that I was using already. (This is what it did in SQL2000) Thanks.
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Apr 4, 2002
Hi,
I get the following error message while droping unique index.
Server: Msg 3723, Level 16, State 5, Line 1
An explicit DROP INDEX is not allowed on index 'dbo.ALEG.IX_ALEG'. It is being used for UNIQUE KEY constraint enforcement.
Could you please how the index can be droped.
Thanks
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Dec 26, 1999
Anybody had experience dropping the system generated index?
I tried to drop some auto-generated index which usually have name like _WA_Sys_[column name}_07F6335A. Then I follow the table.index name rule. It always show no such index exists in the database. But I can query these indexes in sysindexes and verify they are there. What went wrong?
Help appreciated very much.
wilson
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Apr 20, 2007
I have a database that is about 300 gig. I am setting up replication to a reporting server. We are doing a series or mock loads and I will need drop the tables and reload the main database a few times before we go live. To do that I plan to stop replication and drop all the articles, drop the subscription, then load the new data, then reinitialize and restart replication.
The first time I tried to do this, when I drop the articles, it seems to be trying to "clean up" the distribution database on the reporting server and that is taking a couple of hours to do. The disruption database is about 40 gig.
Is this correct behavior in SQL2005 replication? Is there a way to avoid this? I have all the replication pieces scripted out and would like to just drop replication, reload, and then run my scripts to recreate replication. But this "clean up" is going to cause me a lot of headache if I don't figure out what is going on.
Am I going down the wrong road here? Is there an easier way to do this? Any comments would be great!!!!
Thanks in advance for any help.
Jim Youmans
St. Louis Missouri
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Jan 9, 2004
I need to check one table while updating another table
suppose i need to check table1's value is whether less then 0 or not
without if condition can i check it with update query?
thank you
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Aug 6, 2014
how i can check for duplicate entries for example if a serial number has already been inputted and a user tries to input the same serial number.. how can i get a trigger or some sort to check for duplicates and then prompt that the number has already been entered.
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Sep 18, 2007
Hi,
I have a table as follows
Table
{
Category1,
Category2,
Category3
}
I wanted to write a query to check whether the column with the name 'Category3' exists in the table.
Can anyone please let me know how to do this
Best Regards and Thanks
~Mohan Babu
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Jan 7, 2008
Hai,
Can anybody help me to write a script to see whether the table have records, if records are available then delete all those records?
Thanks.
Regards
Kashif Chotu
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Jul 20, 2005
Hi All,I have a table in SQL Server 2000 that contains several million memberids. Some of these member ids are duplicated in the table, and eachrecord is tagged with a 1 or a 2 in [recsrc] to indicate where theycame from.I want to remove all member ids records from the table that have arecsrc of 1 where the same member id also exists in the table with arecsrc of 2.So, if the member id has a recsrc of 1, and no other record exists inthe table with the same member id and a recsrc of 2, I want it leftuntouched.So, in a theortetical dataset of member id and recsrc:0001, 10002, 20001, 20003, 10004, 2I am looking to only delete the first record, because it has a recsrcof 1 and there is another record in the table with the same member idand a recsrc of 2.I'd very much appreciate it if someone could help me achieve this!Much warmth,Murray
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Sep 19, 2007
I've got two tables, one containing a list of company names(approx 10,000 records), the other containing a list of company employees (approx 30,000 records) joined by the CompanyID column.
I have a third table (approx 700 records) containing new employees to be added to the employee table. Each record in this table has the employees details plus the name of their company.
I want to write a query that will check each row in the third table to see if
a) the employee exists in the Employees table
b) the company exists in the Companies table and
c) the employee is listed under the correct company
The query should also handle any combination of the above. So if the company doesn't exist but the employee does, create the company on the companies table and update the appropriate record on the employees table with the new CompanyID etc. etc.
Oh, forgot to mention. The company names in the third table won't be exactly the same as the ones in the Company table so will need to use CharIndex.
Anybody got any ideas?
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Sep 10, 2007
Hi,
I want to use something like select count(*) from table name = 0; to check whether a table is empty,
is this possible?
Thanks for any info.
Al.
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Sep 23, 2007
Greetings!!
I have a MsAccess db containing a table called Employees which i am transforming to Sql server 2005. Everything is working fine. I am using Foreach File enumerator and uploading the files one by one.
However I now plan to validate the schema of MsAccess before uploading it. For eg: My employee table in msaccess is as follows :
Employees
empId int,
empName varchar(60),
empAge int
Since the files come from different vendor, while looping, i want to perform a check if the empid or empAge are not of type long or are not null. If they are of type smallint,i have no problem.
However if they are larger datatypes than the the ones kept in Sql server, then the file needs to be logged in the db with the reason and moved to the error folder. In short, if the datatypes in access tables are smaller than those in Sqlserver, allow it, otherwise reject it.
THe schema of Sqlserver table is same as of that of Employees in msaccess.
How do I do it.
Thanks ,
Lolsron
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