In MySQL, for the useless data, we can use the DROP TABLE command to delete it from the database. However, for the TDengine database, which SQL command can allow me to do the same thing?
You could follow the same routine to drop database/table as this is pretty much the same follows SQL standard:
drop database db_name
drop table tb_name
Related
We're using a .NET SQL Server database project to define our database, and it's not deleting tables from the server even though we have deleted them from the database project.
There is an option in the publish profile to drop objects that are in the target but not in the source. However, this doesn't work for temporal tables as I get an error saying it can’t drop temporal tables as the standard SQL drop command is not supported on the temporal table.
Is there a way to drop temporal tables using a SQL Server database project?
Temporal Tables are system tables. You can not drop them directly.
Try to set System Version off.
Your query will be like this.
ALTER TABLE <TEMPRAL_TABLE_NAME> SET ( SYSTEM_VERSIONING = OFF)
GO
DROP TABLE <TEMPRAL_TABLE_NAME>
I have tables in SQL Server which needs to cloned as hive tables. Since the create table schema will be different in both the cases,
I simply cannot use the create table statement from SQL Server or from any other RDBMS in hive.
I am trying to create a configurable script where one can provide the table schema as an input and it would provide me hive create table statements or a hql file with the create table schema
has anyone tried something similar.
I am working on a project that requires me to read/write to an OLEDB. I do not know what table the information I'm looking for is in and there are about 150+ tables. Is there a way to search each table for a certain column header without querying each table one by one? so far I've just been doing
SELECT * FROM [name]..[name].[name] GO
And reading the headers in data grid view on a vb.net program I made.
Try this if you have a user with dba privileges on the Oracle database.
SELECT OWNER, TABLE_NAME,COLUMN_NAME
FROM sys.dba_tab_columns
WHERE column_name LIKE UPPER('%Your column name%');
Can SQL commands like truncate be restricted at the user level (for specific databases / servers)?
A member of my team truncated a production table thinking he was in his development database and I would like to prevent this from happening again (without completely locking down his permissions).
You might try adding a tinyint field (default 0) to the table you wish to protect, and adding a foreign key constraint pointing to a dedicated, single record table. That should protect your table.
That said, you should probably get rid of this guy.
As far as I remember revoking ALTER permission on the table should do the trick (in all versions 2005 through 2012).
A person needs DDL permission on a table to do a TRUNCATE, since it's an unlogged operation. Even if a person has datawriter (or insert/update/delete), but lacks ALTER or DDL_ADMIN, they won't be able to truncate the table.
Sorry for my English.
There is database on SQL Server 2005 Enterprise. I wrote program which splits all tables on fileGroups by datetime. But the problem is that database schema is not designed for it and most information stays on the PRIMARY filegroup.
Please tell me how I can spread (split) tables onto two or more database servers for increased performance?
Are you looking for the syntax on how to move a table from one file group to another? See ALTER TABLE
ALTER TABLE dbo.MyTable
MOVE TO MyNewFileGroup
It sounds to me like you need to look into MS SQL Server's partitioning capabilities. You should not be doing this manually. Let the database solve that issue for you.