In SQL, you create a relationship by creating a foreign key constraint.
More specifically, you have a parent table and a child table. The parent contains the primary key, and the child table contains a foreign key that references the primary key of the parent table.
When you use SQL to create a relationship, you can create the relationship at the time you create the table, or you can create it later (by altering the table). This article covers both scenarios.
Here are a couple of T-SQL methods you can use to return the server name in SQL Server.
You can use the SUSER_NAME() function to see the login name that you’re currently using to access SQL Server.
This function returns returns the login identification name of the user. It also allows you to get the login name of any other user, based on their login identification number.
You may know that when you connect to SQL Server, the language for that session is usually determined by your login. When a login is created, it is assigned a default language.
The session language determines the datetime formats and system messages.
While you can certainly change the default language for a login, you can also override the default language within a session if you need to. You can toggle back and forth between languages if required. Or you could even open two separate connections and apply a different language to each of them.
This article explains how to change the language within a session.
Whenever you connect to SQL Server, a bunch of default settings are applied to your session. These include the language and the date format settings.
The date format is normally determined by your default language. For example, if your default language is us_english, then the default date format will probably be mdy, and the first day of the week will be day 7 (Sunday).
If you change your language, you the date format will implicitly be updated accordingly.
However, you still have the option of changing the date format without changing the language. To do this, you can use SET DATEFORMAT.
SQL Server provides the sys.time_zone_info server-wide configuration view to return a list of supported time zones.
You can retrieve these with a simple SELECT statement.
Microsoft introduced the CURRENT_TIMEZONE() function in SQL Server 2019 for returning the time zone of the server.
More specifically, this function “returns the name of the time zone observed by a server or an instance”.
MongoDB provides various ways to update a document. The method you use will depend on exactly how you want to perform the update.
This article presents 4 ways to update a document in MongoDB.
If you’ve installed the SQL Server Agent extension in Azure Data Studio, you will be able to see a list of SQL Server Agent jobs, as well as create, edit, view history, etc.
But you may be wondering how to delete a job.
If so, read on.
If you encounter the “index name must be a string” error when dropping multiple indexes in MongoDB, it’s probably because you’re passing the specifications document instead of the name.
When you use the dropIndexes() method or the dropIndexes command to drop multiple indexes, you need to pass the index names (not the specifications documents) in an array.