You are reading the article How To Create, Edit And Delete A Table Relationship In Microsoft Access updated in December 2023 on the website Kientrucdochoi.com. We hope that the information we have shared is helpful to you. If you find the content interesting and meaningful, please share it with your friends and continue to follow and support us for the latest updates. Suggested January 2024 How To Create, Edit And Delete A Table Relationship In Microsoft Access
In Microsoft Access, a Relationship helps you to merge or link data from one table to another. Relationships allow the user to create Queries, Forms, and Reports. When tables are created for each topic in a database, you must place common fields into the table related and form a relationship with them for information to be brought together again.Create, Edit, Delete a Table Relationship in Access
There are three types of Relationships:
One-to-One Relationship: One-to-One Relationship is the simplest kind of Relationship and the least common because the information related is stored in the same table. It links one table to a single record in another table; Primary Keys links tables. One- to- One Relationship can connect a table with many fields together and separate a table for security reasons.
A One-to-Many relationship: One-to-Many Relationship is the most common Relationship; it links each record in one table to several records in another table. Only one of the fields been linked can be the Primary Key, and the Primary Key must have one record for many records in another table.
Many-to-Many relationships: Many-to-Many Relationship requires a Junction Table, which includes the Primary Key column of the two tables you want to connect. Many -to Many Relationship allows you to connect each row of one table to many rows in another table.Why use table relationships in Access?
Table Relationships updates your form and report designs – When you design a form and report, a Relationship is needed for Access to gather the information that can be placed in the form or report you have created.
Table Relationships updates your query design – For records to work from more than one table, a query must be created to join these tables. The query works by matching the values in the first table’s primary key field with the foreign key in the second table.
Referential Integrity can be enforced in a table relationship – Referential Integrity helps to prevent orphan records in your database. An orphan record is a record with reference to another record that does not exist.
In this article, we are going to explain:
How to Create a Relationship in Microsoft Access
How to Edit a Relationship in Microsoft Access
How to Delete a Relationship in Microsoft Access1] How to Create a Relationship in Microsoft Access
The Edit Relationship dialog box will be seen again with your selected choice; press create. There is also a shortcut option where you can drag the Primary Key from one table to another table; any table linked must be related to the Primary Key. This will form a relationship between the two tables.2] How to edit relationships in Microsoft Access
You can modify your Relationships in Microsoft Access; here are a few steps in doing so.
Double-tap on the Relationship Line, and the Edit Relationship dialog box will show up.
Make whatever changes you want to make.3] Deleting Relationships in Microsoft Access
To Delete a Relationship, you must remove the line from the two tables; these are the measures.
A dialog box will pop up asking you ‘if you are sure you want to permanently delete the Relationship.’
Related read: How to build Tables with Table Designer in Access.
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It wouldn’t be news to you that you can easily change the ringtone of your Android device by going into the Settings followed by Sound and Notifications. However, in this tutorial, we will tell you how to further step-up your relationship with the ringtones and notifications of your Android device.
You know what makes life easy? If you set a custom ringtone for your favorite contacts. Then, whenever you get a call from them, you don’t need to move to check your phone you instantly know who is calling. Though, of course, you would have to move if you want to answer the call.
Here are the steps to set a custom ringtone for any contact:
Open the Contacts app and navigate to the contact that you want to set a custom ringtone.
Open the individual contact and tap the three vertical dots at the top right corner. From the menu, select the “Set ringtone” option. A popup will open with the preinstalled ringtones of your device. Tap the ringtone that you want to keep for that contact and hit OK.
However, in some devices, you won’t find the “Set ringtone” option under three vertical dots. For these devices, tap the pencil icon next to it. You will then see a field with the name “Ringtone”. Tap it to set the ringtone for your contact. In case, the “Ringtone” field is missing, tap the “Add Another Field” option followed by ringtone.
Also read: How to create video slideshow of photos on Android
How to create your own ringtone out of a song or music file
Liked a song and want to keep a portion of it as your ringtone, but don’t know how to? Well, you are not alone. Many people are sailing in the same boat. Although some of the devices have a built-in feature to crop a music file, others are not so lucky. But, hey, don’t worry. With Android, there is always a way.
In case you never bothered to check or never anticipated the presence of ringtone maker apps on Google Play Store, let me tell you, Google Play Store is loaded with Ringtone maker apps. With almost same user interface, all the apps also have identical working. Some of the amazing apps are Ringtone maker by Big Bang, MP3 cutter, Ringtone Maker by MeiHillMan. You can use any app you like, but for this tutorial, we are using Ringtone maker by Big Bang.
Here are the steps to create a ringtone from any music file.
Download and install Ringtone maker by Big Bang.
Open the app and tap the three horizontal lines at the top left corner to open the navigation bar. From the menu, tap “Browse”.
If you use another app, you also need to tap the “Browse” option, though the location of “browse” option might be different.
A file browser will open. Scroll down and hit the “sdcard” option for internal memory and “ext storage” for the memory card. (yeah, I know, they have messed up the names). Then, go to the location where your music file is present. Tap the music file to open it.
When the music file opens in the app player, drag the scrollbar to set the start and end time. For accurate timing, tap the plus and minus icon next to the timing at the bottom.
Finally, when you are happy with your audio, tap the Save icon at the top to create a ringtone. You will be asked to name the file and select the type, whether you want to save it as ringtone, notification sound or an alarm. Choose your desired option and hit Save.
Further, you will be asked whether you want to make it your default ringtone or assign it to a contact. Select it as per your need. Your custom ringtone will be automatically applied either as your default ringtone or to a contact, depending on what you selected.
Wasn’t that easy?
Also read: How to recover notifications cleared from notification bar on Android, including Samsung devices
How to add a new ringtone to your device
Many times there are music files on our device that are worth to be kept as a ringtone but they don’t appear in the ringtone list while selecting one. Also, suppose you find a great ringtone on the internet, or perhaps liked a certain ringtone on your friend’s device. How do you make it your default tone? Worry not, my dear friend, let me explain how to do it.
Here are the steps to add a new ringtone to your device:
Open the location where you ringtone is present through a file manager. If nature has denied you the built-in File Manager for your device, head on to the Google Play store and download either a ES File Explorer or Solid Explorer.
Long touch the ringtone and tap on “Cut”.
Navigate to the “Ringtones” folder on your device memory and paste the ringtone.
That’s all you have to do. Now, in the list of ringtones, you will find your new ringtone that you can either set as your default tone or set it for a particular contact.
However, if the ringtone doesn’t appear in the list, reboot your device. That will do the trick.
Also read: Cool hidden features of your Android device
How to add new notification tone for the apps in Android
If you are bored with the default notification tone of the apps, you can make it more lively and exciting by adding new notification tones to your device.
Here are the steps to add new notification tone to your device.
Download the new notification tone or create your own notification tone as described above.
Using File Explorer, head to the location where your new notification tone is present. Similar to the ringtones, long touch the tone and cut it.
Navigate to the “Notification” folder on your device memory and paste the tone. In some devices, if the Notification folder is missing, navigate to the “Media” folder followed by “Audio” folder and finally “Notifications”.
To change the device notifications, head to the Sound and Notification in the setting followed by notification. You will find your new notification in the list. For apps, you would have to change the notification individually, in their own setting.
When you want to display different data sets visually, you can create a combination chart. If you want to show something like sales with costs or traffic with conversions, a combo chart in Microsoft Excel is ideal.
We’ll show you how to create a combo chart in Excel as well as customize it to include the elements you need and give it an attractive appearance.
Table of ContentsHow to Create a Combo Chart in Excel
You have a few ways to create a combo chart in Excel. You can convert an existing chart, select a quick combo chart type, or set up a custom chart.
Convert an Existing Chart to a Combo Chart
If you already have a chart showing your data, like a bar chart or even a pie chart, you don’t have to delete it and start from scratch. Simply turn it into a combo chart.
Select your current chart and go to the
Change Chart Type
in the Type section of the ribbon.
When the chart window opens, pick
on the left.
Then, select one of the combo chart layouts at the top and customize the series at the bottom.
and you’ll see your new chart replace the original one.Select a Quick Combo Chart Type
Excel offers three combo chart types that you can pick from for your data.
Select your data set and go to the Insert tab.
In the Charts group, choose the Insert Combo Chart drop-down arrow to see the options. Pick from a clustered column with a line chart, a clustered column and line chart with a secondary axis, or a stacked area and clustered column chart.
Create a Custom Combo Chart
If you don’t have an existing chart and prefer to customize the series and axis for the combo chart from the start, you can create a custom chart.
Select your data set and go to the
Insert Combo Chart
drop-down arrow and pick
Create Custom Combo Chart
When the chart window opens, you’ll see four combo chart types at the top. Select one of these as the base for your custom chart.
At the bottom, you’ll see your data series, chart types, and options to pick a secondary axis. As you make your adjustments, you’ll see a nice preview of the combo chart directly above.
While a column chart and line graph work well together, you can choose a different chart type for each data series if you like. Select the drop-down box below
to the right of the series you want to change and select the new chart type.
By default, the first data series displays on the primary axis. However, you can change this or simply add a secondary axis using the
check boxes on the right side.
When you finish creating your custom combo chart, pick
to save it and place it on your worksheet.How to Customize a Combo Chart
Once you choose and insert your combo chart, you may want to add more elements or give the chart some pizzazz. Excel offers several features for customizing a chart.Go to the Chart Design Tab
For basic appearance features and chart elements, select your chart and go to the Chart Design tab.
Starting on the left side of the ribbon, you can use the Add Chart Element drop-down menu to add and position items like the chart title, data labels, and legend.
To the right, use the Quick Layout menu to change the layout to include and position elements without having to do so one-by-one.
In the Chart Styles section, you can use the Change Colors drop-down menu to pick a different color scheme or the Styles box to choose a whole new design.
With the remaining options on the ribbon, you can switch columns and rows, change the chart data selection, pick a new chart type, or move the chart to another sheet.
Open the Format Chart Area Sidebar
Use Chart Options or Text Options at the top of the sidebar depending on which item you want to change. You can then use the tabs directly beneath to make your changes.
Chart Options: Change the fill and border styles and colors, add effects like a shadow or soft edge, and set the size or position for the chart.
Text Options: Change the fill or outline styles and colors, add effects, and position or align the text.Use the Chart Buttons (Windows Only)
One more way to make adjustments to your chart is to use the buttons that display on the right side of it. These are currently only available in Microsoft Excel on Windows, not Mac.
Chart Elements (plus sign): Like the Chart Elements drop-down box on the Chart Design tab, you can add, remove, and position items on the chart.
Chart Style (paint brush): Like the Chart Styles section on the Chart Design tab, you can pick a different color scheme or style for your chart.
Chart Filters (filter): With this button, you can check or uncheck the details in your dataset that you want to display on your chart. This gives you a quick way to view only specific chart data by hiding other details temporarily.
Now that you know how to create a combo chart in Excel, look at how to make a Gantt chart for your next project.
Introduction to MongoDB Database
MongoDB database is defined as a created database for database operations; using MongoDB database, we are creating the collection into it. MongoDB is not a structured database, so we have not used create database statements which we have used in other databases like MySQL and PostgreSQL. We can create the database in MongoDB by using the database and using the keyword, it is used to create a new database in MongoDB; after using the database, we are creating the collection into the same. We can create multiple databases on a single MongoDB server default database that we have used in MongoDB is db.
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Hadoop, Data Science, Statistics & othersHow to Create Database in MongoDB?
Basically, we have used the use command to create a new database in MongoDB.
Below is the syntax :
In the above syntax, use keyword specifies that create a new database. We can create any new database by using use keywords.
The name of the database shows the database name that we are creating in MongoDB. We can create a database by specifying the name of the database parameter.
If using the database is exist on the server it will use the existing database instead of creating the new database.
The below example shows that create a new database:
In the above example, we have created a database name as db_test after creating, we can see the connected database name by using the db command.
We can show all the created and system databases by using the show dbs command.
The below example shows that list as follows:
After using a database, it will not show in the show dbs command; after creating a collection or object of the database then, it will show using the show dbs command.
The below example shows the same:
In the above first example, we have created a database named db_test1 it will show a connected database by using the db command but not show in the list of databases, because we have not created any collection or object into the db_test1 database.
In the second example, we have created one collection at the time of data insertion after creating the collection into the db_test1 database; the name of the database is shown using the show dbs command.
Next time after using the use db_test1 command, we have automatically connected to the db_test1 database.
Admin and local databases are the system database which was used in the MongoDB server.
Show dbs command will show all database names and sizes of all databases.How to Alter Database in MongoDB?
We are using the copyDatabase command to rename a database.
In above syntax copyDatabase is defined as the command used to copy one database to another database with a different name.
The name of the old database is defined as the old database name, which we have used to copy the database to a new name.
The name of the new database is defined as the new database name, which we are renaming using the copyDatabase command.
We cannot directly rename the database; to rename the database, we are using the copyDatabase command.
After copying to the database, we are connecting to the old database and we have to delete the old database.
The below example shows that alter database command to rename the database with a new name:
In the above example, first, we have copied the database from db_test to db_test1 database. After a successful copy from db_test to db_test1, we connected to the db_test database.
After connecting, we dropped the old database using the dropDatabase command.
Basically, there is no rename database command available in MongoDB, so instead of rename database command, we are using copyDatabase.How to Delete Database in MongoDB?
Below syntax and example show how to delete the database:
We have dropped the database in MongoDB using dropDatabase command.
The below syntax shows to drop the database, first, we need to connect the specified database which we are dropping.
In the above syntax name of the database is defined as the database name which we are dropping from the server.
Given below example shows deleted database:
In the above example, we have deleted the database name db_test1.
To delete the database, we need to connect to the specified database, which we are dropping in MongoDB.
The connected database will be deleted from the database server; so after using this command, we need to check the database name which we have connected.
The below example shows the same:
In the above example, first, we have connected to the db_test database. After connecting, we have deleted the same from the database server.Conclusion
We are creating the database by using the use db command, and if the database already exists in the database, then we are connecting to the existing database. We are renaming the database by using the copyDatabase command, also, we can drop the database by using dropDatabase command.Recommended Articles
This is a guide to MongoDB Database. Here we discuss how to create, alter, and delete databases in MongoDB with respective query examples. You may also have a look at the following articles to learn more –
Introduction to SQL ROW
A row in SQL or any relational database is basically a tuple that holds implicitly structured data values in a database table. For the uninitiated, a tuple in any programming language is a set of multiple data values that forms a single record for a particular relation. Rows and columns in SQL can be considered similar to rows of a grid or matrix, where each row contains values for every column. Rows form the building blocks of any relational database.
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The highlighted tuple or row forms a row in the relational database.Creating a Row Structure
It is logical to believe that in order to create a row, we must first create a table. A row to a table is like soul to the body. Ergo, to begin with, let us create a database table called “students”. We can use the following code snippet to create the said table.
Code:CREATE TABLE students ( roll_no int NOT NULL PRIMARY KEY, student_name VARCHAR(255), degree_major VARCHAR(255) NOT NULL, degree_year VARCHAR(255) );
The given CREATE TABLE statement will create a structure where each row in the table will consist of roll_no, student_name, degree_major, and degree_year values.Adding Rows in a Database Table 1. Insert statement for adding a row
Code:INSERT INTO students( roll_no, student_name, degree_major, degree_year) VALUES (1,'Deep Jain','Computer Science Engineering','I');
The command got executed successfully, thereby creating a row in the students table. The said row can be visualized using a SELECT query. We can fetch all the rows from any table using a SELECT * or SELECT ALL statement.
Code:SELECT * FROM students;
Now we have a row with data values in the student’s table.2. Insert statement for adding multiple rows
You must be wondering how to add multiple rows in a datatable. It’s simple, we can use the same good old INSERT statement in the following manner.
Code:INSERT INTO public.students( roll_no, student_name, degree_major, degree_year) VALUES (2,'Drake G','Biotech Engineering','IV'), (3,'Mathew Silverman','Electrical Engineering','II');
The INSERT query just created two more rows in the student’s table. Have a look for yourself using the SELECT statement.
Code:SELECT * FROM students;
Output:Deleting a Row from the Database Table
When it comes to deleting/removing one or more rows from a database table, we use the DELETE statement.1. DELETE statement for deleting a row
Code:DELETE FROM students WHERE degree_year = 'IV';
We successfully removed a row where degree_year value is ‘IV’.
Now, the student’s table looks something like this.
Code:SELECT * FROM students;
Output:2. DELETE statement for deleting all rows
In order to delete all the rows in the database table, use the DELETE statement without the WHERE clause.
Code:DELETE FROM students; Modifying or Updating an Existing Row in the Data Table
What if you do not want to delete a row but modify some values in it. This can be achieved using an UPDATE statement.
Here is an example to update the roll_no of a student named ‘Mathew Silverman’ to 2 instead of 3.
Code:UPDATE students SET roll_no = 2 WHERE roll_no = 3;
Code:SELECT * FROM students;
The row has been successfully updated.Assigning Row Numbers to Rows in the Data Table
Suppose we want to sequentially arrange rows in the database based on a column value. We can do so by using the ROW_NUMBER function in SQL. It helps us in fetching data rows based on their row number.
Here is how you can add row numbers to existing rows in the datatable.
Code:SELECT roll_no, student_name, degree_major, degree_year, ROW_NUMBER () OVER (ORDER BY roll_no) FROM students;
Output:Filtering Rows for Final Result Set
When fetching rows for the final result set, we might not always want to fetch all the rows from the said table. We can filter rows using a WHERE, HAVING, LIMIT or TOP clause.
Here is how to filter rows using the WHERE clause.
Code:SELECT roll_no, student_name, degree_major, degree_year FROM students WHERE degree_major = 'Electrical Engineering';
Here is how to limit the number of rows appearing in the final result set.
Code:SELECT * FROM students LIMIT 1; Adding Constraints to Row Values
We cannot directly add constraints to a row in SQL, but we can add constraints such as NOT NULL, UNIQUE, CHECK, etc. to columns which will eventually get reflected in the rows.
Here is how we can add constraints to an existing table.
Code:ALTER TABLE students ADD CONSTRAINT unique_class UNIQUE(degree_year);
The unique_class constraint has been successfully created.
Let’s try inserting a new row with a duplicate value for degree_year.
Code:INSERT INTO students( roll_no, student_name, degree_major, degree_year) VALUES (3,'Rohan Joshi','Integrated Physics','I');
See the new row could not be inserted in the table. Now try this next query with a unique value for degree_year.
Code:INSERT INTO students( roll_no, student_name, degree_major, degree_year) VALUES (3,'Rohan Joshi','Integrated Physics','III');
The query returned successfully. The new row looks something as follows.
Code:SELECT * FROM students;
Output:Conclusion – SQL ROW
A row can be considered as the building block of any relational database. It is the tuple that holds data values together for each relation in the table. If you know how to work with rows, you know how to work in any relational database.Recommended Articles
We hope that this EDUCBA information on “SQL ROW” was beneficial to you. You can view EDUCBA’s recommended articles for more information.
As a TikTok creator, you might have to delete one of your TikTok videos at some point.
If you’ve been consistently uploading videos on TikTok, your older ones might not be relevant to your niche anymore.
Other times, your old videos might be so bad in quality that you want to delete them.
If that’s the case, you can either choose to hide your TikTok video by changing its privacy settings or delete it.
If you’re certain that you no longer want the video to be on TikTok, you can delete it from your profile.
However, if you want to display the video on your profile in the future, changing its privacy settings is a better idea.
In this guide, you’ll learn how to delete a TikTok video in 3 easy steps.How to delete a TikTok video
To delete a TikTok video, navigate to the video that you want to delete and tap on the three dots.
Then, scroll to the extreme right of the navigation menu and tap on “Delete” to delete the video.
After you’ve deleted the video, it will no longer be displayed on your profile.
Your video won’t show up on other users’ “For You” page anymore as well.
Keep in mind that this process is irreversible, and you won’t be able to recover the video that you’ve deleted.
Hence, before deleting a video on TikTok, make sure that you’ve saved it in your camera roll.
Otherwise, if you happen to regret your decision, you won’t be able to recover it back.
Here’s how to delete a TikTok video:1. Navigate to the video
The first step to delete a TikTok video is to navigate to the video that you want to delete.
To begin with, open TikTok on your mobile device.
Next, tap on the profile icon on the bottom navigation bar to visit your profile.
Navigate to the video that you want to delete.
Lastly, tap on the video to expand and view it.
You’ve successfully navigated to the video that you want to delete on TikTok.
In the next steps, you’ll learn where the “Delete” button is located.2. Tap on the three dots
On the right sidebar of the video, tap on the three dots.
After you’ve navigated to the video that you want to delete, it’ll start playing.
On the right of the video, you’ll see a sidebar with a few icons—your profile picture, a heart icon, a chat icon, and three dots under it.
Tapping on your profile picture will bring you to your TikTok profile.
The icon that you want to be tapping is the three dots.
The three dots icon is for editing the video, sharing it, and so on.
In the final step, you’ll learn how to delete the video from your profile.3. Tap on “Delete”
The last step is to delete the video from your profile.
After you’ve tapped on the three dots on the video, a navigation menu will be opened.
The navigation menu contains several options—you can send the video to someone on TikTok, share it with someone outside of TikTok, and edit the video.
On the final section of the navigation menu, you’ll see the analytics option (if you have a business account), the save video option, the duet option, etc.
Scroll to the extreme right of the section, and at the end of it, you’ll see the “Delete” option.
Tap on “Delete” to delete the TikTok video from your profile.
Then, go back to your profile, and the video will be gone.
Congrats, you’ve successfully deleted a TikTok video.How to delete someone else’s TikTok video
To delete someone else’s TikTok video, you can either file a report for copyright infringement or report the video on TikTok.
However, if the video does not infringe your copyright, or does not violate TikTok’s community guidelines, it will not be deleted unless the user deleted it themselves.
If you believe that a TikTok video infringes your copyright, you can file a report to TikTok and have them take it down.
On the other hand, if a video violates one or more of TikTok’s community guidelines, you can report it on TikTok.
To report a video on TikTok, navigate to the video, tap on the share icon, then tap on “Report”.Is it bad to delete TikTok videos?
Deleting your TikTok videos does not negatively affect your organic reach.
However, if your video gets taken down because it violated TikTok’s community guidelines, your views and engagement will drop.
Although deleting your TikTok videos is generally safe, a better alternative is to private them instead.
Keep in mind that deleting a TikTok video will decrease your total number of likes (if the video has likes).
So, if the video has a ton of likes, you might want to consider to private it instead of deleting it.Conclusion
Firstly, if your old videos aren’t relevant to your niche anymore, you can delete them to keep your videos consistent.
Secondly, if you have a ton of under-performing videos, deleting them will ensure that your profile only contains quality videos.
That way, people are more inclined to follow you and watch your videos.
Either way, deleting your TikTok videos is a great way to organize your feed.Further Reading
How to Hide Videos on TikTok
How to Link Your Discord to TikTok
What Does “Clear Cache” Mean on TikTok?
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