LibreOffice-Suite-Base/C2/Create-queries-using-Query-Wizard/English-timed

Time	Narration
00:02	Welcome to the Spoken tutorial on LibreOffice Base.
00:06	In this tutorial, we will learn how to: create simple queries using the Query wizard. Select fields Set the sorting order of the fields and provide search criteria or conditions for a query.
00:24	Let us first learn what a query is.
00:29	A query can be used to get specific information from a database.
00:36	In other words, we can "query" the database for some data that matches a given criteria.
00:48	For example, let us consider our familiar 'Library' database example.
00:56	We have stored information about books and members in our Library database.
01:04	Now we can query the Library database for all the members of the Library.
01:12	Or we can query the database for all the books that are not in the Library.
01:21	Let us see how we can create a simple query using Base.
01:30	Our example is to list all the members of the 'Library' along with their phone numbers.
01:44	We are in the 'Library' database. You probably know how to open this by now.
01:51	Let us click on the Queries icon on the left panel.
01:57	On the right panel, we see three options.
02:03	Since we are creating a simple query first, we will choose an easy and fast method.
02:11	And that is by using a Query Wizard.
02:17	For creating complex queries, Base provides us with very handy options such as 'Create Query in Design View'
02:28	and 'Create Query in SQL view' which we will learn about later.
02:36	For now, let us click on 'Use Wizard to Create Query'.
02:43	Now, we see a pop-up window that says Query Wizard on the top.
02:50	On the left, we see 8 steps that we will go through.
02:57	We are in Step 1 - 'Field Selection'.
03:03	On the right side, we will see a drop-down box underneath the label Tables.
03:11	This is where we will select the source of the data that we need from this query.
03:21	Since our example query is about getting a list of all the members of the Library, we will click on the Tables: Members from the drop-down box.
03:35	Now, let us double-click on the Name field in the Available fields list on the left and move it to the list box on the right.
03:50	Next, let us click on the Phone field on the left and move it to the right.
04:00	Note that to move all the fields to the right, we can use the double-arrow button that points to the right.
04:09	Now, let us click on the Next button at the bottom.
04:15	Now we are in Step 2 - Sorting Order.
04:20	Since the result of our query is a list of members and their phone numbers, we can leave this as it is.
04:30	Or we can order the list by member names.
04:36	The Base Wizard allows us to sort up to 4 fields in the result list at a time.
04:45	For now, let us click on the top most drop-down box,
04:51	And click on Members.Name.
04:55	We can also choose if we want to sort the names in ascending or descending order.
05:03	Let us click on the Ascending option
05:07	and proceed to the next step.
05:11	Step 3 - Search Conditions.
05:16	This step will help if we want to limit our result set to some conditions.
05:22	For example, we can limit the result set to only those members whose name starts with the alphabet R.
05:34	For this, we will click on the Fields drop-down box and then click on Members.Name.
05:45	Now, click on the Condition drop-down box.
05:51	Notice the various conditions here.
05:58	Let us click on like.
06:02	In the Value text box, let us type in ‘capital R’ and a ‘percentage symbol’.
06:13	This is how we can introduce simple and complex conditions into our query.
06:22	Let us now delete the 'R%' from the Value text-box to list all the members and click on the Next button.
06:37	Please note that we have skipped to Step 7.
06:43	This is because we are creating a simple query from a single table.
06:51	And our query will return details and not summaries.
06:57	Summary queries show data from aggregate functions and by grouping.
07:05	Some examples are count of all the members or sum of the prices of all the books.
07:13	We will learn about these later.
07:17	Okay, now here let us set aliases,
07:23	meaning- let us provide friendly and descriptive labels or headers in the resulting list.
07:32	So the 'Name' field can have an alias as 'Member Name' and the 'Phone' field can have an alias as 'Phone Number'.
07:46	So, let us type in these new aliases in the two text-boxes and click on the Next button.
07:57	Now, we are in Step 8 - the final step.
08:03	Here let us give a nice descriptive name to our simple query.
08:09	Let us type in 'List of all members and their phone numbers' against the 'Name of the Query’ label.
08:20	Now, notice that we see an overview of our choices in the wizard.
08:27	And how do we want to proceed from here?
08:31	Let us click on the 'Display Query' option on the top right side and click on the Finish button.
08:41	The wizard window has closed and there is a new window whose title says- 'List of all members and their phone numbers'.
08:52	Notice that we see all the four members that we originally entered in the Members table along with their phone numbers.
09:04	Also, we see that this list is arranged alphabetically in ascending order.
09:13	So, this is our first simple query.
09:18	Here is an assignment.
09:21	Create a query that will list all the Books in ascending order.
09:28	Include all fields.
09:31	Name it as ‘List of all books in the Library’.
09:38	This brings us to the end of this tutorial on Creating Queries using Wizard in LibreOffice Base.
09:45	To summarize, we learned how to : Create simple queries using the Query wizard, Select fields Set the sorting order of the fields And provide search criteria or conditions for a query.
10:00	Spoken Tutorial project is a part of the Talk to a Teacher project, supported by the National Mission on Education through ICT, MHRD, Government of India.
10:12	This project is coordinated by http://spoken-tutorial.org.
10:17	More information on the same is available at the following link.
10:22	This script has been contributed by Priya Suresh, DesiCrew Solutiions. And this is soundharya, DesiCrew Solutions, signing off. Thanks for joining.

Contributors and Content Editors

Gaurav, Minal, PoojaMoolya, Sandhya.np14