View source for LibreOffice-Suite-Base/C2/Create-queries-using-Design-View/English-timed

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||'''Time'''
|| '''Narration'''

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||Welcome to the Spoken tutorial on LibreOffice Base.

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||In this tutorial, we will learn how to

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||Create a query by using the Design View.

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||Add tables to the Query Design window

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||Select fields.
Set up aliases,
Set up sorting order
And provide search criteria for a query

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||For this, let us consider our familiar Library database example.

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||In this Library database, we have stored information about books and members.

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||And, we also have a table to track the books issued to the members.

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||Now we will create a new query, to list all the books that have been issued to the members,

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||In other words, let us generate a history of books that have been issued to the members.

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||Lets open the Library database.

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||Let us click on the Queries icon on the left panel.

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||On the right panel, we will click on the ‘Create Query in Design view’. We now see a new window which is also called the Query Design window,

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||And we also see a small popup window at the top, that says Add Table or Query.

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||Here is where we will define the source of the data for the query.

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||And we will need all the three tables for our query to generate the history of the books issued to members.

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||We will do this by clicking on the Books table in the list and then clicking on the Add button on the right in the popup window.

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||We will similarly add the BooksIssued table and the Members table <pause>

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||We now see that, the three tables have appeared in the background query design window.

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||Let us now ‘Close the popup window.

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||This brings the Query design window to the foreground.

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||Notice that the three tables are in the top half of the window

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||Here let us introduce some space among these tables.

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||Let us click, drag and drop the Members table to the far right.

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||And then, click, drag and drop the BooksIssued table to the centre.

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||Now we see lines linking these tables and these are the relationships that we had established earlier.

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||We can double-click on the lines to see the relationship details.

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||For now, let us see the bottom half of the Query design window.

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||This area has several rows of cells. As we design the query, we will fill these up.

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||First, we will check the Field column.

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||This is for specifying the fields we need to display in the result set.

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||To do this, we will first double click on the Title field in the Books table in the upper half of the window.

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||Next is the Name field in the Members table.

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||And then the Issue Date field in the BooksIssued table.

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||Next, the Return date,the actual return date
And finally the checked in field.

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||Notice these fields in the bottom half of the window in the first row.

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||Also the corresponding table names in the third row.

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||Next, let us look at the ‘Alias’ in the second row.

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||This is where we can enter descriptive names for the selected fields.

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||So let us type in aliases as shown in the image.<pause>

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||And we are done with the aliases.

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||Next, let us look at the Sort row.

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||We can specify the ordering of the result set here

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||Since we need a history of the books issued, we will order it chronologically.

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||Meaning we will sort the result set by the Issue Date in ascending order.

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||For this, we will click on the empty cell in the Sort row, under the Issuedate field.
And let us click on ‘Ascending’.

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||Okay, we will go to the next row - ‘Visible’

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||Here we can set the visibility of the fields we selected by checking or un-checking them.

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||Notice that, by default, all of them are checked.

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||Next, we will go to the ‘Function’ row.
This is used to create complex queries.
We will skip this for now.

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||and we will go to the ‘Criterion’ row.

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||This is where we can limit the result set to a simple or complex set of criteria.

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||For example, we can query for those books only, which were issued but have not been returned by members,

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||meaning, only those that are not checked in.

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||So let us click on the empty cell in this row, under the CheckedIn field
and type in ‘Equals Zero’.

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||Thats it, let us run this query now.

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||We can use the keyboard shortcut F5, or click on the Edit menu at the top of the window,
and then click on ‘Run Query’ at the bottom.

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||Can you see some data in the upper half of the window?

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||These are the results of your query.

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||Notice that, we see a history of books issued to members and ordered by Issue Date.
Also notice that none of the books are checked in.

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||Now we can go to the query design area below and change it any way we want .

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||For example, let us remove the Checked In criterion. <pause>

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||Now let us run the query by pressing F5 again.

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||This time we see a longer list of data returned from the query.

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||Next, let us save this query, by pressing Control S. This opens a small popup window.

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||Let us give a descriptive name to our query here.

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||Let us type ‘History of Books Issued to Members’

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||and then click on Ok button. and close this window.

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||We can open this saved query by double clicking on the query name in the main Base window.

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||So there, we have successfully created a query using the Design View

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||Here is an assignment:

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||Generate a list of the books issued to the member Nisha Sharma.
The list should be chronological by Issue date.

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||This brings us to the end of this tutorial on Creating Queries in Design View in LibreOffice Base

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||To summarize, we learned how to:

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||Create a query by using the Design View.
Add tables to the Query Design window
Select fields

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||Set up aliases,
Set up sorting order
And provide search criteria for a query.

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||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. This project is co-ordinated by http://spoken-tutorial.org. More information on the same is available at the following link

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||This script has been contributed by Priya Suresh, DesiCrew Solutions, and this is Soundharya DesiCrew solutions, signing off. Thanks for joining.


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