#Microsoft access 2013 tutorial 3 case 4 how to#
#Microsoft access 2013 tutorial 3 case 4 code#

On the Orders table, make sure the values of the CustomerId and ProductId fields match those in their respective primary key fields.This means you won’t be able to enter a value into a foreign key field that doesn’t correspond to a value in the primary key field. You need to do this because we set up the database to enforce referential integrity. Then once all the primary keys are populated, you can enter data into the Orders table. Do the Orders table last. Enter data into the Customers table and the Products table first.Only enter data into the two middle fields of each table. No need to enter data into those fields (remember, one’s an AutoNumber and the other has a Default Value set).

The ID fields and DateCreated fields will be populated automatically.

You can copy the data from these tables or you can add your own. (If you already have data in your tables, skip this step). Here are the three tables that we created earlier in the tutorial, but this time they contain data. You’ll need to have some data in your tables before you create a query.

Simply open it from the database and it’s ready to go. So no need to rebuild the same queries over and over again. Queries can also be saved to the database. But it’s not just any old search.Ī query allows you to specify exactly which fields you want returned, and from which tables.Ī query also lets you add criteria for filtering the data. So for example, you could specify that you only want to see orders worth more than $100, or only products of a particular brand, or only customers who have only ever purchased one item, etc. Queries allow you to “search the database”.

Create a macro (so that a multi-step task can be done automatically – at the click of a button).

Create a query (so you can “search the database”).

The results would now be displayed in a column called PartialName.This article is Part 3 of the Microsoft Access tutorial. You can replace Expr1 with a column name that is more meaningful.įor example: PartialName: Mid(,3,10) The results will be displayed in a column called Expr1. This query will return 10 characters from the CategoryName field starting with the 3rd position in the string. In this query, we have used the Mid function as follows: Expr1: Mid(,3,10) You can also use the Mid function in a query in Microsoft Access. The variable LResult would now contain the value of 'abet', since omitting the final parameter will return all characters after the start_position. If you omitted the number_of_characters parameter in the above example: Dim LResult As String The variable LResult would now contain the value of 'ab'.

#Microsoft access 2013 tutorial 3 case 4 code#

The Mid function can be used in VBA code in Microsoft Access.

#Microsoft access 2013 tutorial 3 case 4 how to#

Let's look at how to use the Mid function in MS Access: Mid ('Tech on the Net', 1, 4) The Mid function can be used in the following versions of Microsoft Access: If you omit this parameter, the Mid function will return all characters after the start_position. The number of characters that you wish to extract. start_position The position in the string that you will begin extracting from. The syntax for the Mid function in MS Access is: Mid ( text, start_position, ) Parameters or Arguments text The string that you wish to extract from. The Microsoft Access Mid function extracts a substring from a string (starting at any position). This MSAccess tutorial explains how to use the Access Mid function with syntax and examples.