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Microsoft access 2016 union query free download –
Note: Union queries are always read-only in Access; you can’t change any values in datasheet view. Even though you can create a union query by directly writing the SQL syntax in the SQL view, you might find it easier to build it in parts with select queries. You can then copy and paste the SQL parts into a combined union query. If you’d like to skip reading the steps and instead watch an example, see the next section, Watch an example of building a union query.
On the Create tab, in the Queries group, click Query Design. Double-click the table that has the fields that you want to include. The table is added to the query design window. In the query design window, double-click each of the fields that you want to include.
As you select fields, make sure that you add the same number of fields, in the same order, that you add to the other select queries. Pay careful attention to the data types of the fields, and make sure that they have compatible data types with fields in the same position in the other queries that you are combining. Optionally, add criteria to your fields by typing the appropriate expressions in the Criteria row of the field grid. After you have finished adding fields and field criteria, you should run the select query and review its output.
On the Design tab, in the Results group, click Run. Now that you created your select queries, it’s time to combine them. In this step, you create the union query by copying and pasting the SQL statements. On the Design tab, in the Query group, click Union. Access hides the query design window, and shows the SQL view object tab. At this point, the SQL view object tab is empty. Click the tab for the first select query that you want to combine in the union query. Copy the SQL statement for the select query.
Click the tab for the union query that you started to create earlier. Click the tab for the next select query that you want to combine in the union query. Repeat steps 5 through 10 until you have copied and pasted all of the SQL statements for the select queries into the SQL view window of the union query. Do not delete the semicolon or type anything following the SQL statement for the last select query.
The results of your union query appear in Datasheet view. Here is an example that you can recreate in the Northwind sample database. This union query collects the names of people from the Customers table and combines them with the names of people from the Suppliers table. If you’d like to follow along, work through these steps in your copy of the Northwind sample database. Here are the steps necessary to build this example:.
Create two select queries called Query1 and Query2 with the Customers and Suppliers tables respectively as data sources. Use First Name and Last Name fields as display values. Create a new query called Query3 with no data source initially and then click the Union command on the Design tab to make this query into a Union query.
You can then check your results in datasheet view. Notice that in Query3, the union query, when the ordering is about to be appended, first the semicolons are removed, then the table name from the field names. The final SQL that combines and sorts the names for this union query example is the following:. However, you might find it useful to follow the approach of copying and pasting SQL from other query objects. Each query can be much more complicated than the simple select query examples used here.
It can be to your advantage to create and test each query carefully before combining them in the union query. If the union query fails to run, you can adjust each query individually until it succeeds and then rebuild your union query with the corrected syntax.
Review the remaining sections of this article to learn more tips and tricks about using union queries. In the example from the previous section using the Northwind database, only data from two tables are combined. However, you can combine three or more tables very easily in a union query. For example, building on the previous example, you might want to also include the names of the employees in the query output. If you want that field to indicate if a person is an in-house employee, from a supplier, or from a customer, you can include a fixed value in place of the company name.
Here’s how the SQL would look like:. The query above can be reduced even further since Access only reads the names of the output fields from the first query in a union query.
Here you see we’ve removed the output from the second and third query sections:. In an Access union query, ordering is allowed only once but each query can be filtered individually.
Building on the previous section’s union query, here’s an example of where we’ve filtered each query by adding a WHERE clause. If the queries to union are very different, you might encounter a situation where an output field must combine data of different data types.
If so, the union query most often will return the results as a text data type since that data type can hold both text and numbers. To understand how this works, we’ll use the Product Transactions union query in the Northwind sample database. Open that sample database and then open the Product Transactions query in datasheet view.
The last ten records should be similar to this output:. Let’s assume you want the Quantity field split into two – Buy and Sell. Let’s also assume you want to have a fixed zero value for the field with no value. Here’s how the SQL will look for this union query:. If you switch to datasheet view, you’ll see the last ten records now displayed like the following:. Continuing this example, what if you want the fields with zero to be empty?
You can modify the SQL to display nothing instead of zero by adding in the Null keyword like the following:.
However, as you might have observed switching to datasheet view, you now have an unexpected result. In the Buy column, every field is cleared:. The reason this happens is because Access determines the data types of the fields from the first query. In this example, Null is not a number. So what happens if you try and insert an empty string for the blank value of fields? The SQL for this attempt might look like the following:. When you switch to datasheet view, you’ll see that Access retrieves the Buy values, but it converted the values to text.
You can tell these are text values since they are left-aligned in the datasheet view. The empty string in the first query is not a number which is why you see these results. You’ll also notice that the Sell values are also converted to text because the purchase records contain an empty string. A solution is to force the query to expect the field value to be a number. That can be accomplished with the expression:.
The condition to check, False , will never be True , thus the expression will always return Null , but Access still evaluates both output options and decides the output to be numeric or Null.
An alternative method to achieve the same result is to prepend the queries in the union query with yet another query:. For each field, Access returns fixed values of the data type you define.
Microsoft has released an update for Microsoft Access Bit Edition. This update provides the latest fixes to Microsoft Access Bit Edition.
Additionally, this update contains stability and performance improvements. Details Version:. File Name:. Date Published:. File Size:. System Requirements Supported Operating System. Install Instructions To start the download, click the Download button and then do one of the following, or select another language from Change Language and then click Change.
Microsoft access 2016 union query free download. Union vs. Union All Query Syntax for SQL Server and Microsoft Access
The same would go for the following statements where ‘query2’ would be replaced by the name of the 2nd query and ‘query3’ by the name of the 3rd? Connect with Us. Quality Promise Newsletters. A join is also created if there are fields that clearly correspond to each other.
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The purpose of the SQL UNION and UNION ALL commands are to combine the results of two or more queries into a single result set consisting of all the rows. I’m using Office I have an Access Database that I’ve worked on for the past couple weeks, and I finally have a query that reports what. Use joins in Access queries to combine records from different data sources so that each pair of records from the sources becomes one record in the query.