Create a Query to Combine Data from Two Tables with Similar Structures - Access Cookbook [Book].
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Use a union query to combine multiple queries into a single result.Microsoft Access Union Query: Union vs. Union All Syntax |
Microsoft access 2013 union query free. Adding A Parameter In Access Query: Using A Union Query
I have written 3 different select queries within Microsoft Access Each of the select queries is made up of a different select query joined to 2 tables. The 2 tables are the same in each of the 3 select queries, but the select query within each is different. The output of each of these queries is 5 columns of data, each column within each query is the same type of date and the columns are in the same order.
I want to see all 3 of the queries merged together to see the data together so that I can further refine it. However, I continue to get errors. I am a veterinarian, not an IT person. But I try I apologize if I didn't include pieces of information to make this more understandable. Build the union query with only 2 of the query composites.
If that works then try another 2 until all combinations are checked. Was this reply helpful? Yes No. Sorry this didn't help. Each select query works well. The select queries run on their own, as do the select queries made up of a select query with the 2 tables. Each one works independently. I tried your suggestion of adding only 2 of the select queries to the union query to see if that would run.
Each combination of 2 select queries together produces the union query successfully. The problem comes when I attempt to add in the 3rd select query. I'm not sure if this will fix your issue but NAME is a reserved word so I would place brackets around it. Threats include any threat of suicide, violence, or harm to another.
Any content of an adult theme or inappropriate to a community web site. Any image, link, or discussion of nudity. Any behavior that is insulting, rude, vulgar, desecrating, or showing disrespect. Any behavior that appears to violate End user license agreements, including providing product keys or links to pirated software. Unsolicited bulk mail or bulk advertising.
Any link to or advocacy of virus, spyware, malware, or phishing sites. Any other inappropriate content or behavior as defined by the Terms of Use or Code of Conduct. Any image, link, or discussion related to child pornography, child nudity, or other child abuse or exploitation. Details required : characters remaining Cancel Submit. Rather than copy and paste the SQL from each of your queries I would just use the results of the query:.
CountofTagNumber, query1. CountofTagNumber, query2. CountofTagNumber, query3. I aligned the 2nd query to have the same way of pulling the [State Code] field as the other two. Originally it pulled the same data, just went about it a different way. Unfortunately, the change did not affect the success of the union query.
The animal. I'm not sure I fully understand how the design view translates into the SQL view Thank you for the suggestions.
I tried this, but perhaps I didn't do it correctly. I should replace all references to 'query1' above with the name of the first query correct? So each of the 6 'query1' references above would be replaced? 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?
I tried that, but in attempting to run the union, I'm asked to enter several parameter values, so it appears something went awry with this. I apologize for my limited knowledge of official terminology, I'm attempting to leverage data I need for my work with limited resources. Choose where you want to search below Search Search the Community.
Can union queries join select queries that are made up of a select query and multiple tables? This thread is locked. You can follow the question or vote as helpful, but you cannot reply to this thread. I have the same question 0. Report abuse. Details required :. Cancel Submit. QA Guy CommElec. Backup a little. Make sure each query will work alone and then joined. Screen the data to try and find results that is not right.
Thanks for your feedback. How satisfied are you with this reply? Thanks for your feedback, it helps us improve the site. Thanks for the advice. Why are you grouping on animal. Scottgem MVP. In reply to dhookom's post on October 4, I'm thinking I need to take a SQL course In reply to Scottgem's post on October 4, Those query names should also be in [brackets] as well, correct? If that is your actual error message then you have a where you should have a [. In reply to dhookom's post on October 11, Thank you all for your assistance.
Luckily, I found a date field in one query that I missed naming to match the other two. I fixed that and have been able to get the query to work. No more assistance needed. Thanks again. This site in other languages x.
Microsoft access 2013 union query free -
Sometimes you might want to list the records from one table or query with those from one or more other tables to form one set of records - a list with all the records from the two or more tables. This is the purpose of a union query in Access. To effectively understand union queries, you should first be familiar with designing basic select queries in Access.
To learn more about designing select queries, see Create a simple select query. Note: The content in this article is intended for use with Access desktop databases. You can't create or use a union query in Access web databases or Access web apps.
If you've never created a union query before, you might find it useful to first study a working example in the Northwind Access template. After Access opens the Northwind database, dismiss the login dialog form that first appears and then expand the Navigation Pane. Click the top of the Navigation Pane and then select Object Type to organize all the database objects by their type.
Next, expand the Queries group and you'll see a query called Product Transactions. Union queries are easy to differentiate from other query objects because they have a special icon that resembles two intertwined circles representing a united set from two sets:. Unlike normal select and action queries, tables are not related in a union query, which means the Access graphic query designer can't be used to build or edit union queries.
Under the Views command on the Home tab, you'll notice that Design View is not available when you work with union queries. In this illustration, we've added some extra spacing in the SQL so you can easily see the various parts that make up a union query. The first and the third parts of this SQL statement are essentially two select queries. These queries retrieve two different sets of records; one from the Product Orders table and one from the Product Purchases table.
In this example, Access will order all of the records by the Order Date field in descending order. 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. Copy the SQL statement for the select query. Click the tab for the union query that you started to create earlier. 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. 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. 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. 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. Of course, you don't want the output of this query to interfere with the results so the trick to avoid that is to include a WHERE clause to False:.
This is a little trick since this is always false and then the query doesn't return anything. Combining this statement with the existing SQL and we arrive at a completed statement as follows:. Note: The combined query here in this example using the Northwind database returns records, while the two individual queries return 58 and 43 records for a total of records. The reason for this discrepancy is because two records are not unique. A special case for a union query is to combine a set of records with one record that contains the sum of one or more fields.
Here is another example that you can create in the Northwind sample database to illustrate how to get a total in a union query. Combine these two queries into a union query to append the record with the total quantity to the purchase records:. Switch to datasheet view and you should see the four purchases with the sum of each followed by a record that totals the quantity:.
That covers the basics of adding totals into a union query. You can review using fixed values in the section Combine three or more tables or queries in a union query. Union queries in Access by default only include distinct records.
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