Write access query in vba

Remember to surround date values with the character so that Access can distinguish between date values and text strings. You can also use the Between operator to filter for a range of values, including the end points.

Write access query in vba

write access query in vba

Different developers have their own ways of doing things and this is reflected in their coding style. What you will see here is the way I like to write my code.

SQL statements can also be quite long, and for that reason they are usually assigned to text variables so that they are easier to handle. Access doesn't care if you do this or not but you will find your code much easier to read and understand if you do.

Compare these two statements: Lastname from tblStaff where tblStaff. Access only demands that you do this when your field names contain spaces. The brackets tell Access that all the words in the field name belong together.

They also tell Access that "this is a field name" and so allows you to use otherwise reserved words for the names of fields such as [Date] which is also the name of a function without causing conflicts.

But I do this for another reason too. I know that if I see some text in square brackets I know it's a field name, whether it has spaces in it or not This makes long statements much easier to read and edit Don't forget that each line must have both opening and closing quotes. The statement itself needs to be enclosed in quotes because it is a VBA text string.

If you use the same type of quote mark for each Access will get confused. Look at this example Compare the two examples below. In the first example the VBA sees two text strings enclosed by double quote marks, and between them a word it doesn't know Paris so it generates an error.

But when the quote marks are alternated as shown in the second example, the problem doesn't arise. The VBA sees a text string enclosed by double quotes, inside which is some more text enclosed in single quotes.

I working with multiple sets of quotes gets confusing, you can always use the ASCII character code for the double quote mark - Chr 34 - instead. There is an example of this in the next section.

Putting It All Together Some of these rules are essential, others are just my way of doing things and that of many other database developers.

The illustration below shows a completed SQL statement written the way I suggest [click the thumbnail to see a full-sized image]: But this won't often be the case.

You might be changing the criteria, fields or even data sources specified in your SQL statements each time the code is run. The information that the SQL statement needs is often obtained from the user through their choices in a dialog box or from the values in fields on a form.

Forthcoming tutorials in this series will show how this can be done. You want to allow the user to choose a value for the Office criteria each time the query is run, so you build a dialog box in which there is a combo box containing a list of Offices.

The combo box is named cboOffice.

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You can insert a reference to the value of the combo box directly into the SQL statement: Alternatively, you can place the value of the combo box into a variable and then insert the variable into the SQL statement: Using a variable can make the SQL statement code easier to read and understand, especially when there are several variable criteria to consider.

It is sometimes essential to use this method when the value has to be examined or manipulated in some way before it is passed to the SQL. Whatever method you choose, you must remember to include any necessary data type qualifiers in the SQL string.

In the illustration below, a single quote mark is included in the SQL string either side of the text variable marked with red arrows: This method requires more typing but avoids conflicts and confusion arising from nesting quotes. Remember that as with "hard-coded" criteria, variables require the correct qualifiers for their data type: It might be because you made a logic error, or got the SQL syntax wrong, or perhaps you just made a typo.With VBA you can use the Microsoft Excel Application object to create an Excel spreadsheet from Access.

The Excel application object is the entry point to the rest of the object model. Export data faster to Excel by saving data directly to an Excel spreadsheet. Jun 27,  · However, I don't quite understand how this code shows me how to use VBA codes to insert the criteria from Excel into the Access query (probably my fault).

It seems like that code is for moving things between Access tables, rather than between two different applications. Apr 17,  · Sample 4 adds the records in bulk by attaching the Excel table to an Access database and running an append query (or INSERT leslutinsduphoenix.com FROM) to append records from a table in the Access table to the Excel table.

Create a simple select query. Create a select query in an Access web app. Creating a select query in an Access web app is similar to the procedure above for desktop databases, with just a little extra bit of work to make the query results available in the browser.

Jan 07,  · First, I create a Query in Access, and save it as "qryCustom" 2, Now, I wish to read the Query "qryCustom" SQL Text in VBA code, then I can modify the SQL Text for other purpose. 3, If need, I wish I can update the original Query with new SQL Text.

Access and SQL Part 2: Putting VBA and SQL Together. In the first tutorial in this series on Access and SQL I explained where SQL fitted into the overall Access picture.

This second tutorial introduces some SQL basics, those essential rules you really need to know when working with SQL in .

How to use VBA to Read/Write a Access Query