What kind of sql does microsoft access use

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Now live: A fully responsive profile. Related 1. Thus, allowing it to hold increasing amounts of data without sacrificing performance. Concurrent Users: Access has a limitation of simultaneous users. Whereas other SQL databases can handle over 32, users at one time.

Usability: Access is an excellent application for creating modest databases or for users who may not be familiar with technical language. SQL databases are much more technical but have far more capacity. However, there is considerable variation in the adherence to this standard. One of the points of comparison in the linked page is whether or not there is automatic casting of values. All this is getting at is what happens if the developer tries to concatenate a string with some other data type say, a number.

The following table lists types of SQL terms. A combination of identifiers, operators, constants, and functions that evaluates to a single value. Access ignores line breaks in a SQL statement. However, consider using a line for each clause to help improve the readability of your SQL statements for yourself and others.

The semi-colon can appear at the end of the last clause or on a line by itself at the end of the SQL statement. The following illustrates what a SQL statement for a simple select query might look like in Access:. This example SQL statement reads "Select the data that is stored in the fields named E-mail Address and Company from the table named Contacts, specifically those records in which the value of the field City is Seattle.

If an identifier contains spaces or special characters such as "E-mail Address" , it must be enclosed in square brackets. A SELECT clause does not have to say which tables contain the fields, and it cannot specify any conditions that must be met by the data to be included. More information about how you use these clauses is presented in these additional articles:. Like Microsoft Excel, Access lets you sort query results in a datasheet.

An ORDER BY clause contains a list of the fields that you want to use for sorting, in the same order that you want to apply the sort operations.

For example, suppose that you want your results sorted first by the value of the field Company in descending order, and — if there are records with the same value for Company — sorted next by the values in the field E-mail Address in ascending order. Note: By default, Access sorts values in ascending order A-Z, smallest to largest.

Use the DESC keyword to sort values in descending order instead. Sometimes you want to work with summarized data, such as the total sales in a month, or the most expensive items in an inventory. For example, if you want your query to show the count of e-mail addresses listed for each company, your SELECT clause might resemble the following:.

The aggregate functions that you can use depend on the type of data that is in the field or expression that you want to use. For more information about the available aggregate functions, see the article SQL Aggregate Functions.

If you want to use criteria to limit your results, but the field that you want to apply criteria to is used in an aggregate function, you cannot use a WHERE clause.