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Sample sql databases microsoft access1/26/2024 To describe a set of data by using SQL, you write a SELECT statement. For more information, see the article Create or modify tables or indexes by using a data-definition query. The part of SQL that is used for creating and altering database objects is called data-definition language (DDL). Note: SQL is not only used for manipulating data, but also for creating and altering the design of database objects, such as tables. SQL syntax is based on English syntax, and uses many of the same elements as Visual Basic for Applications (VBA) syntax.įor example, a simple SQL statement that retrieves a list of last names for contacts whose first name is Mary might resemble this: SELECT Last_Name Syntax is the set of rules by which the elements of a language are correctly combined. When you use SQL, you must use the correct syntax. You use SQL to describe sets of data that can help you answer questions. Like many computer languages, SQL is an international standard that is recognized by standards bodies such as ISO and ANSI. Unlike many computer languages, SQL is not difficult to read and understand, even for a novice. Relational database programs, such as Microsoft Office Access, use SQL to work with data. SQL is a computer language for working with sets of facts and the relationships between them. Working with summarized data: GROUP BY and HAVING In this articleīasic SQL clauses: SELECT, FROM, and WHERE This article describes the basic use of SQL to select data, and uses examples to illustrate SQL syntax. This is one of a set of articles about Access SQL. Understanding how SQL works can help you create better queries, and can make it easier for you to understand how to fix a query that is not returning the results that you want. Every query that you run uses SQL behind the scenes. SQL is a computer language that closely resembles English, but that database programs understand. When you want to retrieve data from a database, you ask for the data by using Structured Query Language, or SQL.
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