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This is one of a set of articles about Access SQL. This article describes the basic use of SQL to select data, and uses examples to illustrate SQL syntax. In this article. What is SQL? Basic SQL clauses: SELECT, FROM, and WHERE. Sorting the results: ORDER BY. Working with summarized data: GROUP BY and HAVING. Combining query results: UNION ...
22 Μαρ 2022 · Applies to: Access 2013 | Office 2013. Instructs the Microsoft Access database engine to return information from the database as a set of records. Syntax. SELECT [predicate] { * | table.* | [table.]field1 [AS alias1] [, [table.]field2 [AS alias2] [, …]]} FROM tableexpression [, …] [IN externaldatabase] [WHERE… ] [GROUP BY… ] [HAVING…
21 Σεπ 2021 · Applies to: Access 2013, Office 2013. Overview of the Access SQL reference; Data definition language (DDL) Data manipulation language; Windows registry settings for external data sources
14 Ιουν 2022 · Use the CREATE TABLE statement to define a new table and its fields and field constraints. If NOT NULL is specified for a field, new records are required to have valid data in that field. A CONSTRAINT clause establishes various restrictions on a field, and can be used to establish the primary key.
This article describes how to write a SELECT clause, and uses examples to illustrate various techniques that you can use when you write them. For an overview of Access SQL, see the article Access SQL: basic concepts, vocabulary, and syntax.
You can use a different name to refer to a table in a SELECT statement by using a table alias in your FROM clause. A table alias is a name that you assign to a data source in a query when you use an expression as a data source, or to make the SQL statement easier to type and read.
An expression is a combination of mathematical or logical operators, constants, functions, table fields, controls, and properties that evaluates to a single value. You can use expressions in Access to calculate values, validate data, and set a default value. In this article.
