Construct Simple Queries

Use Queries to Filter Database Information

Use SQL Queries

 

AutoCAD 2008 User's Guide > Share Data Between Drawings and Applications > Access External Databases > Use Queries to Filter Database Information > 

Use the Query Builder

Concept

Procedure

Quick Reference

Boolean operators and parenthetical grouping are used to create queries with two or more search criteria.

The Query Builder tab is the primary query environment. Unlike the Quick Query and Range Query tabs, the Query Builder can be used to create queries based on multiple criteria. You can also parenthetically group criteria and specify what fields are displayed and how they are sorted when the query is returned in the Data View window.

The Query Builder tab introduces Boolean operators and parenthetical grouping, which are used to create compound queries based on two or more search criteria. For example, using Boolean operators, you can generate a query that returns a list of all light fixtures of a given type that were installed after a specific date.

• And Operator. Constructs a query based on multiple criteria, returning a set of records that meet all specified criteria. For example, search for all rooms that are offices and are currently unoccupied. The query returns records for all rooms that are both offices and unoccupied.
• Or Operator. Constructs a query based on multiple criteria, returning a set of records that meet any of the specified criteria. For example, search for all rooms that are offices or are currently unoccupied. The query returns records for all rooms that are either offices or unoccupied.
• Parenthetical Grouping. Groups a series of search criteria by bracketing them within parentheses. For example, search for

  (All rooms that are offices and are currently unoccupied)

  or

  (All rooms that are cubicles and are currently unoccupied)

  This query returns a list of all unoccupied offices and cubicles.

  You can nest up to four sets of parentheses within a statement.