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Act &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;Date &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Acct_Bal<br />
1 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 05/01/2006 &nbsp; &nbsp; &nbsp; &nbsp;1000.00<br />
1 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 05/05/2006 &nbsp; &nbsp; &nbsp; &nbsp; 3000.00<br />
1 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 05/20/2006 &nbsp; &nbsp; &nbsp; &nbsp; -500.00<br />
1 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 05/21/2006 &nbsp; &nbsp; &nbsp; &nbsp; 4000.00<br />
1 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 05/24/2006 &nbsp; &nbsp; &nbsp; &nbsp; -200.00<br />
<br />
If I want to know what is the account balance on 5/7/2009, I want the query to return 3,000.00 the value on 5/5. &nbsp;The highest value before the next change on 5/20
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Act            Date                   Acct_Bal
1               05/01/2006        1000.00
1               05/05/2006         3000.00
1               05/20/2006         -500.00
1               05/21/2006         4000.00
1               05/24/2006         -200.00

If I want to know what is the account balance on 5/7/2009, I want the query to return 3,000.00 the value on 5/5.  The highest value before the next change on 5/20

Look up a value in a table based on a date

Microsoft SQL Server 2005 is a suite of relational database management system (RDBMS) products providing multi-user database access functionality.Component services include integration (SSIS), reporting (SSRS), analysis (SSAS), data quality, master data, T-SQL and performance tuning. It includes support for managing XML data and allows a database server to be exposed over web services using Tabular Data Stream (TDS) packets encapsulated within SOAP (protocol) requests.

Microsoft SQL Server 2005

SQL (Structured Query Language) is designed to be used in conjunction with relational database products as of a means of working with sets of data. SQL consists of data definition, data manipulation, and procedural elements. Its scope includes data insert, query, update and delete, schema creation and modification, and data access control.