Click here to monitor SSC
SQLServerCentral is supported by Redgate
 
Log in  ::  Register  ::  Not logged in
 
 
 

Get your favorite SSC scripts directly in SSMS with the free SQL Scripts addin. Search for scripts directly from SSMS, and instantly access any saved scripts in your SSC briefcase from the favorites tab.
Download now (direct download link)

SQLCalcEngine - evaluate numeric expression

By Wayne Lawton,

SQLCalcEngine - evaluate numeric expression similar to the VB eval function.

The basic concept is to pass a string containing a numeric expression such as ((2+3)*(4/9)) and receive a numeric value back.

The algorithm is based loosely on material found at http://www.arstdesign.com/articles/expression_evaluation.html, as well as material found in the book "Writing Compilers and Interpreters" by Ronald Mak.

The next enhancement will be to implement two-character operators, as well as support the common SQL functions in the expressions. Look for updates to the script over the near future.

Total article views: 303 | Views in the last 30 days: 1
 
Related Articles
ARTICLE

TSQL Challenge 45 - Evaluate mathematical expressions presented using

This challenge involves evaluating mathematical expressions presented using Roman Numerals and retur...

FORUM

Expression

Expression

FORUM

Error turning Varchar into Numeric

Error turning Varchar into Numeric

FORUM

SSIS Expression Builder DT_WSTR to DT_NUMERIC Conversion

Cannot cast string to number within Expression Builder - error 0xC00470C2

FORUM

Expressions for Variables

Expressions

Tags
miscellaneous    
t-sql    
 
Contribute