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SQL Anywhere 11.0.1 (Français) » SQL Anywhere Server - SQL Reference » Using SQL » SQL language elements

 

Expressions

An expression is a statement that can be evaluated to return values.

Syntax
expression:
 case-expression
| constant
| [correlation-name.]column-name
| - expression
| expression operator expression
| ( expression )
| function-name ( expression, ... )
| if-expression
| special value
| ( subquery )
| variable-name
Parameters
case-expression:
CASE expression
WHEN expression
THEN expression,...
[ ELSE expression ]
END
alternative form of case-expression:
CASE
WHEN search-condition
THEN expression, ...
[ ELSE expression ]
END
constant:
 integer  | number  | string | host-variable
special-value:
 CURRENT { DATE  |  TIME  |  TIMESTAMP  }
| NULL
| SQLCODE
| SQLSTATE
| USER
if-expression:
IF condition
THEN expression
[ ELSE expression ]
ENDIF
operator:
{  +  |  -  |  *  |  /  |  ||  |  % }
Remarks

Expressions are used in many different places.

Expressions are formed from several different kinds of elements. These are discussed in the sections on functions and variables. See SQL functions, and Variables.

You must be connected to the database in order evaluate expressions.

Side effects

None.

See also
Standards and compatibility
  • See the separate descriptions of each class of expression, in the following sections.


Constants in expressions
Column names in expressions
Subqueries in expressions
IF expressions
CASE expressions
Regular expressions overview
Regular expressions syntax
Regular expression examples
Compatibility of expressions