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Oracle9i SQL Reference
Release 2 (9.2)

Part Number A96540-02
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CONCAT

Syntax

concat::=

Text description of functions36.gif follows
Text description of concat


Purpose

CONCAT returns char1 concatenated with char2. Both char1 and char2 can be any of the datatypes CHAR, VARCHAR2, NCHAR, NVARCHAR2, CLOB, or NCLOB. The string returned is in the same character set as char1. Its datatype depends on the datatypes of the arguments.

In concatenations of two different datatypes, Oracle returns the datatype that results in a lossless conversion. Therefore, if one of the arguments is a LOB, then the returned value is a LOB. If one of the arguments is a national datatype, then the returned value is a national datatype. For example:

This function is equivalent to the concatenation operator (||).

See Also:

"Concatenation Operator" for information on the CONCAT operator

Examples

This example uses nesting to concatenate three character strings:

SELECT CONCAT(CONCAT(last_name, '''s job category is '),
      job_id) "Job" 
   FROM employees 
   WHERE employee_id = 152;
 
Job
------------------------------------------------------
Hall's job category is SA_REP