String Operators : Operators « PL SQL Operators « Oracle PL/SQL Tutorial

Oracle PL/SQL Tutorial
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Oracle PL/SQL Tutorial » PL SQL Operators » Operators 
23. 1. 11. String Operators

PL/SQL has two operators specifically designed to operate only on character string data.

These are the LIKE operator and the concatenation (||) operator.

The Syntax for the Concatenation Operator:

string_1 || string_2

string_1 and string_2 are both character strings and can be string constants, string variables, or string expressions.

SQL>
SQL> SET SERVEROUTPUT ON
SQL>
SQL> DECLARE
  2    a     VARCHAR2(30);
  3    b     VARCHAR2(30);
  4    c     VARCHAR2(30);
  5  BEGIN
  6    c := 'A' || ' AND ' |'B';
  7    DBMS_OUTPUT.PUT_LINE(c);
  8     a := ' C ';
  9     b := ' D ';
 10     DBMS_OUTPUT.PUT_LINE(a || ' ' || b || ',');
 11     a := ' E ';
 12     b := ' F';
 13     c := a || b;
 14     DBMS_OUTPUT.PUT_LINE(c);
 15  END;
 16  /
A AND B
C   D ,
E  F

PL/SQL procedure successfully completed.

SQL>
23. 1. Operators
23. 1. 1. Operators
23. 1. 2. The basic arithmetic operators in action
23. 1. 3. Logical Operators in PL/SQL
23. 1. 4. Running Anonymous Blocks of Code
23. 1. 5. Arithmetic Operators
23. 1. 6. Exponentiation
23. 1. 7. The negation and identity operators in action.
23. 1. 8. Comparison Operators
23. 1. 9. The Relational Operators: =, <>, !=, ~=, <, >, <=, >=
23. 1. 10. Logical Operators
23. 1. 11. String Operators
23. 1. 12. Use of Comparison Operators with Strings
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