Use Variables in SQL Statements in Oracle

Q

Can Variables Be Used in SQL Statements in Oracle?

✍: FYIcenter.com

A

Yes, you can use variables in SQL statements as part of any expressions. The tutorial script provides you some good examples:

(Connect to XE with SQL*Plus)

CREATE TABLE student (id NUMBER(5) PRIMARY KEY,
  first_name VARCHAR(80) NOT NULL,
  last_name VARCHAR(80) NOT NULL);
Table created.

DECLARE
  var_id NUMBER;
  var_name CHAR(10);
BEGIN
  var_id := 29;
  var_name := 'Bob';
  INSERT INTO student VALUES(var_id, var_name, 'Henry');
  var_name := 'Joe';
  INSERT INTO student VALUES(var_id+1, var_name, 'Bush');
  var_name := 'Fyi';
  UPDATE student SET first_name = var_name
    WHERE id = var_id+1;
  DELETE FROM student WHERE id = var_id;                    
END;   
/

SELECT * FROM student;
ID       FIRST_NAME  LAST_NAME   
-------- ----------- ----------- 
30       Fyi         Bush   

 

Working with Database Objects in Oracle PL/SQL

⇒⇒Oracle Database Tutorials

2016-10-17, 150👍, 0💬