plsql.sql

hsql是很有名的嵌入式数据库

/*
 * $Id: plsql.sql,v 1.3 2005/05/02 15:09:11 unsaved Exp $
 *
 * This example is copied from the "Simple Programs in PL/SQL"
 * example by Yu-May Chang, Jeff Ullman, Prof. Jennifer Widom at
 * the Standord University Database Group's page
 * http://www-db.stanford.edu/~ullman/fcdb/oracle/or-plsql.html .
 * I have only removed some blank lines (because you can't use blank
 * lines inside of SQL commands in non-raw mode SqlTool when running
 * it interactively); and, at the bottom I have  replaced the
 * client-specific, non-standard command "run;" with SqlTool's
 * corresponding command ":;" and added a plain SQL SELECT command
 * to show whether the PL/SQL code worked.  - Blaine
 */

CREATE TABLE T1(
    e INTEGER,
    f INTEGER
);

DELETE FROM T1;

INSERT INTO T1 VALUES(1, 3);

INSERT INTO T1 VALUES(2, 4);

/* Above is plain SQL; below is the PL/SQL program. */
DECLARE

    a NUMBER;

    b NUMBER;

BEGIN

    SELECT e,f INTO a,b FROM T1 WHERE e>1;

    INSERT INTO T1 VALUES(b,a);

END;

.

/**************************************************************************/
/* Remaining SqlTool-specific code added by Blaine Simpson of the 
 * HSQLDB Development Group.
 */

:;

/* This should show 3 rows, one containing values 4 and 2 (in this order)...*/
SELECT * FROM t1;