Mega Code Archive

A conditional statement

SQL> SQL> SQL> CREATE TABLE lecturer ( 2 id NUMBER(5) PRIMARY KEY, 3 first_name VARCHAR2(20), 4 last_name VARCHAR2(20), 5 major VARCHAR2(30), 6 current_credits NUMBER(3) 7 ); Table created. SQL> SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits) 2 VALUES (10001, 'Scott', 'Lawson','Computer Science', 11); 1 row created. SQL> SQL> INSERT INTO lecturer (id, first_name, last_name, major, current_credits) 2 VALUES (10002, 'Mar', 'Wells','History', 4); 1 row created. SQL> SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits) 2 VALUES (10003, 'Jone', 'Bliss','Computer Science', 8); 1 row created. SQL> SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits) 2 VALUES (10004, 'Man', 'Kyte','Economics', 8); 1 row created. SQL> SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits) 2 VALUES (10005, 'Pat', 'Poll','History', 4); 1 row created. SQL> SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits) 2 VALUES (10006, 'Tim', 'Viper','History', 4); 1 row created. SQL> SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits) 2 VALUES (10007, 'Barbara', 'Blues','Economics', 7); 1 row created. SQL> SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits) 2 VALUES (10008, 'David', 'Large','Music', 4); 1 row created. SQL> SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits) 2 VALUES (10009, 'Chris', 'Elegant','Nutrition', 8); 1 row created. SQL> SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits) 2 VALUES (10010, 'Rose', 'Bond','Music', 7); 1 row created. SQL> SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits) 2 VALUES (10011, 'Rita', 'Johnson','Nutrition', 8); 1 row created. SQL> SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits) 2 VALUES (10012, 'Sharon', 'Clear','Computer Science', 3); 1 row created. SQL> SQL> CREATE TABLE MyTable ( 2 num_col NUMBER, 3 char_col VARCHAR2(60) 4 ); Table created. SQL> SQL> SQL> SQL> DECLARE 2 v_Totallecturer NUMBER; 3 BEGIN 4 SELECT COUNT(*) 5 INTO v_Totallecturer 6 FROM lecturer; 7 8 IF v_Totallecturer = 0 THEN 9 INSERT INTO MyTable (char_col) VALUES ('There are no lecturers registered'); 10 ELSIF v_Totallecturer < 5 THEN 11 INSERT INTO MyTable (char_col) VALUES ('There are only a few lecturers registered'); 12 ELSIF v_Totallecturer < 10 THEN 13 INSERT INTO MyTable (char_col) VALUES ('There are a little more lecturers registered'); 14 ELSE 15 INSERT INTO MyTable (char_col) VALUES ('There are many lecturers registered'); 16 END IF; 17 END; 18 / PL/SQL procedure successfully completed. SQL> SQL> select * from MyTable; NUM_COL CHAR_COL -------- ------------------------------------------------------------ There are many lecturers registered SQL> SQL> drop table MyTable; Table dropped. SQL> drop table lecturer; Table dropped. SQL>