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Categories / Oracle PLSQL Tutorial / Character String Functions

 

Change book title to upper case if it is not

SQL> SQL> CREATE TABLE employee_evaluation (   2  id              number,   3  title           varchar2(100),   4  written_date    date ); Table created. SQL> SQL> INSERT INTO employee_evaluation(id,title,written_date)VALUES(100,'SQL',to_date('19700101', 'YYYYMMDD') ); 1 row created. SQL> INSERT INTO employee_evaluation(id,title,written_date)VALUES(100,'Java',to_date('19900101', 'YYYYMMDD') ); 1 row created. SQL> INSERT INTO employee_evaluation(id,title,written_date)VALUES(200,'C++',to_date('20030101', 'YYYYMMDD') ); 1 row created. SQL> INSERT INTO employee_evaluation(id,title,written_date)VALUES(200,'C',to_date('20000101', 'YYYYMMDD') ); 1 row created. SQL> INSERT INTO employee_evaluation(id,title,written_date)VALUES(200,'Oracle',to_date('20020101', 'YYYYMMDD') ); 1 row created. SQL> INSERT INTO employee_evaluation(id,title,written_date)VALUES(200,'Theory',to_date('20050101', 'YYYYMMDD') ); 1 row created. SQL> INSERT INTO employee_evaluation(id,title,written_date)values(300,'Third',to_date('20000101', 'YYYYMMDD')   2  INSERT INTO employee_evaluation(id,title,written_date)values(300,'Data',to_date('20020101', 'YYYYMMDD')   3 SQL> select * from employee_evaluation;     ID TITLE                                                                                             WRITTEN_DATE ------ ---------------------------------------------------------------------------------------------------- ----------------    100 SQL                                                                                                19700101 000000    100 Java                                                                                               19900101 000000    200 C++                                                                                                20030101 000000    200 C                                                                                                  20000101 000000    200 Oracle                                                                                             20020101 000000    200 Theory                                                                                             20050101 000000 6 rows selected. SQL> SQL> UPDATE employee_evaluation   2  SET    title = upper(title)   3  where  title <> upper(title); 3 rows updated. SQL> SQL> select * from employee_evaluation;     ID TITLE                                                                                             WRITTEN_DATE ------ ---------------------------------------------------------------------------------------------------- ----------------    100 SQL                                                                                                19700101 000000    100 JAVA                                                                                               19900101 000000    200 C++                                                                                                20030101 000000    200 C                                                                                                  20000101 000000    200 ORACLE                                                                                             20020101 000000    200 THEORY                                                                                             20050101 000000 6 rows selected. SQL> SQL> drop table employee_evaluation; Table dropped. SQL>