Technical Development - Tiveloper.

You can remove existing rows from a table by using the DELETE statement: DELETE[FROM]table [WHEREcondition]; If no rows are deleted, the message "0 rows deleted" is returned. DELETEFROM departments WHEREdepartment_name = 'Finance';

You can remove existing rows from a table by using the DELETE statement: DELETE[FROM]table [WHEREcondition]; If no rows are deleted, the message "0 rows deleted" is returned. DELETEFROM departments WHEREdepartment_name = 'Finance';

UPDATEtable SETcolumn = value [, column=value, ..] [WHEREcondition];

UPDATEtable SETcolumn = value [, column=value, ..] [WHEREcondition];

INSERT INTO table[(column[,column...])] VALUES (value [,value...]);With this syntax, only one row is inserted at a time.

INSERT INTO table[(column[,column...])] VALUES (value [,value...]);With this syntax, only one row is inserted at a time.

column set_order NOPRINT select job_id,department_id,3 set_order from employees where department_id = 20 union select job_id,department_id,1 set_order from employees where department_id = 10 union select job_id,department_id,2 set_order from employees where department_id = 50 order by set_order

column set_order NOPRINT select job_id,department_id,3 set_order from employees where department_id = 20 union select job_id,department_id,1 set_order from employees where department_id = 10 union select job_id,department_id,2 set_order from employees where department_id = 50 order by set_order

COLUMN a_dummy NOPRINT SELECT 'sing' AS "My Dream", 3 a_dummy FROM dual UNION SELECT 'I''d like to teach', 1 a_dummy FROM dual UNION SELECT 'the world to', 2 a_dummy FROM dual ORDER BY a_dummy; ORDER BY clause can be used only once in a compound query and it should be placed at the very end of the query. COLUMN : You can use this command to customized column headings.

COLUMN a_dummy NOPRINT SELECT 'sing' AS "My Dream", 3 a_dummy FROM dual UNION SELECT 'I''d like to teach', 1 a_dummy FROM dual UNION SELECT 'the world to', 2 a_dummy FROM dual ORDER BY a_dummy; ORDER BY clause can be used only once in a compound query and it should be placed at the very end of the query. COLUMN : You can use this command to customized column headings.