Oracle sqlplus Statement Edit command

oracle| Statement First we enter such an instruction: SELECT emp_id, Emp_name
The From Employeesinput command can then add a statement after the previous instruction, such as after the statement is run: input where emp_age > 30 can get the following instruction: SELECT emp_id, Emp_name
From Employees
The WHERE emp_age > Ln command is used to specify an action on the nth line of input, such as after the statement is run: L1 the currently selected statement line is select emp_id, Emp_name (with "*" before the statement) a command is used to add characters directly to the end of the current line, such as after the above statement is run: A, emp_dept the execution of the instruction into: SELECT emp_id, Emp_name, emp_dept
From Employees
WHERE emp_age > 30
The C command is used to modify the characters in the current statement, such as when the above statement is run: c/emp_name/emp_age/the command to execute becomes: SELECT emp_id, Emp_age, emp_dept
From Employees
WHERE emp_age > 30
The del n command is used to delete the nth line of instructions, such as entering after the statement is run: Del 3 the command that is executed becomes: SELECT emp_id, Emp_age, emp_dept
From Employees