DBMS in Oracle_ output. put_ How to use line

Oracle in dbms_output.put_line How do you use it?

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dbms_output.put_line Usage of

The knowledge points involved are as follows ：

1、enable：

stay serveroutput on Under the circumstances , Used to make dbms_output take effect ( Open by default )

set serveroutput on -- take output  Service open 

2、disable：

stay serveroutput on Under the circumstances , Used to make dbms_output invalid

set serveroutput off -- take output  Service closing 

3、put：

Write content to memory , wait until put_line Output together ,new_line You can also output .

begin  dbms_output.put_line('hello world1111111');  dbms_output.new_line();  dbms_output.put('Hello, Lao An ');  dbms_output.put('Hello, Lao An ');  dbms_output.new_line();  dbms_output.put_line('Hello, Lao An ');end;/

Output ：

4、put_line：

Needless to say , The output characters , And refresh buffer, Premise is set severoutput on;

exec dbms_output.put_line('hello world1111111');

5、new_line：

As the end of a line , It can be understood as writing buffer Line break at

set serveroutput onbegin  dbms_output.put_line('hello world1111111');  dbms_output.put('Hello, Lao An');  dbms_output.new_line();  dbms_output.put_line('Hello, Lao An');end;/

It uses begin+/ To execute PL/SQL The process , Let me explain oracle Middle slash (/) The meaning of

The slash is to make The server Execute the previously written sql Script . If it's normal select sentence , A semicolon , You can do it . But if it's a stored procedure , Then meet a semicolon , You can't do it right away . This is the time , You need to pass the slash (/) To execute .

6、get_line(value, index)：

Get the single line information of the buffer .

notes ： Use get_line You can't use put_line Output , because put_line After that will be buffer Empty .( Of course. serveroutput off Under the circumstances put_line It doesn't affect buffer Of ).

7、get_lines(array, index)：

Get the multi line information of the buffer in the form of an array

declare   v_data dbms_output.chararr;   -- Declare local variables first                           v_numlines number;                                   begin                                                  --enable the buffer first.                             dbms_output.enable(1000000);   -- Set the size of the buffer                                                                                dbms_output.put_line('line one');                       dbms_output.put_line('line two');                       dbms_output.put_line('line three');                                                                          v_numlines := 3;                                       dbms_output.get_lines(v_data, v_numlines);  --array, index           for v_counter in 1..v_numlines loop                        dbms_output.put_line(v_data(v_counter));               end loop;                                           end;                                                /

  Output ：

Here we are , About “Oracle in dbms_output.put_line How do you use it? ” That's the end of my study , I hope we can solve your doubts . The combination of theory and practice can better help you learn , Let's try ！ If you want to continue to learn more related knowledge , Please continue to pay attention to Yisu cloud website , Xiaobian will continue to strive to bring you more practical articles ！