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The symbol вЂ/*вЂ™ marks the starting of the comment and the symbol вЂ*/вЂ™ marks the end of the comment.

Using вЂ/*вЂ¦вЂ¦.*/вЂ™ we can use multiple lines.

Using вЂвЂ“вЂ in the beginning of the line to comment that particular line.

In PL/SQL codes can be commented in two ways.

Sql prompt input code#

Code line 5: Printing the value of the variable вЂњtextвЂќ.Д¬ommenting code simply instructs the compiler to ignore that particular code from executing.Д¬omment can be used in the program to increase the readability of the program.

Code line 4: Assigning the value вЂњHello WorldвЂќ to the variable вЂњtextвЂќ.

Code line 2: Declaring a variable вЂњtextвЂќ of a VARCHAR2 type with size 25.

Here we are going to print the вЂњHello WorldвЂќ using the variables. Till the compiler encounters вЂ/вЂ™, it will not consider the block is completed, and it will not execute it.Дeclaring and usage of variables in the program Note: A block should be always followed by вЂ/вЂ™ which sends the information to the compiler about the end of the block.

Sql prompt input how to#

The below screenshot explains how to enter the code in SQL* Plus.Code line 2: Prints the message вЂњHello World.вЂќ.In this section, we are going to write a simple program for printing вЂњHello WorldвЂќ using вЂњAnonymous blockвЂќ. How to write a simple program using PL/SQL

Sql prompt input plus#

Now we are ready to work with the SQL* Plus tool.

We need to execute вЂњset serveroutput onвЂќ if we need to see the output of the code.

After the successful connection, the SQL plus will appear as shown below.

When we open SQL* Plus, it will prompt for the connection details as shown below. In this section, we are going to learn how to connect to SQL* Plus in Windows GUI.

It allows the user to connect to the database and execute PL/SQL commands. It has a command line user interface, Windows GUI, and web-based user interface.

Sql prompt input download#

Alternatively, you can also download it from the Oracle Technology Network (OTN) It can be found at Start > Programs > Oracle-OraHomeName > Application Development > SQL Plus. SQL* Plus is an interactive and batch query tool that is installed with every Oracle installation.

Declaring and usage of variables in the program.

How to write a simple program using PL/SQL.

Is something like this an acceptable compromise for the users:Дisconnected from Oracle Database 12c Enterprise Edition Release 12.1.0.2.In this tutorial, we will introduce SQL* Plus and learn how to connect it to the database.ДЄfter connection, we are also going to see how to write our first program вЂњHello WorldвЂќ in PL/SQL. Note that this time, I do not have to re-define 1 as it has already been done from inside the script. The closest I could get the script to work the way I wanted it to work is to add DEFINE 1 at the end of the script: Please see the outputs below:Д«ut here's the problem - it still picks up the last value, which I'd like to avoid, when there's no input. I'd like to keep the 'process' as simple as possible as it'll be run by a user who will forget how to do it in 3 days and then wonder why the script doesn't work )ДЄnyways, as you have suggested, I've pre-defined 1 before running the script. User will log into the database via SQLPlus and run the script (i.e. The script is to be run directly from SQLPlus prompt. As I've mentioned before, there's no process that calls the script. New 5: dbms_output.put_line ( 'You entered: ' || 'abc' ) Once you've done this it will keep the value until you end the session or undefine it: New 5: dbms_output.put_line ( 'You entered: ' || '' ) Дefine the variable before calling it. Old 5: dbms_output.put_line ( 'You entered: ' || '&1' ) Pass an empty string as arguments to the script:Дbms_output.put_line ( '#1 cannot be null' ) Дbms_output.put_line ( 'You entered: ' || '&1' ) To overcome this there are a couple of methods you could use:

If they're not already define it'll prompt you. To use them Oracle needs to know their values. When you 'set define on', Oracle interprets ampersands as substitution variables.