Best answer: Can SQL take user input?

What is the syntax for accepting user input in Plsql?

Here is the syntax of taking input from the user: :=:; Just by writing only this statement we will able to take input from user. declare i integer; j integer; s integer; begin i:=:i; —–observe this statement.

How do you input a loop in PL SQL?

10 LOOP INSERT INTO TAB (col1, col2, col3, col4, col5) VALUES (num1, num2, num3, num4, num5); END LOOP; COMMIT; END; / Enter value for num1: 1 old 2: num1 NUMBER (10) := &num1; new 2: num1 NUMBER (10) := 1; Enter value for num2: 2 old 3: num2 NUMBER (10) := &num2; new 3: num2 NUMBER (10) := 2; Enter value for num3: 3 …

What is set Serveroutput on?

Basically the use of SET SERVEROUTPUT is to display the query answer in SQL *PLUS interface… When you use the DBMS_OUTPUT. PUT_LINE procedure, the procedure will write the passing string into the Oracle buffer. … Use the “Set serveroutput on” to display the buffer used by dbms_output.

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Which command is used to get input from the user?

The scanf statement in the c programming language is used to accept the data from the user during the program execution.

How do I prompt a user in SQL?

Procedure

  1. Open the SQL tab. Note: You can specify a prompt in the Conditions column on the Build tab of the query editor.
  2. Write a condition with a variable that is marked by an ampersand (&) character.
  3. Type the name of the prompt after the ampersand.

What are SQL parameters?

Parameters are used to exchange data between stored procedures and functions and the application or tool that called the stored procedure or function: Input parameters allow the caller to pass a data value to the stored procedure or function. … User-defined functions cannot specify output parameters.

What is procedure in PL SQL with example?

Procedure Vs. Function: Key Differences

Procedure Function
Used mainly to a execute certain process Used mainly to perform some calculation
Cannot call in SELECT statement A Function that contains no DML statements can be called in SELECT statement
Use OUT parameter to return the value Use RETURN to return the value

What is for loop in PL SQL?

PL/SQL for loop is used when when you want to execute a set of statements for a predetermined number of times. The loop is iterated between the start and end integer values. The counter is always incremented by 1 and once the counter reaches the value of end integer, the loop ends.

How do you create a loop?

for loop in C

  1. The init step is executed first, and only once. This step allows you to declare and initialize any loop control variables. …
  2. Next, the condition is evaluated. …
  3. After the body of the ‘for’ loop executes, the flow of control jumps back up to the increment statement. …
  4. The condition is now evaluated again.
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How many types of variable scope are present in PL SQL?

Variable Scope in PL/SQL:

There are two types of variable scope: Local Variable: Local variables are the inner block variables which are not accessible to outer blocks. Global Variable: Global variables are declared in outermost block.

What is set Trimspool on?

SET TRIMOUT ON or SET TRIMSPOOL ON removes trailing blanks at the end of each displayed or spooled line. Setting these variables ON can reduce the amount of data written. However, if LINESIZE is optimal, it may be faster to set the variables OFF.

How do you display output in PL SQL?

To do this we use a procedure called dbms_output. put_line to place the results in a buffer that SQL*Plus will retrieve and display. SQL*Plus must be told to retrieve data from this buffer in order to display the results. The SQL*Plus command ‘set serveroutput on’ causes SQL*Plus to retrieve and display the buffer.

How does an execution block start and end in PL SQL?

A PL/SQL block has an executable section. An executable section starts with the keyword BEGIN and ends with the keyword END . The executable section must have a least one executable statement, even if it is the NULL statement which does nothing.