How many types of sequential control statements are there in PL SQL?

What are sequential control statements?

The loop statements are the basic LOOP , FOR LOOP , and WHILE LOOP . The EXIT statement transfers control to the end of a loop. … The sequential control statements are GOTO , which goes to a specified statement, and NULL , which does nothing.

What are the control statements in SQL?

Control statements are SQL statements that allow SQL to be used as a structured programming language. SQL control statements provide the capability to control the logic flow, declare and set variables, and handle warnings and exceptions.

What is sequential statement example?

The sequential domain is represented by a process or subprogram that contains sequential statements. … As examples some basic combinational and sequential circuits are described, such as multiplexers, decoders, flip-flops, regis- ters, and counters.

What is sequential statement explain with example?

Sequential statements are. assignment statements that assign values to variables and signals. flow control statements that conditionally execute statements (if and case), repeat statements (for…loop), and skip statements (next and exit).

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What is control structures in database?

PL/SQL Control Structures are used to control flow of execution. PL/SQL provides different kinds of statements to provide such type of procedural capabilities. These statements are almost same as that of provided by other languages.

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 are the different conditional statements used in PL SQL?

PL/SQL has three types of conditional control: IF, ELSIF, and CASE statements.

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.

What are the types of loops in PL SQL?

There are 4 types of PL/SQL Loops.

  • Basic Loop / Exit Loop.
  • While Loop.
  • For Loop.
  • Cursor For Loop.

How do you use a while loop in PL SQL?

Example of PL/SQL While Loop

  2. i INTEGER := 1;
  3. BEGIN.
  4. WHILE i <= 10 LOOP.
  6. i := i+1;
  7. END LOOP;
  8. END;

How do you write a trigger?

create trigger [trigger_name]: Creates or replaces an existing trigger with the trigger_name. [before | after]: This specifies when the trigger will be executed. {insert | update | delete}: This specifies the DML operation. on [table_name]: This specifies the name of the table associated with the trigger.

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How many types of unconditional statements are there?

In C Programming Language, There are four types of unconditional control transfer statements.

Is process a control statement?

In the process of a program execution, the execution order of each statement has a direct impact on the results of the program. Moreover, many times we need to control the execution order of statements to achieve the function we want. …

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