Which of the following is correct syntax to declare variable in PL SQL?

After the declaration, PL/SQL allocates memory for the variable’s value and the storage location is identified by the variable name. Syntax for declaring variable: Following is the syntax for declaring variable: variable_name [CONSTANT] datatype [NOT NULL] [:= | DEFAULT initial_value]

Which of the following is valid syntax to declare a variable in PL SQL?

General Syntax to declare a variable is

variable_name datatype [NOT NULL := value ]; variable_name is the name of the variable. datatype is a valid PL/SQL datatype.

How do you declare a variable in SQL?

Variables in SQL procedures are defined by using the DECLARE statement. Values can be assigned to variables using the SET statement or the SELECT INTO statement or as a default value when the variable is declared. Literals, expressions, the result of a query, and special register values can be assigned to variables.

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How do you declare a variable in Oracle?

How to declare variable and use it in the same Oracle SQL script?

  1. Use a DECLARE section and insert the following SELECT statement in BEGIN and END; . Acces the variable using &stupidvar .
  2. Use the keyword DEFINE and access the variable.
  3. Using the keyword VARIABLE and access the the variable.

Which of the following is the correct syntax for IF statement in Plsql?

Syntax for IF THEN Statements:

IF <condition: returns Boolean> THEN -executed only if the condition returns TRUE <action_block> END if; In the above syntax, keyword ‘IF’ will be followed by a condition which evaluates to ‘TRUE’/’FALSE’. The control will execute the <action_block> only if the condition returns <TRUE>.

What is a correct variable name?

Rules for defining variables

A variable can have alphabets, digits, and underscore. A variable name can start with the alphabet, and underscore only. It can’t start with a digit. No whitespace is allowed within the variable name. A variable name must not be any reserved word or keyword, e.g. int, goto , etc.

How do you declare a variable of a table in PL SQL?

Declare TABLE TYPE variables in a PL/SQL declare block. Table variables are also known as index-by table or array. The table variable contains one column which must be a scalar or record datatype plus a primary key of type BINARY_INTEGER.

How do you DECLARE a variable?

To declare a variable is to create the variable. In Matlab, you declare a variable by simply writing its name and assigning it a value. (e.g., ‘jims_age = 21;’). In C, Java you declare a variable by writing its TYPE followed by its name and assigning it a value.

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Is the right syntax of creating a reference variable?

int i = 17; We can declare reference variables for i as follows.

Creating References in C++

Sr.No Concept & Description
2 Reference as Return Value You can return reference from a C++ function like any other data type.

Which of the following is correct syntax for SELECT into statement?

SELECT INTO Syntax

SELECT column1, column2, column3, … WHERE condition; The new table will be created with the column-names and types as defined in the old table.

How do you declare a variable in PL SQL?

After the declaration, PL/SQL allocates memory for the variable’s value and the storage location is identified by the variable name. Syntax for declaring variable: Following is the syntax for declaring variable: variable_name [CONSTANT] datatype [NOT NULL] [:= | DEFAULT initial_value]

What is SQL declare?

SQL Variable declaration

The DECLARE statement is used to declare a variable in SQL Server. … Finally, we defined the data type of the variable. The value argument which is indicated in the syntax is an optional parameter that helps to assign an initial value to a variable during the declaration.

What is declare in Oracle SQL?

You can declare constants and variables in the declarative part of any PL/SQL block, subprogram, or package. Declarations allocate storage for a value, specify its datatype, and specify a name that you can reference. Declarations can also assign an initial value and impose the NOT NULL constraint.

Where do you declare variables in PLSQL procedures?

PL/SQL variables must be declared in the declaration section or in a package as a global variable. When you declare a variable, PL/SQL allocates memory for the variable’s value and the storage location is identified by the variable name.

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Which of the following is used to declare a record?

1) Which of the following is used to declare a record? Explanation: The %ROWTYPE attribute helps in creating table and cursor based records.

Which of the following is the correct syntax for creating an explicit cursor?

General Syntax for creating a cursor is as given below:

CURSOR cursor_name IS select_statement; cursor_name – A suitable name for the cursor. select_statement – A select query which returns multiple rows.

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